Fast Dual Column Analysis of Organochlorine Pesticides (EPA Method 8081) Using a GC Accelerator Kit and Rtx-CLPesticides and Rtx-CLPesticides2 Column Set

Injection
Columns	Rtx-CLPesticides 30 m, 0.32 mm ID, 0.32 µm (cat.# 11141-051)
	and Rtx-CLPesticides2 30 m, 0.32 mm ID, 0.25 µm (cat.# 11324-051)
	using Rxi guard column 5 m, 0.32 mm ID (cat.# 10039)
	with universal angled “Y” Press-Tight connector (cat.# 20403-261)

Standard/Sample	Organochlorine pesticide mix AB #2 (cat.# 32292)
	Pesticide surrogate mix (cat.# 32453)
Diluent:	n-Hexane
Inj. Vol.:	2 µL splitless (hold 0.3 min)
Liner:	Topaz 4.0 mm ID single taper inlet liner w/wool (cat.# 23303)
Inj. Temp.:	250 °C
Purge Flow:	40 mL/min
Oven
Oven Temp.:	120 °C (hold 0.3 min) to 200 °C at 60 °C/min to 230 °C at 25 °C/min to 320 °C at 35 °C/min (hold 1.5 min)
Carrier Gas	H₂, constant flow
Linear Velocity:	90 cm/sec

Detector	Micro-ECD @ 330 °C
Make-up Gas Flow Rate:	60 mL/min
Make-up Gas Type:	N₂
Data Rate:	50 Hz
Instrument	Agilent 7890A GC
Notes	A GC Accelerator oven insert kit (cat.# 23849) was installed in the instrument to speed up analysis. The analytical columns were custom products that were not on cages. This customized format can be obtained from Restek simply by ordering the standard column catalog number and specifying “-051” under special instructions.

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