微波辅助提取-电感耦合等离子体质谱法测定海产品中总有机锡

Determination of Total Organotin in Seafood by Microwave-Assisted Extraction-Inductively Coupled Plasma-Mass Spectrometry

建立了微波辅助提取-电感耦合等离子体质谱法(MAE-ICP-MS)测定海产品中总有机锡含量的方法。以丙酮-正己烷(体积比3∶1)为溶剂,微波辅助提取海产品中的有机锡,采用ICP-MS测定。微波提取条件如提取剂用量、溶剂比例、提取温度及提取时间采用正交设计进行优化。方法检出限为0.47ng/g,平均加标回收率为92.7%～106%,相对标准偏差(RSD)在1.18%～2.38%之间。该法可应用于虾米、淡菜、海砺干、蛤砺干、海星等海产品中总有机锡的测定。

A method for the determination of total organotin in seafood by microwave-assisted extractioninductively coupled plasma-mass spectrometry（MAE-ICP-MS） has been developed. The total organotin was extracted with acetone-hexane（3：1 ,V/V） by microwave-assisted extraction technique, then analyzed by ICP-MS. Microwave extraction conditions such as volume of extraction solvent, proportion of extraction solvent, extraction temperature and extraction time were optimized by an orthogonal array experimental design. The detection limit was 0. 47 ng/g, the average recoveries were in the range of 92.7%-106% with relative standard deviations of 1. 18%-2. 38G. The proposed procedure has been successfully applied to the determination of total organotin in several seafoods with satisfactory results.