平台石墨炉原子吸收法测定饲料中痕量硒  

DETERMINATION OF SELENIUM BY PLATFORM GRAPHITE FURNACE ATOMIC ABSORPTION SPECTROMETRY

作　　者：谢文兵[1] 姚金玉[1] 马戈 

机构地区：[1]中国科学院长春应用化学研究所国家电化学和光谱研究分析中心

出　　处：《光谱学与光谱分析》1998年第6期700-702,共3页Spectroscopy and Spectral Analysis

摘　　要：研究了基体改进剂及其用量，硒的最佳灰化温度和原子化温度，以及共存元素的干扰。结果表明，用钯和钙作混合基体改进剂，不仅可以明显消除共存元素的干扰，而且还能大大提高硒的灰化温度和灵敏度。用平台石墨炉原子吸收法直接测定饲料中痕量硒，特征量为３９ｎｇ，检出限为０．１１μｇ／ｇ，相对标准偏差为４．９～７．７％，回收率为９２～１００％。The matrix modifier and its amount,the ashing or atomization temperature of selenium and interference experiment are investigated.The experimental result shows that the application of Pd Ca as mixed matrix modifier not only reduces interference but also enhances ashing temperature and increases sensitivity.The method can be used directly for the determination of selenium in cereal by platform graphite furnace atomic absorption.The characteristic mass is 39 ng,the detection limit is 0 11μg/g,the relative standard deviation is 4 9—7 7% and the recovery is 92—100%

关 键 词：平台石墨炉 饲料 痕量 硒 原子吸收光谱 测定 

分 类 号：S816.17[农业科学—饲料科学]