活性炭超声萃取-毛细管柱气相色谱法测水中痕量丙烯酰胺

摘要

建立了一种活性炭超声萃取-毛细管柱气相色谱联用的方法,对水中痕量丙烯酰胺进行定量分析.通过对乙酸乙酯液液萃取,Agilent ODS-C18固相萃取柱(500 mg,6 mL)萃取以及活性炭超声萃取这三种方法进行了比较与优化,实验结果表明活性炭超声萃取方法对大体积水样的萃取效果最佳,并通过精密度,重现性和加标回收率等实验得到了论证.该方法最低检测限达到0.05/μg/mL,灵敏度高,重现性好,适用于痕量丙烯酰胺的分析.%An ultrasonic extraction of activated carbon-capillary gas chromatography method is established for the determination of trace acrylamide in water by comparing and optimizing ethyl acetate liquid-liquid extraction, agilent ODS-C18 solid phase extraction column (500 mg, 6 mL) extraction with ultrasonic extraction of activated carbon. The results showed that ultrasonic extraction of activated carbon was the best for extraction of water samples generally, which was demonstrated through the precision, reproducibility and recovery experiments. The detection limit of the method was 0. 05 μg/mL.This method is desirable for high sensitivity and good reproducibility, and it can be applied to determine the trace acrylamide.