Organophosphorus Pesticides U.S. EPA Method 8141A on Rtx-OPPesticides2

	Peaks
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

Injection
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)
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.

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