电感耦合等离子体质谱法测定话梅中11种微量元素

Determination of 11 kinds of trace elements in preserved plum by inductively coupled plasma mass spectrometry

中文关键词:  话梅  微量元素  微波消解  电感耦合等离子体质谱

英文关键词:preserved plum  trace element  microwave digestion  inductively coupled plasma mass spectrometry

中文摘要:

      目的 建立电感耦合等离子体质谱法(inductively coupled plasma mass spectrometry, ICP-MS)测定话梅中V、Cr、Co、Ni、Cu、Zn、As、Sr、Cd、Ba和Pb共11种微量元素的分析方法。方法 样品经微波消解, 用ICP-MS同时测定11种元素的含量, 测定值采用SPSS 16.0进行Pearson相关性分析。结果 11种元素在0~500 μg/L范围内线性关系良好, 相关系数均大于0.9997, 检出限为0.002~0.01 mg/kg, 加标回收率为84.5%~110.3%, 相对标准偏差小于5%。国家标准物质胡萝卜(GBW10047)测定结果基本在标准认定值范围内。所测样品中元素平均含量从高到低排序为: Sr>Zn>Cu>Ba>Ni>Cr>Pb>V>As>Co>Cd。相关性分析显示所测元素中部分元素间有一定的相关性。结论 该法简单、快捷、可靠, 适合于话梅中微量元素的测定, 测定结果可为话梅的质量控制提供技术依据。

英文摘要:

      Objective To establish a method for determination of 11 kinds of trace elements, including V, Cr, Co, Ni, Cu, Zn, As, Sr, Cd, Ba and Pb in preserved plum by inductively coupled plasma-mass spectrometry (ICP-MS). Methods The samples were digested by microwave system and the content of 11 elements were simultaneously determined by ICP-MS. The measured values were analyzed by Pearson correlation analysis using SPSS 16.0 software. Results Eleven kinds of trace elements had good linear relationships in the range of 0- 500 μg/L with the correlations higher than 0.9997. The limits of detection were 0.002-0.01 mg/kg. The recoveries of standard addition ranged from 84.5% to 110.3%, and the relative standard deviations were lower than 5%. The results of the national standard substance (Carrot GBW10047) were basically within the range of certified values. The order of the element average contents in the samples was: Sr>Zn>Cu>Ba>Ni>Cr>Pb>V>As>Co>Cd. The correlation analysis showed that there were certain correlations between some elements. Conclusion This method is sample, rapid and reliable, which is suitable for determination of trace elements in preserved plum. The measured results can provide technology basis for the quality control in preserved plum.