Abstract:

Conditions of platform graphite furnace atomic absorption spectrometry linking microwave digestion were determined by optimizing solvent and conditons of microwave digestion.The results showed that HNO3+HClO4+H2O2 was the best solvent of microwave digestion.The solvent could eliminate the effect of matrix in presence of matrix modifier Mg(NO3)2 and Pd(NO3)2.The concentration of selenium and peak area was linear correlation between 5~100 ng/mL(r=0.999
2).Detection limit was 0.53 ng/mL,and the reclaim ratio w...

Key words: feeds, GFAAS, microwave digestion technique, trace selenium;

摘要：

通过优化消解溶剂和微波条件,确定了微波消解-平台石墨炉原子吸收法的测定条件。结果表明,以HNO3+HC lO4+H2O2作为微波消解溶剂最佳,在基体改进剂Mg(NO3)2和Pd(NO3)2存在下,可有效地消除基体的影响。建立的微波消解-平台石墨炉原子吸收光谱法测定饲料中硒的方法,硒浓度线性范围为5~100 ng/mL(r=0.999 2),检出限为0.53 ng/mL,回收率为88.7%~106.3%,RSD为5.9%。同时,用该检测方法测定饲料中硒具有较高的可操作性。

关键词: 饲料 石墨炉原子吸收光谱法 微波消解 微量硒