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USP Residual Solvents on Rtx-1301 (G43) by Static Headspace
Peaks | tR (min) | Conc. (µg/mL) | |
---|---|---|---|
1. | Dichloromethane ![]() | 5.110 | 12.0 |
2. | Chloroform![]() | 9.285 | 1.2 |
3. | Benzene ![]() | 11.173 | 0.04 |
4. | Trichloroethylene ![]() | 14.647 | 1.6 |
5. | 1,4-Dioxane![]() | 17.436 | 7.6 |

Column | Rtx-1301 w/5m Integra-Guard, 30 m, 0.53 mm ID, 3.00 µm (cat.# 16085-126) |
Sample | USP <467> Calibration Mixture #5 (cat.# 36007) |
Diluent: | DMSO |
Conc.: | To each 22 mL headspace vial 5ml water, ~ 1.0g of sodium sulfate and 100µL of stock standard were added. |
Injection | headspace-loop split (split ratio 2:1) |
Headspace-Loop | |
Inj. Port Temp.: | 180 °C |
Instrument: | Teledyne Tekmar HT3 |
Inj. Time: | 1.0 min |
Transfer Line Temp.: | 150 °C |
Valve Oven Temp.: | 150 °C |
Standby flow rate: | 10 mL/min |
Sample Temp.: | 80 °C |
Platen temp equil. time: | 2.0 min |
Sample Equil. Time: | 15.0 min |
Mixer time: | 2.0 min |
Mixing level: | 5 |
Mixer stabilize time: | 0.5 min |
Vial Pressure: | 15 psi |
Pressurize Time: | 2.0 min |
Pressure Equilibration Time: | 0.5 min |
Loop Pressure: | 5 psi |
Loop Fill Time: | 2.0 min |
Loop fill equil. time: | 0.5 min |
Oven | |
Oven Temp.: | 40 °C (hold 20 min) to 240 °C at 25 °C/min (hold 10 min) |
Carrier Gas | He, constant flow |
Flow Rate: | 5 mL/min |
Detector | FID @ 250 °C |
Make-up Gas Flow Rate: | 45 mL/min |
Notes | FID conditions: hydrogen flow: 40 mL/min. air flow: 450 mL/min. |
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