石墨炉原子吸收光谱法测定食品中镍  

Determination of nickel in food by graphite furnace atomic absorption spectrometry

作　　者：刘楠[1] LIU Nan(Sanmenxia city disease prevention and control center,Henan 472000,China)

机构地区：[1]三门峡市疾病预防控制中心,河南三门峡472000

出　　处：《河南预防医学杂志》2018年第10期746-748,共3页Henan Journal of Preventive Medicine

摘　　要：目的通过研究食品安全风险监测中镍分析的特点、建立有效和准确的石墨炉原子吸收光谱法测定食品中镍的检测方法。方法采用微波消解、湿法消解两种前处理方式消解样品,加入磷酸铵、磷酸二氢铵和钯盐等基体改进剂消除样品干扰、优化仪器条件进行石墨炉原子吸收光谱法测定食品中镍。结果测定镍的最佳基体改进剂分别为磷酸二氢铵、钯盐+磷酸二氢铵混合基体改进剂。两种前处理方式的加标回收率和精密度无显著性差异。本方法测定镍的定量限(LOQ)为2.9μg/L,线性范围为0~60μg/L,加标回收实验的回收率在91.6%~109.3%之间。结论该方法准确、可靠、灵敏度和精密度高,可满足食品中镍的风险监测要求。objective to establish an effective and accurate method for determination of nickel in food by studying the characteristics of nickel analysis in food safety risk monitoring.Methods the samples were dissolved by microwave digestion and wet digestion, and the nickel in food was determined by graphite furnace atomic absorption spectrometry with the addition of matrix modifier such as ammonium phosphate, ammonium dihydrogen phosphate and palladium salt to eliminate sample interference.Results the optimal matrix modifier for nickel determination was ammonium dihydrogen phosphate, palladium salt and ammonium dihydrogen phosphate.There was no significant difference in the rates of standard recovery and precision between the two pretreatment methods.In this method, the quantitative limit（LOQ） of nickel was2.9 μg/L, and the linear range was 0 to 60 μg/L.The recovery rate of the experiment was between91.6 % and 109.3 %.Conclusion this method is accurate, reliable, sensitive and precise, and can meet the risk monitoring requirements of nickel in food.

关 键 词：食品 镍 石墨炉原子吸收光谱法 

分 类 号：R155.5[医药卫生—营养与食品卫生学]