微波溶样──石墨炉原子吸收法测定鸡蛋中的铬

Determination of Trace Amount Chromium in Eggs with Microwave Process System by Graphite Furnace Atomic Absorption Spectrometry

测定食品中微量铬时，传统的预处理方法有干法灰化和硫酸──过氧化氢氧化法[1]，前者炭化时间长，耗时耗电，后者需大量试剂，产生的酸雾污染环境，且少量的油脂不易被消化完全。本文利用微波消解鸡蛋，并对几种处理方法造成的结果差异进行了比较，发现利用微波技术消化样品：简单快速、省试剂、少污染。利用石墨炉原子吸收法测铬，检出限7.9×10－11g/ml，相对标准偏差2.3％(n=10)，回收率96.0％－101.0％，结果满意。

In order to determine Chromium in foods conventional solution method was cineration or oxidation in H2SO4－H2O2.Cineration cost long time and much power while oxidation needed a lot of agents.These methods heavy Produce acid fog.The environment was pollutd.and somelipid could nof be digested thorougly.In this paper weredig ested and treated eggs with microwave,and the test results were compared.The results showed that this method of processing eggs with microwave was rapid,and convenient.The determination limit of Cr was 9.7×10－11g.ml－1，the relative standard deviation(RSD)(n=10) was 2.3％and the recovery rate was 96.0％－101.0％.