delim
Food Safety
Soluzioni per la sicurezza alimentare
di Restek

  • Esperienza garantita. Mettiamo decenni di esperienza nell'analisi della sicurezza alimentare al lavoro per voi.
  • I migliori prodotti di cromatografia Restek®: colonne GC e LC e prodotti di consumo, materiali di riferimento certificati e prodotti di preparazione del campione.
  • Siamo anche chimici. Sappiamo che avete bisogno di risultati accurati rapidi e ci impegniamo a trovare soluzioni adatte a voi.

In Restek, comprendiamo la natura frenetica delle analisi della sicurezza alimentare. In qualità di analisti, potreste dover segnalare i residui pesticidi nei mirtilli un giorno e quello successivo analizzare la carne per rilevare la presenza di farmaci veterinari. E indipendentemente da quanto sia complessa la matrice campione, le spedizioni aspettano; quindi dovete ottenere risultati accurati al primo giro. Ecco perché i chimici della sicurezza alimentare di Restek non si allontanano mai dal banco per sviluppare nuovi prodotti cromatografici e ottimizzare la preparazione del campione e dei metodi GC e LC da cui dipendete per fornire risultati accurati in modo veloce e in sicurezza. Ecco alcune delle aree in cui ci concentriamo per assistere meglio i laboratori di sicurezza alimentare.

In Restek, vi consideriamo colleghi e siamo personalmente impegnati verso il vostro successo. Lavorare ogni giorno con clienti come voi ci consente di conoscere le tendenze emergenti, le tecniche e le esigenze del mercato. In base a questa esperienza, lavoriamo sodo per sviluppare le migliori soluzioni di cromatografia per le difficili analisi della sicurezza alimentare. Il nostro obiettivo è fare in modo che il vostro lavoro sia più semplice fornendo i prodotti e le risorse per cromatografia di cui avete bisogno per ottenere subito i risultati corretti.

INCONTRATE GLI ESPERTI

Siamo chimici proprio come voi: sappiamo che non c'è niente di più frustrante che metodi che non funzionano come promesso. Poiché non vendiamo strumenti, manteniamo la nostra indipendenza e forniamo consigli obiettivi sui prodotti e i metodi che soddisfaranno meglio le vostre esigenze. Se state lottando con una matrice difficile o una coeluizione ostinata, contattateci, siamo qui per aiutarvi!

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Contatto

Columns

Colonne Rxi-5ms (silice fusa)

(fase a bassa polarità; difenil dimetil polisilossano Crossbond)

  • Colonne per uso generico per semivolatili, fenoli, ammine. solventi residui, droghe d'abuso, pesticidi, congeneri di PCB (p.e.Aroclor mix), impurità solventi
  • E' la colonna più inerte sul mercato
  • Testata e garantira per bleed ultra bassi; miglior rapporto segnale/rumore per una migliore sensibilità in MS
  • Range di emperature : -60 °C - 330/350 °C
  • Equivalente alle fasi USP G27 e G36

Colonne Rxi-624Sil MS (silice fusa)

(fase a polarità intermedia Crossbond)

  • Colonne a basso bleed e di elevata stabilità termica — temperature massime fino a 300–320 °C
  • Inerzia — eccellente forma del picco per un ampio range di composti
  • Selettività — fase G43 altamente selettiva per composti organici volatili e solventi residui, grande scelta per USP<467>
  • Prodotta per garantire la riproducibilità da a colonna a colonna — ottima per validare metodi

Colonne Rxi-PAH (silice fusa)

(fase proprietaria a polarità intermedia)

  • Ideali per analisi EFSA PAH4 —separano tutti i componenti prioritari: benz[a]anthracene, chrysene, benzo[b]fluoranthene e benzo[a]pyrene
  • Ottima risoluzione di chrysene dagli IPA interferenti triphenylene e cyclopenta[cd]pyrene
  • Separazione completa di benzo [b], [k], [ j] e [a] fluoranthenes
  • La stabilità termica a 360 °C permette l'analisi di composti a bassa volatilità come i dibenzo pyreni.

Pre-colonne/Retention Gap Rxi (silice fusa)

  • Durata maggiore della colonna
  • Eccellente inerzia — limiti di rivelazione più bassi per i composti attivi
  • picchi cromatografici più affilati mediante l'uso della retention gap
  • Temperatura massima: 360 °C.

Colonne Rxi-5Sil MS (silice fusa)

(fase a bassa polarità; 1,4-bis(dimetilsiloxi)fenilene dimetil polisilossano Crossbond)

  • Progettata per essere una colonna GC-MS a basso bleed
  • Eccelente inerzia per composti attivi
  • Colonne per uso generico —ideali per analisi in GC-MS di semivolatili, composti policiclici aromatici, idrocarburi policiclici, idrocarburi clorinati, ftalati, fenoli, ammine, pesticidi organoclorurati, pesticidi organofosforati, droghe, impurità solventi e idrocarburi
  • Range di temperatura: -60 °C 3 350 °C.

Pre-colonna/Retention gap/transfer line MXT trattati con Hydroguard (acciaio passivato)

  • Estende la durata della colonna analitica poichè previene il degrado dovuto alle iniezioni ripetute di acqua
  • Temperatura massima: 325 °C.

Colonne Ultra Aqueous C18 (USP L1)

Dimensioni delle particelle: 3 µm e 5 µm, sferica.
Pore size: 100 Å.
Carbon Load: 15%.
End-cap: no.
Range di pH: 2.5 - 8.
Limiti di temperatura: 80 °C.
Codice fase USP: L1.
Categoria fase: C18 modificata.
Tipo ligando: modificato polare e funzionalmente legato a C18, proprietaria.

Colonne LC Raptor ARC-18 (USP L1)

  • Ideali per alti flussi di lavoro in applicazioni in LC - MS/MS con una minima preparazione del campione
  • Profilo di ritenzione ben equilibrato per una migliore individuazione e integrazione di un gran numero di analiti multiclasse
  • Protette stericamente per sopportare fasi mobili a pH bassi senza sacrificare la ritenzione e la qualità del picco
  • Fanno parte della linea di colonna LC Raptor core-shell in silice SPP da 1,8 micron, 2,7 micron e 5 micron Raptor

Pre-colonne Raptor EXP

  • L'architettura "Free- Turn" consente di cambiare le cartucce manualmente senza danneggiare l'ingresso e l'uscita delle connessioni - Non è necessaro usare attrezzi
  • Brevettate con ferrule in titanio ibrido per essere installate più volte senza compromettere la tenuta ad alta pressione
  • Si auto-regolano per garantire la connessione ZDV (zero death volume)

Allure Silica Columns (USP L3)

Particle: 5 µm, spherical
Pore Size: 60 Å
Carbon Load:
End-cap: no
Surface Area: 450 m2/g
pH Range: 2.5 to 8
Maximum Temperature: 80 °C

Highly retentive phase for normal phase separations. Very high surface area, Type B silica packing.

Colonne LC Raptor FluoroFenil (USP L43)

  • In grado di lavorare sia in fase inversa sia in HILIC
  • Ideale per aumentare la sensibilità e selettività nelle analisi in LC-MS
  • Offre una maggiore ritenzione per le basi cariche.
  • Fa parte della linea di colonna LC Raptor core-shell in silice SPP da 1,8 micron, 2,7 micron e 5 micron Raptor
  • Si consiglia di passare ad una colonna LC Raptor fluorofenilica quando si ha bisogno di più ritenzione e selettività per separare composti basici e idrofilici, rispetto ad una C18.

Reference Standards

QuEChERS Reference Standards

Browse our comprehensive list of QuEChERS reference standards, including internal standards and mixes for AOAC QuEChERS methods.

Pesticide Standards for Food Safety

Browse our complete offering of pesticide standards formulated specifically for food safety.

Kit pesticidi multiresidui LC

  • Accurately detect and quantify pesticides of global food safety concern in a wide range of fruits, vegetables, and other commodities by LC-MS/MS.
  • Full kit contains 204 compounds of interest, covering many LC-determined pesticides listed by government agencies; individual ampuls also sold separately.

Kit pesticidi multiresidui GC

  • Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables, botanicals, and herbals such as tea, ginseng, ginger, echinacea, and dietary supplements.
  • Comprehensive 203-compound kit covers food safety lists by the FDA, USDA, and other global governmental agencies; individual ampuls also sold separately.

trans Fat Reference Standards

  • For accurate determination of trans fat content in foods and edible oils.
  • Pair with an Rt-2560 GC column for reliable AOAC and AOCS method performance.
  • Verified composition and stability.

USP Residual Solvent Standards

  • USP equivalent standards for the revised USP <467> general chapter—compliance without the cost—compare prices today.
  • The only complete source for USP <467>.

Miscela 1 pesticidi OP FAPAS serie 9 (10 componenti)

Equal concentration of all compounds. Suitable for GC-FPD, GC-NPD, and GC-MS analysis.

Kit standard allergene fragranza

  • Fully resolves 31 fragrance allergens with one analysis on an Rxi-17 column.
  • Ideal for GC-MS analysis following IFRA methodology.
  • Helps you meet EU requirements defined in the European Cosmetics Directive.
  • All components included at 400 ppm to allow dilution for calibration curves and use with different solvents.
  • Exceeds purity requirements outlined in IFRA method.
  • This kit contains one ampul of each of the following cat.#s: 33100, 33101, 33102, 33103, 33104. (Components of the kit are not available for individual sale.)

    See Compounds tab for a detailed list of compounds contained in this formulation.

Standard MOSH/MOAH (9 componenti)

  • Developed specifically for using LC coupled with GC-FID to accurately determine hydrocarbons found in mineral oils, which can migrate from processing equipment and packaging into food.
  • This 9-component mix contains noninterfering internal standards as well as both mineral oil saturated hydrocarbon (MOSH) and mineral oil aromatic hydrocarbon (MOAH) markers that are used to correctly cut LC fractions.

Pyrethrins Standard

Isomeric in nature, the pyrethrins neat material contains the following isomers: cinerin I and II, jasmolin I and II, and pyrethrin I and II. Isomer ratios for each lot are given in elution order on the certificate.

Standard interni marcati per analisi di pesticidi residui in matrice alimentare

  • Marcati isotopicamente per garantire il miglior approccio nell’analisi quantitativa di pesticide multiresiduali
  • La presa di varie opzioni vi permetterà di scegliere standard interni e surrogati per mitigare gli effetti dovuti alla matrice
  • Economici e compatibili sia con applicazioni LC-MS sia GC-MS; utilizzabili anche per ottimizzare le performance dei sistemi LC-MS/MS
  • Restek propone le migliori e le più complete soluzioni nell’ambito della sicurezza alimentare: Standard di Riferimento Certificati CRM di pesticidi, standard interni e surrogati, colonne LC e GC, QuEChERS, e molto altro!

QuEChERS Performance Standards Kit

Designed for use in all QuEChERS methods for pesticides in fruits and vegetables, including the original unbuffered method, AOAC 2007.01, and EN15662.

EFSA PAH4 Standard

Convenient high concentration standard (1,000 μg/mL) allows you to dilute as needed to economically prepare custom mixes. Contains all four EFSA PAH4 compounds in toluene.

Standard UE 15+1 per gli idrocarburi policiclici aromatici (PAH) (16 componenti)

  • Formulated to contain the 16 major European Food Safety Authority (EFSA) PAH compounds.
  • High concentration (100 μg/mL) solution provides value and flexibility. Dilute as needed for fortification and calibration mixes.
  • Low-volatility toluene solvent provides longer shelf life, which helps ensure more accurate results.
  • Broad solvent miscibility—compatible with acetonitrile, the QuEChERS solvent.

Miscela standard interno SV (6 componenti)

  • High purity for consistent results.
  • Free quality assurance data package available online.
  • Highest concentrations commercially available.

Standard MOSH/MOAH (9 componenti)

  • Developed specifically for using LC coupled with GC-FID to accurately determine hydrocarbons found in mineral oils, which can migrate from processing equipment and packaging into food.
  • This 9-component mix contains noninterfering internal standards as well as both mineral oil saturated hydrocarbon (MOSH) and mineral oil aromatic hydrocarbon (MOAH) markers that are used to correctly cut LC fractions.

Melamine Analysis Kit

Everything you need for GC analysis of melamine. Includes Rxi-5Sil MS GC column, reference standards, derivatization reagent, centrifuge tubes, syringe filters, and easy-to-follow instructions.

Sample Handling

Provette dSPE Q-sep QuEChERS per estrazione cleanup

Preparazione del campione per analisi di pesticidi multiresiduo Veloce e Facile

  • Packaged in foil subpacks of 10 for enhanced protection and storage stability.
  • Ready-to-use tubes, no glassware required.
  • Pre-weighed, ultra-pure sorbents.
  • Support original unbuffered, AOAC (2007.01), European (EN 15662), and mini-multiresidue QuEChERS methods.

Centrifuga Q-sep 3000

per QuEChERS

  • Supports 50 mL, 15 mL, and 2 mL centrifuge tubes.
  • Small footprint requires less bench space.
  • Safe and reliableUL, CSA, and CE approved; 1-year warranty.

Bottiglia Q-sep Top Solvent dispenser

  • Adjustment knob offers 56 output volume settings from 2.5 mL to 30 mL per stroke (0.5 mL increments)ideal for QuEChERS methods!
  • Base features 30 mm threads and includes four adaptors (25 mm, 28 mm, 38 mm, and 45 mm).
  • Individually calibrated in accordance with ISO 8655 standards (certificate included) and can also be recalibrated by the user.
  • PTFE, glass, and polypropylene construction for excellent chemical compatibility and 100% autoclavability.
  • Integral safety discharge reduces risk of accidental dispensing, and nozzle cap prevents dripping.
  • Easy to disassemble for cleaning and servicing.

Rack per provette Q-sep

  • Available for 2 mL, 15 mL, and 50 mL tubes.
  • Alphanumerical grid reference on top tier for easy identification of samples.
  • Easy to assemble; simply fold and snap together securely.

Cartucce SPE per cleanup di pestici residuali

  • Convenient, multiple adsorbent beds in a single cartridge.
  • For use in multiresidue pesticide analysis to remove matrix interferences.
  • Excellent for cleanup of dietary supplement extracts.

Cartucce SPE Resprep (Fase Diretta)

Hydrophilic (polar) adsorbents used to extract hydrophilic analytes from nonpolar matrices, such as organic solvents (e.g., polar contaminants from sample extracts).

Tubi da centrifuga vuoti, FEP

Sturdy, easy-to-clean FEP (fluorinated ethylene propylene)-lined tubes last indefinitely under normal usage conditionsand cost 50% less!

Standard Filter Vials Thomson SINGLE StEP

  • Recommended for samples containing less than 10% solid particulates.
  • Easy-to-use vials offer fast sample filtration and require only a squeeze of your fingers.
  • Minimize sample loss by eliminating multiple transfers.
  • Color-coded caps allow easy identification of 0.2 μm or 0.45 μm membranes in PVDF, PTFE, PES, or nylon.
  • Preslit PTFE/silicone caps help eliminate broken autosampler needles and cored septa.
  • Rugged polypropylene vial houses insert with 450 μL loading capacity and low dead volume (120 μL).
  • Fit most standard 12 x 32 mm autosamplers, including UHPLC instruments.

Filtri Siringa con ingresso Luer Lock

  • L’attacco Luer lock offer una connessione a tenuta con le siringhe .
  • Ampia varietà di dimensioni, tipologie di membrane e porosità.
  • Identificabili con colori diversi.
  • Corpo in polipropilene.
  • Autoclavabili fino a 121°C per 15 minuti.
  • Risparmio garantito sulle grandi quantità

Resprep VM-96 Collettore da vuoto

per sistemi 96 Well Plates

  • Corpi robusti in acciaio inossidabile e alluminio restano stabili e non scivolano come i modelli più leggeri
  • Una finestra trasparente permette una facile osservazione dell’altezza della piastra e del livello di gocciolamento
  • O-ring e guarnizioni di tenuta resistono al danno provocato dai solventi e forniscono nel tempo una chiusura ermetica a prova di perdita.
  • Parti prodotte con alto livello di precisione si assemblano velocemente e facilmente, con un perfetto allineamento della cartuccia (Well Plate) e della piastra di raccolta .
  • Altezza della piastra customizzata per soddisfare esattamente le vostre richieste: un adattatore di precisione per l’altezza, e cinque diversi spessori permettono una facile ed accurata configurazione.
  • Lavora con Well Plates e piastre di raccolta di qualsiasi produttore , per estrazione in fase solida (SPE), estrazione liquida supportata (SLE) , precipitazione di proteine (PPT) e filtrazione.

Restek PAL SPME Arrow

  • Robusta struttura in acciaio inossidabile che garantisce una maggiore durata.
  • Estrazione più rapida per analizzare più campioni in minor tempo.
  • Miglior sensibilità che permette di operare a più bassi limiti di detection.

Fibre SPME Restek PAL

  • Idonee per un’ampia gamma di analiti e matrici diverse tra loro.
  • Performance affidabili, equivalenti o superiori a quelle dei prodotti di altri brand.
  • Perno metallic più resistente di quello in plastica.
  • Ottimizzate per gli autocampionatori e sistemi PAL, compatibili con la maggioranza degli iniettori GC.
  • L’SPME automatizzata riduce la manipolazione del campione ed il consumo di solventi.

Supplies & Accessories

Connettori Press-Tight universali

  • Connect a guard column to an analytical column.
  • Repair a broken column.
  • Connect a column outlet to a transfer line.

Dynamic Duo (Rilevatore di perdite e Flussimetro ProFLOW 6000 Restek)

Proteggete il vostro strumento e migliorate la qualità dei dati grazie a questa accoppiata vincente. Verificare la presenza di perdite ed i flussi vi permetterà di ottimizzare le analisi e prevenire costosi inconvenienti.

Holder a connessione diretta EXP

  • L'architettura "Free- Turn" consente di cambiare le cartucce manualmente senza danneggiare l'ingresso e l'uscita delle connessioni - Non è necessaro usare attrezzi
  • Brevettate con ferrule in titanio ibrido per essere installate più volte senza compromettere la tenuta ad alta pressione
  • Si auto-regolano per garantire la connessione ZDV (zero death volume)
  • L'holder a connessione diretta EXP richiede cartucce dedicate; disponibili nei seguenti formati: 2,1, 3,0 e 4,6mm

Raccordi riutilizzabili EXP per HPLC e UHPLC per raccordi da 10-32 e tubi da 1/16"

Raccordi EXP da serrare a mano

  • Hand-tight fitting style achieves effortless HPLC seals—no tools needed for a 8,700+ psi seal.
  • Both hand-tight and hex-head styles wrench tighten for reliable UHPLC use up to 20,000+ psi!
  • Patented ferrule can be installed repeatedly without compromising high-pressure seal.
  • Hybrid design combines the durability of titanium with the sealing ability of PEEK.
  • Cutting-edge system provides ZDV (zero dead volume) connection to any 10-32 female port.
  • Compatible with 1/16" PEEK and stainless steel tubing.

GC Accessories

Full line of GC consumables, lab tools to make your life easier, and replacement parts for all major instrument manufacturers.

LC Accessories

Quality replacement parts, tools, and accessories for liquid chromatography.

Alimentare, Aromi & Fragranze

Featured Application: Mycotoxins on Raptor FluoroPhenyl - Highly Selective LC-MS/MS Analysis of Mycotoxins from Multiple Classes

Mycotoxin contamination of crops is not only a public health concern, but it also has a huge impact on the global economy. This highly selective LC-MS/MS analysis of 20 mycotoxins in just 9 minutes allows scientists to accurately identify toxins, to monitor food products for contamination, and to support control strategies that prevent economic loss.

Alimentare, Aromi & Fragranze

Featured Application: Analysis of Melamine and Related Compounds on Raptor HILIC-Si - Trace-Level Analysis of Melamine and Related Compounds by LC-MS/MS

The analysis of melamine and related compounds is critical in protecting consumers from adulterated food products. While these highly polar analytes are difficult to retain and accurately quantify on many columns, the Raptor HILIC-Si column and LC-MS/MS method shown here allow quick and complete separations, so melamine and related compounds can be accurately identified and quantified even at residual levels.

Ambientale

Featured Application: Paraquat and Diquat on Raptor HILIC-Si - LC-MS/MS Analysis of Paraquat and Diquat without Ion-Pairing Reagents

LC-MS/MS analysis of paraquat and diquat herbicides is an important tool for protecting human and environmental health. However, the ion-pairing reagents that are commonly used to improve retention, resolution, and peak shape have a negative impact on sensitivity and can contaminate the system necessitating frequent cleaning. The LC-MS/MS analysis of paraquat and diquat presented here provides complete separation and good peak response for both target analytes in a fast, 7-minute gradient run without the use of troublesome ion pairing reagents.

Alimentare, Aromi & Fragranze

Comprehensive Pesticide Residue Analysis by LC-MS/MS Using an Ultra Aqueous C18 Column

Analysis of pesticide residues in foods is complicated by the large number of target compounds. LC-MS/MS analysis using an Aqueous C18 column provides more comprehensive results than GC alone.

Alimentare, Aromi & Fragranze

Featured Application: Multiclass Veterinary Antibiotics on Raptor C18 by LC-MS/MS - One Analysis, One Column, Less than 9 Minutes for Over 60 Multiclass Antibiotics

The use of antibiotics on food-producing animals is a public health and safety concern due to the potential of generating drug-resistant bacteria. A sensitive, efficient, and reliable analytical method for different classes of antibiotics is necessary to meet regulations covering maximum residue limits (MRL) for a variety of animal tissue and food products. The Raptor C18 LC column is the ideal choice for antibiotic residue analysis.

Alimentare, Aromi & Fragranze

Analysis of Nitrofurans in Honey - Using LC/MS/MS and an Ultra C18 Column

Nitrofurans are a class of veterinary antibiotics used to increase growth rate and prevent or treat disease in animals. Determining levels of nitrofurans in animal tissue, or even products such as honey, is important in studying drug resistance and allergies in humans. The Ultra C18 HPLC column is an excellent choice for LC-MS/MS analysis of nitrofurans at low levels in complex matrices such as honey. Here we show excellent sensitivity, resolution, and peak shape at trace levels.

Alimentare, Aromi & Fragranze

Analytical Method for Polycyclic Aromatic Hydrocarbons (PAHs) in Yerba Mate Tea Using Modified QuEChERS, Solid Phase Extraction and GC-TOFMS and GC-MS/MS

This application note describes the development of an analytical method for PAHs in tea that allows analysts to more quickly and accurately characterize target PAHs. Sample preparation is based on a modified QuEChERS extraction and solid phase extraction sample cleanup. Both GC-TOFMS and GC-MS/MS techniques were used and analyses were optimized for resolution of isobaric compounds, as well as for maintaining a reasonable analysis time.

Editoriale

Food Technology -- Are We as Safe as We Think?

A thought-provoking discussion of the risks of rapid technology advancement and food safety.
by Dr. Konrad Grob, Kantonales Laboratory, Zurich

Alimentare, Aromi & Fragranze

Meet New Requirements for Melamine Analysis at 1µg/g in Infant Formula

The recent establishment of a 1µg/g safety threshold for melamine in infant foods has led to an immediate need for more sensitive methods. Here we established GC/MS conditions for highly reproducible analyses and evaluated the effectiveness of both solvent-based and matrix-matched standards. Using this method, melamine and cyanuric acid were reliably detected at and below 1µg/g in infant formula.

Editoriale

Matrix Effects in Multi-Residue Pesticide Analysis When Using Liquid Chromatography-Tandem Mass Spectrometry

Matrix effects present a significant challenge to multi-residue pesticide analysis of food samples using LC/MS/MS. In this editorial, Dr. Kai Zhang, of the FDA Center for Food Safety and Applied Nutrition, discusses approaches that minimize matrix effects.

Alimentare, Aromi & Fragranze

Featured Application: LC Analysis of 4-MEI on Raptor FluoroPhenyl Columns - Reliable HILIC LC-MS/MS Analysis of 4-Methylimidazole (4-MEI) on Raptor FluoroPhenyl Columns

Raptor FluoroPhenyl columns perform well in both HILIC and reversed phase modes, giving method developers the flexibility to select the mode that performs best for their specific compounds of interest. Here we use a Raptor Fluorophenyl column in HILIC mode for LC analysis of 4-methylimidazole (4-MEI). This approach provides more retention than reversed phase mode and can be applied to determining 4-MEI levels in caramel colorings to monitor formulations and also in foods and beverages to assess potential exposure.

Alimentare, Aromi & Fragranze

Mitigating Matrix Effects: Examination of Dilution, QuEChERS, and Calibration Strategies for LC-MS/MS Analysis of Pesticide Residues in Diverse Food Types

LC-MS/MS is popular for monitoring pesticide residues in food due to its selectivity and sensitivity; however, matrix effects can cause poor data quality and difficult quantification. We evaluated the relative effectiveness of sample dilution, QuEChERS cleanup, solvent-based calibration, and matrix-matched calibration strategies to mitigate matrix effects in celery, kale, avocado, lime, and brown rice flour.

Alimentare, Aromi & Fragranze

A Comprehensive Approach to Pesticide Residue Testing, Including Non-Target Analysis, for Fruits, Vegetables, and Nuts, Using QuEChERS, LC-MS/MS, and GCxGC-TOFMS

Food commodities that varied in water, fat, and pigment content were fortified with pesticides and processed using a QuEChERS sample preparation technique. Samples were analyzed by both GCxGC-TOFMS and LC-MS/MS, and good recoveries were obtained for most pesticides in most commodities.

Alimentare, Aromi & Fragranze

Comparing Pesticide Residues in Amish and Commercially Grown Strawberries and Spinach Using QuEChERS, Various dSPE Sorbents, and GC-TOFMS

QuEChERS extraction, dSPE cleanup, and GC-TOFMS analysis were used to assess pesticide residue levels in strawberry and spinach from both commercial and Amish growers. Various dSPE sorbent products were compared to determine which were most effective.

Alimentare, Aromi & Fragranze

Evaluation of Dispersive and Cartridge Solid Phase Extraction (SPE) Cleanups for Multiresidue Pesticides in QuEChERS Extracts of Finished Tobacco Using GCxGC-TOFMS

We compared the efficacy of dSPE and cSPE cleanup methods for multiresidue pesticide analysis of QuEChERS extracts of finished tobacco products using GCxGC-TOFMS. Cleanup with dSPE tubes containing 7.5 mg of GCB and 25 mg of PSA produced better results than other methods, with average recoveries of 92% and 91% for 500 ppb and 50 ppb fortifications respectively.

Interesse Generale

Prepare Olive Oil Samples for Pesticide Residue Analysis in Half the Time With a Fraction of the Solvent Using dSPE

Simplify and speed up sample preparation with Resprep dSPE tubes! Here we show the extraction and clean-up of pesticide residues from olive oil samples—twice as fast as GPC, with only a fraction of the solvent required for conventional SPE.

PDF Document

New Rxi-PAH GC Column; Resolve Important Isobaric Polycyclic Aromatic Hydrocarbons for Food Safety and Environmental Methods

Separate isobaric polycyclic aromatic hydrocarbons, including priority EFSA PAH4 compounds benz[a]anthracene, chrysene, benzo[b]fluoranthene, and benzo[a]pyrene, easily and accurately on an Rxi-PAH column. Whether you need more resolution or faster analysis, these new GC columns offer the selectivity and efficiency you need for food safety and environmental PAH analysis. (PDF - 0MB)

PDF Document

Ensure Successful Polycyclic Aromatic Hydrocarbon (PAH) Analysis—Choose Specialized Rxi-PAH Columns

Whether you are analyzing comprehensive lists or focusing on the EFSA PAH4, the Rxi-PAH column ensures your success by combining efficiency, selectivity, and robustness to produce a column that outperforms all competitors’ columns. Chose the configuration that best suits your application and be confident that you are reporting accurate results without bias from interferences.​ (PDF - 0MB)

PDF Document

Accurately Quantify 380 Pesticides Using LC-MS/MS and GC-MS/MS

Stop spending your time and money developing LC-MS/MS or GC-MS/MS multiresidue pesticide methods and mixing reference standards when you could be running samples. Restek’s expert formulations chemists and chromatographers have already done the work for you—with guaranteed accuracy and at a lower cost. (PDF - 0MB)

PDF Document

EXP and EXP2 Fittings: Reusable fittings for easy, reliable HPLC & UHPLC connections

EXP and EXP2 fittings are now available from Restek. These reusable HPLC/UHPLC fittings feature a patented titanium/PEEK ferrule that provides repeated zero-dead-volume connections to any 10-32 female port without compromising high-pressure seals. (PDF - 0MB)

PDF Document

Raptor ARC-18 LC Columns Brochure

Raptor LC columns combine the speed of superficially porous particles (i.e., SPP or “core-shell”) with the resolution of highly selective USLC technology. The sterically protected ARC-18 phase was designed and intended specifically for use with acidic mobile phases on LC-MS/MS systems. Even after extended use in low-pH (≤ 2.0) conditions, it offers consistent and well-balanced retention, peak shape, and response. Choose Raptor ARC-18 columns for the rapid analysis of large, multiclass assays by mass spectrometry. (PDF - 5MB)

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QuEChERS Sample Preparation Procedures

Instruction sheet for QuEChERS sample preparation, cat.# 25847, 25848, 25849, 25850, 25851, 25852, 26123, 26124, 26125, 26126, 26215, 26216, 26217, 26218, 26219, 26220, 26221, 26222, 26223, 26224, 26225, 26226, 26242, 26243, 26244, 26245. (PDF - 0MB)

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QuEChERS Made Even Easier: Comprehensive Solutions Simplify Sample Prep and Analysis

Learn how to use the QuEChERS approach to perform faster, easier sample preparation and cleanup for multiresidue pesticide analysis. Q-sep QuEChERS products save time, money, and materials compared to modified Luke methods. (PDF - 0MB)

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HPLC Analysis of Glucosinolates in Vegetable Extracts without Ion Pairing Using an Ultra Aqueous C18 Column

Glucosinolates with hydrophilic functional groups are very difficult to retain by conventional reversed phase HPLC, and when the functional groups in a sample are diverse, polarity can differ widely, complicating the problem. Until now, reversed phase HPLC with an ion pairing reagent has been the inconvenient, but necessary, approach to these analyses. This 2-page note describes a column and conditions for analyses of glucosinolates, without ion pairing. (PDF - 0MB)

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Developing New Methods for Pesticides in Dietary Supplements

QuEChERS is a simple, effective approach to sample prep that can be applied to the analysis of pesticides in dietary supplements. Here, we demonstrate a QuEChERS, cSPE, GC-TOFMS procedure that results in good recoveries for a wide range of pesticides in dandelion root. (PDF - 0MB)

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Residual Solvent Analysis: Implementing USP <467>

This 12-page reference includes a of headspace fundamentals, the revised USP <467> method (July, 2008), chromatography for Procedures A, B, and C, and technical tips for optimization. Guidance on fast, effect method development is given. (PDF - 0MB)

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Fast, Simple QuEChERS Extraction and Cleanup of Pesticide Residue Samples

QuEChERS dSPE methods simplify extract cleanup, reduce material costs, and improve sample throughput. Here we demonstrate the effectiveness of QuEChERS sample cleanup using a multiresidue analysis of pesticides on strawberries. (PDF - 0MB)

GC Chromatograms

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Food Safety
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Pharmaceutical
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LC Chromatograms

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Food Safety
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Environmental
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General Interest
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