黄油中镍含量快速检测方法的研究

Rapid determination of nickel content in butter

中文关键词:  石墨炉原子吸收光谱法  炉内燃烧  镍  油脂

英文关键词:graphite furnace atomic absorption spectrometry  furnace combustion  nickel  grease

中文摘要:

      目的 建立炉内燃烧石墨炉原子吸收光谱法快速测定黄油中镍含量的分析方法。方法 以无水乙醇稀释样品形成均匀溶液, 使石墨炉原子吸收光谱仪的进样系统能够微量准确进样, 加入硝酸钯作为上机测试的基体改进剂, 外标法进行定量分析。结果 本方法建立的标准曲线线性良好, 相关系数为0.9991, 检测限为1.98 μg/L, 回收率在87.9%~98.4%, 相对标准偏差为4.3%(n=6)。结论 该方法操作快速简便, 样品不需要消解, 避免了含高油脂样品经常规消解方法消解时存在的困难和安全隐患, 测试结果准确可靠, 可有效提高工作效率。

英文摘要:

      Objective To establish an analytical method for rapidly determining nickel content in butter by graphite furnace atomic absorption spectrometry with in-furnace combustion Methods The sample was diluted with anhydrous ethanol to form a uniform solution, which enabled the injection system of graphite furnace atomic absorption spectrometer to accurately inject trace amount. Palldium nitrate was added as the matrix modifier for on-machine test, and quantitative analysis was conducted using external standard method. Results The standard curve established by this method had good linearity with the correlation coefficient was 0.9991. The limit of detection was 1.98 μg/L, the recoveries were 87.9%?98.4%, and the relative standard deviation was 4.3% (n=6). Conclusion This method is quick and simple, the sample does not need to be digested, and the difficulty and hidden trouble of the routine digestion method for the sample with high oil content are avoided. The test results are accurate and reliable, which can effectively improve the work efficiency.