GC-MS Determination of 34 Volatile Organic Compounds in Atmosphere with Preconcentration System

GC-MS was applied to the determination of 34 volatile organic compounds in atmosphere with preconcentration system.The air sample was collected with SUMMA canisters,and preconcentration system was employed to have the analytes concentrated.DB-624 chromatographic column was used for GC separation and full-scanning mode was adopted in MS determination.Linearity ranges of the 34 volatile organic compounds were 0.5-40 nL·L-1,with detection limits in the range of 0.01-0.14 μg·m-3.Values of recovery found by standard addition method were in the range of 86.7%-98.7%,and values of RSD′s (n=6) in the range of 2.5%-8.6%.