饮料是食品卫生监督检验的常测样品,饮料中的砷、铅、铜的含量是必测的指标。长期以来样品均采用酸式湿消化或碱式干灰化处理,分别用化学法测定,分析速度慢,方法的灵敏度也较低。近年来出现的基体改进剂石墨炉原子吸收光谱直接测定食品中铅和铜的方法,使分析速度和灵敏度都有了很大提高。但在食品中直接测砷却遇到很大的困难,砷是允许灰化温度最低的元素,在食品样品中,由于有大量有机物的作用,使它更容易损 Beverage is the food hygiene supervision and inspection of the usual samples, drinks, arsenic, lead, copper content is a must-measure index. For a long time the samples were treated with acid wet digestion or alkaline dry ashing, respectively, by chemical method, the analysis speed is slow, the sensitivity of the method is also low. In recent years, the matrix modifier graphite furnace atomic absorption spectrometry direct determination of lead and copper in food methods, the analysis speed and sensitivity have been greatly improved. However, it is very difficult to directly measure arsenic in food. Arsenic is the element that allows the lowest ashing temperature. In food samples, it is more easily damaged due to a large amount of organic matter