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GC COLUMNS | APPLICATION-SPECIFIC COLUMNS
Environmental
Rtx®-OPPesticides Columns (fused silica)
(proprietary Crossbond® phases)
Rtx®-OPPesticides/Rtx®-OPPesticides2
• Application-specific columns for organophosphorus pesticides; best column
combination for U.S. EPA Method 8141.
• Low bleed—ideal for GC-FPD, GC-NPD, or GC-MS analyses.
• Stable to 330 °C.
Using sophisticated computer modeling software, we created two stationary phases
for separating the 53 organophosphorus pesticides (OPP) listed in EPA Method 8141.
Separation is improved and analysis time is significantly reduced, compared to other
columns. The extended upper temperature limit of these phases (330 °C) allows analysts
to bake out high molecular weight contamination typically associated with pesticide
samples. The low-bleed columns are a perfect match for sensitive detection systems.
Rtx®-OPPesticides2 Columns (fused silica)
(proprietary Crossbond® phases)
Pesticides Analysis (Organophosphorus)
• Better separations
• Faster analyses
Restek innovation!
FAST
efficient analysis
of OPPs in EPA
Method 8141
Organophosphorus Pesticides
U.S. EPA Method 8141A
on Rtx®-OPPesticides2
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Time (min)
GC_EV00602
Column Rtx®-OPPesticides2, 30 m, 0.25 mm ID, 0.25 µm (cat.# 11243)
Sample Triphenylphosphate (cat.# 32281)
Tributylphosphate (cat.# 32280)
8140/8141 OP pesticide calibration mix A (cat.# 32277)
8141 OP pesticide calibration mix B (cat.# 32278)
Conc.: 100 ppm (100 ng on-column)
Injection
Inj. Vol.: 1.0 µL splitless (hold 0.4 min)
Liner: Double taper splitless (4 mm) (cat.# 20785)
Inj. Temp.: 250 °C
Oven
Oven Temp.: 80 °C (hold 0.5 min) to 140 °C at 20 °C/min to 210 °C at 4 °C/min
(hold 1 min) to 280 °C at 30 °C/min (hold 5 min)
Carrier Gas He, constant flow
Flow Rate: 1.0 mL/min
Detector MS
Mode: Scan
Transfer Line Temp.: 280 °C
Analyzer Type: Quadrupole
Ionization Mode: EI
Scan Range: 35-400 amu
Notes U.S. EPA Method 8141A custom standard mix. Additional mixes not
shown. Contact Restek for more information.
Peaks
1. Dichlorvos
2. Hexamethylphosphoramide
3. Mevinphos
4. Trichlorfon
5. TEPP
6. Demeton-o
7. Thionazin
8. Tributyl phosphate (IS)
9. Ethoprop
10. Naled
11. Sulfotepp
12. Phorate
13. Dicrotophos
14. Demeton-S
15. Monocrotophos
16. Terbufos
17. Dimethoate
18. Dioxathion
19. Fonophos
20. Diazinon
21. Disulfoton
22. Phosphamidon isomer
23. Dichlorofenthion
24. Chlorpyrifos methyl
25. Phosphamidon
26. Methyl parathion
27. Ronnel
28. Fenitrothion
29. Aspon
30. Malathion
31. Chlorpyrifos
32. Trichloronate
33. Parathion-ethyl
34. Fenthion
35. Merphos
36. Chlorfenvinphos
37. Crotoxyphos
38. Stirofos
39. Prothiofos
40. Merphos oxone (breakdown
product)
41. Ethion
42. Fensulfothion
43. Sulprofos
44. Carbophenothion
45. Famphur
46. Triphenyl phosphate (SS)
47. Epn
48. Phosmet
49. Leptophos
50. Tri-o-cresyl phosphate
51. Azinphos-methyl
52. Azinphos-ethyl
53. Coumaphos
Best column for most
resolved compounds for
Method 8141A.
20-Meter 30-Meter
ID df temp. limits cat.# price cat.# price
0.18 mm 0.20 µm -20 to 310/330 °C 11244
0.25 mm 0.25 µm -20 to 310/330 °C 11243
0.32 mm 0.32 µm -20 to 310/330 °C 11241
0.53 mm 0.50 µm -20 to 300/330 °C 11242
30-Meter
ID df temp. limits cat.# price
0.25 mm 0.25 µm -20 to 310/330 °C 11223
0.32 mm 0.50 µm -20 to 310/330 °C 11239
0.53 mm 0.83 µm -20 to 310/330 °C 11240