Volatiles US EPA Method 624 on Rtx-624

Oven
Column	Rtx-624, 40 m, 0.18 mm ID, 1.00 µm (cat.# 40925)
Standard/Sample	624 Internal Standard Mix (cat.# 30023)
	624 Surrogate Standard Mix (cat.# 30243)
	Volatiles MegaMix, EPA Method 624 (cat.# 30497)
Conc.:	compounds at 50 ppb (IS @ 40ppb) in 5mL of RO water
Injection	purge and trap split (split ratio 40:1)
Inj. Temp.:	250 °C
Purge and Trap
Instrument:	Tekmar LSC-3100 Purge and Trap
Trap Type:	Vocarb 3000 (type K)
Purge:	11 min @ ambient, flow 40 mL/min
Dry Purge:	1 min, flow 40 mL/min
Desorb Preheat Temp.:	245 °C
Desorb:	2 min @ 250 °C, flow 10 mL/min
Bake:	8 min @ 260 °C
Interface Connection:	injection port
Transfer Line Tubing:	Silcosteel transfer line, 1mm ID sleeve
Oven Temp.:	50 °C (hold 4 min) to 100 °C at 12 °C/min to 230 °C at 27 °C/min (hold 2 min)
Carrier Gas	He, constant flow
Flow Rate:	1.1 mL/min
Dead Time:	2.06 min @ 50 °C

Detector	Agilent 5971A GC/MS
Transfer Line Temp.:	280 °C
Analyzer Type:	Quadrupole
Tune Type:	PFTBA/BFB
Ionization Mode:	EI
Scan Range:	35-260 amu
Notes	(MCS bypassed using Silcosteel tubing)

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