动态顶空气相色谱法测定水中极性水溶性有机物

采用动态顶空气相色谱FID法测定水中乙醛、丙酮、甲醇、丙烯醛、丙烯腈、乙腈、吡啶等7种极性水溶性有机物，通过优化动态顶空条件，使该方法在0．157mg／L～7．92mg!L之间线性良好。方法检出限在0．008mg／L～0．048mg／L之间，空白水样的加标回收率为103％～111％，RSD为5．4％～8．7％。用该方法测定某制药企业排口污水和地表水，只有污水中甲醇、乙腈、吡啶有响应值。

Determination of Polarity Water-soluble Organic Compounds in Water by Method of Dynamic Headspace Gas Chromatography

Dynamic headspace gas chromatography equipped with FID was applied to test the acetaldehyde, acetone, methanol, acrolein, acrylonitrile, acetonitrile and pyridin in water. The dynamic headspace conditions were optimized. The method had good linearity from 0. 152 mg/L to 7.92 mg/L. The method detection limits were between 0. 008 mg/L and 0. 048 mg/L. The spiked recovery in blank water ranged from 103% to 111% , with the RSDs 5.4% ~ 8.7%. This method was used to test wastwater of some pharmaceutical enterprise and surface water. Only methanol, acetonitrile and pyridin were detected in wastwater.