溴化衍生-液液萃取-气相色谱法检测水中的丙烯酰胺

Determination of acrylamide in water by brominating derivation-liquid/liquid extraction-gas chromatorgraphy.

在pH=1～2条件下,水中的丙烯酰胺与新生溴发生加成反应,生成衍生产物2,3-二溴丙烯酰胺,经乙酸乙酯液液萃取后,通过气相色谱-微电子捕获检测器检测。结果表明,2,3-二溴丙烯酰胺的线性范围为1～13μg/L,r=0.9936,检出限为1μg/L。单体丙烯酰胺在0.1、0.2、0.4、0.5、1μg/L水平下,回收率为61.6%～112%,RSD为5%～9.49%。

Under the condition of pH=1-2, acrylamide in water reacted with bromine, the product （2,3-dibromopro-pionamide） was extracted with ethly acetate and determined by gas chromatography with μECD. The linear range for 2,3-dibromopro-pionamide was 1-13μg/L, r =0. 9936, and the detection limit was 1μg/L. Recoveries of acrylamide spiked at levels of 0.1, 0.2, 0.4, 0.5, 1μg/L were between 61.6- to 112%. The relative standard deviations were 5%-9.49%（n=6）.