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应用吹扫捕集-气相色谱-质谱法测定海岸带表层沉积物中28种挥发性有机物的含量。选定在40℃条件下吹扫捕集11min,取样品于吹扫瓶中,利用PTA 3000吹扫捕集仪直接进样,经J&W DB5-MS毛细管色谱柱分离,电子轰击电离全扫描检测,内标法进行定量测定。28种挥发性有机物的方法检出限在0.16～0.38μg.kg-1之间,样品加标回收率在70.7%～115.5%之间,相对标准偏差(n=7)在1.7%～7.8%之间。
Determination of 28 Volatile Organic Compounds in Coastal Surface Sediments by Purge and Trap - Gas Chromatography - Mass Spectrometry. Selected at 40 ℃ under the conditions of purge and trapping 11min, samples were taken in a purge bottle, the use of PTA 3000 purge trap direct injection, the J & W DB5-MS capillary column separation, electron impact ionization full scan detection, Internal standard method for quantitative determination. The detection limits of 28 volatile organic compounds ranged from 0.16 to 0.38 μg · kg-1. The recoveries of spiked samples ranged from 70.7% to 115.5%. The relative standard deviations (n = 7) ranged from 1.7% to 7.8% between.