大口径毛细管柱气相色谱法直接测定工作场所空气中丙烯酰胺

以水为吸收液采集工作场所空气样品中的丙烯酰胺,采用大口径毛细管柱气相色谱法直接测定吸收液中丙烯酰胺的含量,采用HP-INNOWAX色谱柱(30m×0.53mm,1.00μm)分离,氢火焰离子化检测器检测。丙烯酰胺的质量浓度在0.050~3.00mg·L^-1内与其对应的峰面积呈线性关系,检出限(3S/N)为0.014mg·L^-1。对丙烯酰胺标准溶液进行测定,测定值的日内相对标准偏差(n=6)为1.0%~2.1%,日间相对标准偏差(n=6)为1.3%~2.2%。以空白样品为基体进行加标回收试验,所得回收率为93.0%~102%。

Direct Determination of Acrylamide in Workplace Air by GC with Wide Bore Capillary Column

Acrylamide in workplace air sample was collected by water as absorbent.GC with wide bore capillary column was applied to the direct determination of acrylamide in the absorbent.The analyte was separated on HP-INNOWAX chromatographic column(30 m×0.53 mm,1.00μm)and detected by FID.Linear relationship between values of peak area and mass concentration of acrylamide was kept in the range of 0.050-3.00 mg·L^-1,with detection limit(3 S/N)of 0.014 mg·L^-1.Acrylamide standard solution was tested,giving values of intra-day RSDs(n=6)and inter-day RSDs(n=6)of determination values in the ranges of 1.0%-2.1%and 1.3%-2.2%,respectively.On the base of blank sample,test for recovery was made by standard addition method;values of recovery found were in the range of 93.0%-102%.