食品科学2012，Vol.33Issue(24)：260-262,3.
微波消解-火焰原子吸收光谱法测定食品中痕量镍
Determination of Trace Nickel in Foods by Microwave Digestion Followed by FAAS
摘要
Abstract
A microwave digestion-flame atomic absorbance spectrometry (FAAS) method was developed to determine trace nickel in foods. The optimal microwave digestion conditions were established as follow: concentrated nitric acid-hydrogen peroxide (4:1,V/V) as digestion solution, digestion time 15 min, and digestion pressure 1.5 MPa. Meanwhile, the optimal solvent medium, activator and instrumental conditions were determined. When present in pH 4.7 acetic acid-sodium acetate buffer, activated by NP-10, the relationship between absorbance and nickel concentration over the range of 3.1 × 10-6– 4.8×10-4 g/L as detected under optimized instrumental conditions obeyed Beer’s law. The detection wavelength was set at 232.6 nm. The limit of detection of this method was 3.1 × 10-6 g/L. The maximum precision RSD for 5 replicate determinations of nickel in cereal grains was 4.2% and average spike recoveries ranged from 95.1% to 106.4%. Compared with the method of GB/T 5009.138-2003, the maximum relative error was not higher than 5.8%.关键词
镍/微波消解/火焰原子吸收光谱法/活化剂Key words
nickle/microwave digestion/lfame atomic absorbance spectrometry/activator分类
农业科技引用本文复制引用
赵丽杰,赵丽萍,李良,杨旭鹏,陈宏,刘永宏..微波消解-火焰原子吸收光谱法测定食品中痕量镍[J].食品科学,2012,33(24):260-262,3.基金项目
辽宁省科学技术基金项目(20061020) （20061020）
