摘要
目的：建立微波消解-石墨炉原子吸收法测定面粉中镉和钴含量的方法。方法：采用微波消解法对样品进行前处理，并以1000mg／L PdCl2和1％的Vc溶液5μl作为基体改进剂，经氘灯校正背景，利用石墨炉原子吸收法对样品中镉、钴的含量进行测定。结果：微波消解法对样品进行前处理，减少了消化过程中元素的损失，其回收率分别在98．1％-106．5％和97．2％～102．6％之间，方法的相对标准偏差分别为4．5％和5．1％，检出限分别为0．50和1．60ng／ml。结论：具有简便、快速、灵敏、稳定、准确等优点，适于面粉中镉、钴的分析测定。
Objection：To set the means that trace cadmium and cobalt in flour with graphite furnace atomic absorption spectroscopy and microwave digest. Methods：We fore -treat the samples by microwave digest firstly, then take the PdCl2 of 1000 mg/ L and 5 μl Vc of 1% as the matrix modifier, and rectifying background by Deuterium light. At last determine the content of cadmium and cobalt in flour with graphite furnace atomic absorption spectroscopy. Results： We reduce the loss of the elements by the way that do the fore - treat to samples with microwave digest. The recovery is in the range of 98. 1% - 106. 5% and 97. 2% - 102. 6%. The relative standard deviation of the method is 4. 5% and 5. 1%. The limit of detection is 0. 50 ng/ml and 1.60 ng/ ml. Conclusion：The method is suitable for the determination of trace cadmium and cobalt in flour of being simple, rapid, sensitive, stable and accurate etc. , and the results were satisfactory.
出处
《中国卫生检验杂志》
CAS
2008年第11期2277-2278,2284,共3页
Chinese Journal of Health Laboratory Technology
关键词
微波消解
石墨炉原子吸收
面粉
镉
钴
Microwave digest
Graphite furnace atomic absorption spectroscopy
Flour
Cadmium
Cobalt
