Pure Chromatography
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OVIs by Dynamic Headspace and Gerstel MACH on Rtx-624 (G43) and Rtx-WAX (G16)
Peaks | |
---|---|
1. | Methanol![]() |
2. | Acetonitrile![]() |
3. | Dichloromethane![]() |
4. | trans-1,2-Dichloroethylene![]() |
5. | Hexane![]() |
6. | cis-1,2-Dichloroethylene![]() |
7. | Nitromethane![]() |
8. | Tetrahydrofuran![]() |
9. | Chloroform![]() |
10. | Cyclohexane![]() |
11. | 1,2-Dimethoxyethane![]() |
Peaks | |
---|---|
12. | Trichloroethylene![]() |
13. | Methylcyclohexane![]() |
14. | 1,4-Dioxane![]() |
15. | Pyridine![]() |
16. | Toluene![]() |
17. | 2-Hexanone![]() |
18. | Chlorobenzene![]() |
19. | Ethyl benzene![]() |
20. | m-Xylene![]() |
21. | p-Xylene![]() |
22. | o-Xylene![]() |
23. | Tetralin![]() |
* septum components

GC_PH00845
Columns | Rtx-624 20 m, 0.18 mm ID, 1.00 µm (cat.# 40924) |
and Rtx-WAX (G16) 20m, 0.18mm ID, 0.4µm (custom) | |
using IP Deactivated Guard Column 5 m, 0.32 mm ID (cat.# 10044) | |
with Universal “Y” Press-Tight Connector (cat.# 20405) | |
Sample | Residual Solvents Class 2 - Mix A (cat.# 36271) |
Residual Solvents Class 2 - Mix B (cat.# 36272) | |
Diluent: | 0.5mL DI water/~0.2g sodium sulfate in 20mL headspace vial; components at 0.10 - 6.00µg |
Injection | headspace-trap split (split ratio 20:1) |
Headspace-Trap | |
Instrument: | Tekmar HT3 |
Inj. Temp.: | 220 °C |
Transfer Line Temp.: | 220 °C |
Valve Oven Temp.: | 220 °C |
Standby flow rate: | 50 mL/min |
Trap Standby Temp: | 40 °C |
Trap Sweep Temp: | 40 °C |
Preheat Mixer: | On |
Preheat Mixer Time: | 2.0 min |
Preheat Mixing Level: | 5 |
Preheat Mixer Stabilize Time: | 0.5 min |
Sample Temp.: | 80 °C |
Sweep Flow Rate: | 75 mL/min |
Sweep Flow Time: | 5.0 min |
Dry Purge: | 10.0 min, flow 100 mL/min @ 25 °C |
Desorb Preheat Temp: | 245 °C |
Desorb: | 1.0 min @ 250 °C |
Trap Bake Temp: | 260 °C |
Trap Bake Time: | 6.0 min |
Trap Bake Flow: | 450 mL/min |
Oven | |
Oven Temp.: | 250 °C |
Carrier Gas | He |
Detector | FID @ 250 °C |
Make-up Gas Flow Rate: | 45 mL/min |
Instrument | Agilent 6890 with Gerstel Modular Accelerated Column Heater (MACH) |
Notes | Sample preheat time: 15.00 min. Flow rate: Constant Flow, Column 1: 0.85mL/min.; Column 2: 0.99mL/min. Gerstel temps.: Column 1: 50°C (2 min.) to 80°C at 20°C/min. (1 min.), to 200°C at 40°C/min. (2 min.) Column 2: 35°C (2 min.) to 60°C at 100°C/min. (1 min.), to 200°C at 40°C/min. (2 min.) |
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