US EPA Method 524.2: GC Analysis of Volatiles on SPB-624 after Purge & Trap using "K" Trap
材料
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标准
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EPA 502/524 挥发性有机物校准混标 A（无气体）
certified reference material, 200 μg/mL each component in methanol, ampule of 1 mL相关产品
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CONDITIONS
sample/matrix
each analyte at 10 ppb in 25 mL water
purge trap
VOCARB 3000 "K" (24940-U)
dry purge
2 min
desorption preheat
205 °C
desorption process
40 mL/min at 210 °C for 2 min
bake
260 °C for 10 min
transfer line/valve temp.
110 °C
sample preparation
purge is 40 mL/min at 25 °C for 11 min
column
SPB-624, 30 m x 0.25 mm I.D., 1.4 μm (24255)
oven
40 °C (2 min), 7 °C/min to 135 °C, 30 °C/min to 230 °C (3 min)
carrier gas
helium, 1.2 mL/min
injection
30:1 split
liner
0.75 mm I.D. SPME
说明
分析说明
Method 524.2 describes the analysis of volatile organic compounds in surface, ground, and drinking water. This application illustrates the analysis of the compounds listed in this method on a 30m x 0.25 mm I.D., 1.4 μm SPB-624 column using purge and trap / GC-MS.