超声波提取-气相色谱法测定海产品中的多氯联苯

本研究探讨了影响超声波提取海产品中多氯联苯的因素，包括提取温度、时间、功率、液料比和层析条件。根据结果选择的优化超声波条件为：温度40℃，超声波功率540W，时间120min，液料比7:1；层析时淋洗液的起始收集体积为10ml，共收集10ml。样品中的多氯联苯用气相色谱法测定。在选定条件下，方法对多氯联苯的回收率在72.66%～91.56% 之间，平均值87.93%。研究还用样品对选定方法进行了验证，结果表明，本研究所建立的方法可行。

Determination of Polychlorinated Biphenyls in Sea Products Using Gas Chromatography Combined with Ultrasonic Extraction

Parameters affecting the ultrasonic extraction of polychlorinated biphenyls (PCBs) from sea products, including temperature, time, power and liquid (n-hexane) to solid ratio, and effluent collection in column chromatography were investigated. Based on experimental results, the following conditions were chosen: extracting sample at 40 ℃ at 540 W for 120 min with the liquid to solid ratio of 6:1; beginning to collect the effluent up to 10 ml when there was 10 ml of effluent flowing out of silica gel column. The PCBs in the extract were quantified using gas chromatography. The recovery rates of PCBs in this method range between 72.66% and 91.56%, and the average is 87.93%. This method was also used to analyze sea products such as hairtail, butterfish and shrimp. The results proved that the established method is reliable.