Florisil SPE Extraction Blank

	Peaks
1.	2,4,5,6-Tetrachloro-m-xylene (SS)
2.	Decachlorobiphenyl (SS)

Injection
Column	Rtx-CLPesticides2, 30 m, 0.32 mm ID, 0.25 µm (cat.# 11324)
	using Rxi guard column 5 m, 0.32 mm ID (cat.# 10039)
	with universal “Y” Press-Tight connector (cat.# 20406-261)
Standard/Sample	2,4,5,6-Tetrachloro-m-xylene (cat.# 32027)
	Decachlorobiphenyl (BZ #209) (cat.# 32029)
Diluent:	Hexane
Conc.:	10 ng/mL
Inj. Vol.:	2 µL splitless (hold 0.75 min)
Liner:	Premium 4 mm single taper w/wool (cat.# 23303.5)
Inj. Temp.:	250 °C
Purge Flow:	50 mL/min
Oven
Oven Temp.:	110 °C (hold 0.5 min) to 320 °C at 15 °C/min (hold 5 min)
Carrier Gas	He, constant flow
Flow Rate:	3.5 mL/min

Detector	µ-ECD @ 330 °C
Make-up Gas Flow Rate:	50 mL/min
Make-up Gas Type:	N₂
Data Rate:	50 Hz
Instrument	Agilent/HP6890 GC
Sample Preparation	SPE: Condition Florisil tube (cat.# 24034) with 6 mL hexane. Elute with hexane:acetone (90:10), collecting 10 mL. Concentrate to 1 mL.

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