Han Feng, Meng Zhuoran, Liu Yiqun, Sun Licui, Xie Ke, Huang Zhenwu
Wei Sheng Yan Jiu. 2016 Jan;45(1):76-80.
A novel method for quantitative analysis of multi-elements (Ca, Fe, K, Na, Cu, Mn, Zn, Mg, Ni, Sr, Cr, Cd and Co) in food was established by using microwave plasma-atomic emission spectrometry (MP-AES).
Samples were digested with HNO3 and H2O2 followed by dilution with ultrapure water to 25 mL (g), and then analyzed directly by MP-AES.
In the optimal conditions, the linear calibration curve was established for each element, and the linear regression correlation coefficient was more than 0.9999. The limit of detection (LOD) of these multi-elements varied from 0.04 μg/kg to 3.90 μg/kg. The spiked recovery was between 89.8% and 110.4% . The relative standard deviation of precision measurement was between 1.33% and 3.85%. The accurate and reliable results were obtained for validation of the MP-AES method with food reference material according to the standard reference materials (Nist 1549, Nist 1567, Nist 1568 and Nist 1570) and national standard (GBW08501 and GBW10051), and the measured values were in good agreement with the certified values.
The established method is accurate, simple, fast, reproducible and environmentally friendly.
建立一种利用微波等离子体原子发射光谱法（MP-AES）对食品中多种元素（钙、铁、钾、钠、铜、锰、锌、镁、镍、锶、铬、镉和钴）进行定量分析的新方法。
样品用硝酸和过氧化氢消化，然后用超纯水稀释至25 mL（g），接着直接用MP-AES进行分析。
在最佳条件下，为每种元素建立了线性校准曲线，线性回归相关系数大于0.9999。这些多元素的检测限在0.04 μg/kg至3.90 μg/kg之间。加标回收率在89.8%至110.4%之间。精密度测量的相对标准偏差在1.33%至3.85%之间。根据标准参考物质（Nist 1549、Nist 1567、Nist 1568和Nist 1570）和国家标准（GBW08501和GBW10051），用食品标准物质对MP-AES方法进行验证，获得了准确可靠的结果，测量值与认定值吻合良好。
所建立的方法准确、简单、快速、可重现且环保。
