摘要
建立了一种微波消解、氢化物发生-原子荧光光谱法同时测定罐头食品中汞和锡的方法。研究了测定汞、锡时介质的酸度和硼氢化钾的用量对汞、锡测定的影响。优化了样品消解和测定的条件,采用硫脲-抗坏血酸为掩蔽剂,以酒石酸为载流,消除了影响锡测定的干扰因素。汞和锡的检出限、相对标准偏差、回收率分别为：0.005μg·L^-1和0.20μg·L^-1;5.0%～6.5%和4.0%～7.3%;93.0%～101.0%和92.5%～94.0%。
HG-AFS was applied to the simultaneous determination of tin and mercury in canned food. Effects of acidity and concentration of KBH4 solution on the hydride forming reaction, suitable conditions for the acid digestion of sample and the working condition of the instrument were studied and optimized. Mixed solution of thiourea and ascorbic aicd was used as masking agent and tartaric acid solution was used as carrying solution to eliminate interferences of some coexisting substances, especially in the determination of arsenic. Detection limits （3S） of this method were found to be 0. 005 μg · L^-1 for mercury, and 0. 20 μg · L^-1 for arsenic. Precision of this method was tested at the concentration level of 2 μg · L^-1 of mercury and 20 μg · L^-1 of tin, and the values of RSD＇s （n：12） found were in the ranges of 5. 0%-6. 5% （for Hg） and 4. 0%-7. 3% （for As）. Results of recovery test were found in the ranges of 93. 0%-101.0% for mercury and 92.5%-94.0% for arsenic.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2007年第3期185-186,190,共3页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
关键词
原子荧光光谱法
微波消解试样
汞
锡
罐头食品
Atomic fluorescence spectrometry
Microwave assisted sample digestion
Mercury
Arsenic
Canned food
