微波消解-石墨炉原子吸收光谱法测定兔皮中的痕量镉  

Study on Determination of Cadmium Content in Rabbits with Microwave Digestion-Graphite Furnace Atomic Absorption Spectrometry

作　　者：吴莲[1] 朱正鑫[1] 王照丽 张宗才[1] 戴红[1] 

机构地区：[1]四川大学制革清洁技术国家工程实验室,成都610065 [2]成都市环境保护科学研究院,成都610065

出　　处：《中国养兔》2012年第3期4-7,共4页Chinese Journal of Rabbit Farming

基　　金：现代农业产业技术体系建设专项资金(CARS-44-D-4)

摘　　要：本试验建立了微波消解-石墨炉原子吸收法测定兔皮中痕量镉的方法。采用微波消解技术,在阶梯升高温度和加热功率条件下,用硝酸和过氧化氢彻底消解兔皮样品,消解后的样品用石墨炉原子吸收分光光度法测定微量的镉。结果:镉浓度在0～60.0μg/L范围内呈良好的线性关系,相关系数镉r=0.999 8;最低检出限镉为0.036 5mg/kg;对样品进行8次重复性实验,其相对标准偏差为3.147%;镉回收率在97.0%～105.8%之间。该方法具有操作简便、测定快速、准确度高的优点,适合于兔皮中痕量镉的日常批量检测。Microwave digestion graphite furnace atomic absorption spectrometry method for determination of cadmium in rabbits was developed.Using microwave digestion technique,under the conditions of step elevating temperature and heating power,rabbit samples were decomposed completely by nitric acid and hydrogen peroxide;then the cadmium was determined by graphite furnace atomic absorption spectrometry.The results showed that there is a good linear relationship in the concentration of 0~60.0 μg /L for cadmium;the correlation coefficient of lead is 0.9998;the detection limit is 0.0365mg/kg.Relative standard deviations of cadmium for 8 replicate determinations of rabbits samples were 3.147%.The recovery rates were 97.0% ～ 105.8%.The proposed method is simple,convenient,fast and accurate,which can be used for daily batch trace determining of cadmium in rabbits.

关 键 词：微波消解 石墨炉原子吸收 兔皮 镉 

分 类 号：S829.1[农业科学—畜牧学]