食品中铅、镉、锰、钢和铬的测定是食品卫生监测的常作项目。目前主要采用酸消化或高温灰化样品,化学法测定,比较耗时。本文介绍以磷酸为基体改进剂,用石墨炉原子吸收(AAS)直接进样测定食品样品中上述五个元素,对于能与水互溶的液体样品,易溶于水的固体样品以及用水制成悬 Determination of lead, cadmium, manganese, steel and chromium in foods is a regular item of food hygiene monitoring. Currently mainly used acid digestion or high temperature ashing samples, chemical determination, more time-consuming. In this paper, phosphoric acid as a matrix modifier is introduced. The five elements in food samples are determined by direct injection with graphite furnace atomic absorption spectrometry (AAS). For liquid samples that can be miscible with water, solid samples that are easily soluble in water, and suspended in water