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Featured Application: Extractable Semivolatile Organic Compounds on Rxi-5Sil MS

Analyze More Semivolatile Samples per Shift Using Split Injection and an Rxi-5Sil MS Column

  • Faster oven cycle increases sample throughput.
  • Split injection reduces maintenance frequency.
  • Reliably meets or exceeds method requirements for sensitivity and linearity

Semivolatiles are typically analyzed using splitless injection, but this approach results in slow analysis times, frequent maintenance due to matrix accumulation, and injection-to-injection variability. Combined, these factors reduce the number of samples that can be analyzed before quality control criteria are no longer met. Using split injection is a simple way to increase sample throughput for semivolatiles analysis because it provides faster oven cycle times due to the use of higher initial oven temperatures. In addition, because less matrix is injected onto the column, more samples can be analyzed before downtime is required for maintenance.

As an alternative to splitless injection, using split injection with a robust, low-bleed Rxi-5Sil MS column produces highly repeatable results for trace-level analysis of semivolatiles, such as those listed in EPA Method 8270D. The selectivity of this column ensures reliable separation of problematic compounds, like benzo[b]fluoranthene and benzo[k]fluoranthene. An Rxi-5Sil MS column was selected for this work because it provides consistent chromatographic performance for semivolatiles analysis, making it easier to meet Method 8270 requirements while benefiting from the faster sample throughput obtained with split injection.


Peaks
1.1,4-Dioxane-d8 (IS)
2.1,4-Dioxane
3.N-Nitrosodimethylamine
4.Pyridine
5.2-Fluorophenol (SS)
6.Phenol-d6 (SS)
7.Phenol
8.Aniline
9.Bis(2-chloroethyl)ether
10.2-Chlorophenol
11.1,3-Dichlorobenzene
12.1,4-Dichlorobenzene-D4 (IS)
13.1,4-Dichlorobenzene
14.Benzyl alcohol
15.1,2-Dichlorobenzene
16.2-Methylphenol
17.Bis(2-chloroisopropyl)ether
18.4-Methylphenol
19.3-Methylphenol
20.N-Nitroso-di-n-propylamine
21.Hexachloroethane
22.Nitrobenzene-D5 (SS)
23.Nitrobenzene
24.Isophorone
25.2-Nitrophenol
26.2,4-Dimethylphenol
27.Benzoic acid
28.Bis(2-chloroethoxy)methane
29.2,4-Dichlorophenol
30.1,2,4-Trichlorobenzene
31.Naphthalene-D8 (IS)
32.Naphthalene
33.4-Chloroaniline
34.Hexachlorobutadiene
35.4-Chloro-3-methylphenol
36.2-Methylnaphthalene
37.1-Methylnaphthalene
38.Hexachlorocyclopentadiene
39.2,4,6-Trichlorophenol
40.2,4,5-Trichlorophenol
41.2-Fluorobiphenyl (SS)
42.2-Chloronaphthalene
43.2-Nitroaniline
44.1,4-Dinitrobenzene
45.Dimethyl phthalate
46.1,3-Dinitrobenzene
47.2,6-Dinitrotoluene
Peaks
48.1,2-Dinitrobenzene
49.Acenaphthylene
50.3-Nitroaniline
51.Acenaphthene-d10 (IS)
52.Acenaphthene
53.2,4-Dinitrophenol
54.4-Nitrophenol
55.2,4-Dinitrotoluene
56.Dibenzofuran
57.2,3,5,6-Tetrachlorophenol
58.2,3,4,6-Tetrachlorophenol
59.Diethyl phthalate
60.4-Chlorophenyl phenyl ether
61.Fluorene
62.4-Nitroaniline
63.4,6-Dinitro-2-methylphenol
64.N-nitrosodiphenylamine
65.1,2-Diphenylhydrazine
66.2,4,6-Tribromophenol (SS)
67.4-Bromophenyl phenyl ether
68.Hexachlorobenzene
69.Pentachlorophenol
70.Phenanthrene-D10 (IS)
71.Phenanthrene
72.Anthracene
73.Carbazole
74.di-n-Butyl phthalate
75.Fluoranthene
76.Benzidine
77.Pyrene-D10 (SS)
78.Pyrene
79.p-Terphenyl-d14 (SS)
80.3,3'-Dimethylbenzidine
81.Butyl benzyl phthalate
82.Bis(2-ethylhexyl)adipate
83.3,3'-Dichlorobenzidine
84.Benz[a]anthracene
85.Chrysene-D12 (IS)
86.Bis(2-ethylhexyl)phthalate
87.Chrysene
88.Di-n-octyl phthalate
89.Benzo[b]fluoranthene
90.Benzo[k]fluoranthene
91.Benzo[a]pyrene
92.Perylene-D12 (IS)
93.Indeno[1,2,3-cd]pyrene
94.Dibenz[a,h]anthracene
95.Benzo[ghi]perylene
Semivolatiles on Rxi-5Sil MS by U.S. EPA Method 8270 (Split Injection)
GC_EV1248
ColumnRxi-5Sil MS, 30 m, 0.25 mm ID, 0.25 µm (cat.# 13623)
Sample8270 MegaMix (cat.# 31850)
8270 Benzidines mix (cat.# 31852)
Benzoic acid (cat.# 31879)
1,4-Dioxane (cat.# 31853)
Revised B/N surrogate mix (cat.# 31888)
Acid surrogate mix (4/89 SOW) (cat.# 31063)
Revised SV internal standard mix (cat.# 31886)
Diluent:Methylene chloride
Conc.:40 µg/mL (IS/SS 20 µg/mL)
Injection
Inj. Vol.:1 µL split (split ratio 10:1)
Liner:Premium 4 mm Precision liner w/wool (cat.# 23305.5)
Inj. Temp.:270 °C
Split Vent Flow Rate:12 mL/min
Oven
Oven Temp.:70 °C (hold 1 min) to 285 °C at 28 °C/min to 305 °C at 3 °C/min to 320 °C at 30 °C/min (hold 1 min)
Carrier GasHe, constant flow
Flow Rate:1.2 mL/min
DetectorMS
Mode:Scan
Transfer Line Temp.:280 °C
Analyzer Type:Quadrupole
Source Temp.:270 °C
Quad Temp.:150 °C
Electron Energy:70 eV
Solvent Delay Time:1.3 min
Tune Type:DFTPP
Ionization Mode:EI
Scan Range:35-550 amu
Scan Rate:5.36 scans/sec
InstrumentAgilent 7890A GC & 5975C MSD

Ricerche correlate

Semivolatiles analysis

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Method 8270