The content of Hohhot mainly large supermarket and farmers markets 7 kinds of heavy metals in a sample of 28 in Pb was determined. The content of lead in the samples was determined using graphite furnace atomic absorption spectrometry. The pre-digestion was added on the basis of the microwave digestion method.As a result,used pre-digestion-microwave digestion, the anise's recovery rate was 97.2%-99.3%,cinnamon's re-covery rate was 99.7%-99.9%,pepper powder's recovery rate was 99.9%-100.2%;used microwave diges-tion, the anise's recovery rate was 95.0%-96.5%,cinnamon's recovery rate was 99.5%-99.7%,pepper pow-der's recovery rate was 99.4%-99.8%.Pre-digestion-microwave digestion had digested completely, thorough-ly, and high recovery rate than microwave digestion method.%对呼和浩特大型超市以及农贸市场采购的家庭常用香辛料7个品种28个样品进行了重金属铅的含量测定。采用石墨炉原子吸收分光光度法测定铅含量，在微波消解法的基础上添加了预消解。结果经过预消解-微波消解，原子吸收分光光度法测定，计算出八角的回收率范围为97.2%~99.3%，桂皮的回收率范围为99.7%~99.9%，花椒粉的回收率范围为99.9%~100.2%；经过微波消解，原子吸收分光光度法测定，计算出八角的回收率范围为95.0%~96.5%，桂皮的回收率范围为99.5%~99.7%，花椒粉的回收率范围为99.4%~99.8%。预消解-微波消解法比微波消解法具有消化的完全、彻底，回收率高等优点。
展开▼
