饮料中铅含量测定,无法直接用火焰原子吸收光谱法测出其含量。因为饮料中铅含量低于仪器检出浓度,故必须预富集。氢氧化镁胶状沉淀能同时共沉淀一些重金属离子,在梨形分液漏斗内产生共沉淀,然后将沉淀从漏斗下部分离出来。以此达到富集目的。方法简便,富集效果好。经试验,方法相对标准偏差为6.47％,回收率在90.5％～112％,检出限为0.05mg·L~(-1)。 Determination of lead content in beverages, can not be directly measured by flame atomic absorption spectrometry content. Because the content of lead in beverages is lower than that detected by the instrument, it must be pre-enriched. Magnesium hydroxide gel-like sediment co-precipitation of some heavy metal ions, pear-shaped separatory funnel produced coprecipitation, and then separated from the bottom of the funnel separated. In order to achieve the purpose of enrichment. The method is simple and the enrichment effect is good. The test method, the relative standard deviation of 6.47%, the recovery rate of 90.5% ~ 112%, the detection limit of 0.05mg · L -1.