日用陶瓷铅镉溶出量的测定.doc

摘要：采用火焰原子吸收分光光度法来测定日用陶瓷中铅、镉的溶出量以及浸泡时间长短对溶出量的影响。结果表明：Pb和Cd的检出限分别为0.5076 μg/mL和0.9328 μg/mL，回收率分别为104.13%和101.23%，精密度为2.27%和1.01%。该方法灵敏度准确、快速、检出限低，具有良好的精密度和准确度，适合用于实验室中微量铅、镉溶出量的测定。

关键词：火焰原子吸收分光光度法；日用陶瓷；铅；镉 

Abstract:The contents of Pb and Cd in domestic ceramic was determined by flame atomic spectrometry. The result showed that the limits of detection of Pb and Cd were 0.5026 μg/mL and 0.0095 μg/mL respectively. The reccoveries were 104.13% (Pb) and 101.23% (Cd) and RSDs were 2.27%(Pb) and 1.01%(Cd)，respectively. The method was sensitive, accurate,rapid and low actection limits, and suitable for trace Pb and Cd examination in laboratory.

Key words: flame atomic absorption spectrometry; domestic ceramic; Lead; Cadmium

　　　目前，陶瓷器皿中铅、镉溶出量的测定方法有分光光度法、示波极普法、原子荧光法、阳极溶出伏安法、原子吸收法等[5-8]。原子吸收法具有较高的灵敏度，精密度高，检出限低，选择性好，主要针对单元素的分析，是我国目前测定单一重金属含量的最主要的方法[8]。所以本实验设计采用火焰原子吸收分光光度法来测定日用陶瓷中铅镉的溶出量。