Wei Yi Hua, Zhang Jin Yan, Zhang Da Wen, Luo Lin Guang, Tu Tian Hua
Institute for Quality & Safety and Standards of Agricultural Products Research, Jiangxi Academy of Agricultural Sciences, Nanlian Road 602, Nanchang, Jiangxi 330200, China.
Institute for Quality & Safety and Standards of Agricultural Products Research, Jiangxi Academy of Agricultural Sciences, Nanlian Road 602, Nanchang, Jiangxi 330200, China.
Food Chem. 2014 Sep 15;159:507-11. doi: 10.1016/j.foodchem.2014.03.057. Epub 2014 Mar 21.
A quick and accurate method was devised to determine Se, As, Ba, Ca, Cd, Cr, Cu, Fe, Mg, Mn, Ni, Pb, Sr and Zn in Se-rich rice samples by microwave digestion and inductively coupled plasma-mass spectrometry (ICP-MS). Spectral interferences on Se were eliminated using methane as a reaction gas in the dynamic reaction cell (DRC). Rhodium was used as an internal standard to compensate for sample matrix effects. A rice-certified reference material (CRM) (GBW 10010) was used to verify the accuracy of the method. The method detection limits were 0.001-0.03 mg/kg, analyte recoveries were 85-108% and precisions (RSDs) ranged from 2.1% to 5.8%. Correlation analysis showed that the Se concentrations in the Se-rich rice samples correlated well with the Cu concentrations (r=0.53, p<0.05).
建立了一种快速准确的方法，通过微波消解和电感耦合等离子体质谱法（ICP-MS）测定富硒大米样品中的硒、砷、钡、钙、镉、铬、铜、铁、镁、锰、镍、铅、锶和锌。在动态反应池（DRC）中使用甲烷作为反应气体消除了对硒的光谱干扰。铑用作内标以补偿样品基体效应。使用大米认证参考物质（CRM）（GBW 10010）验证该方法的准确性。方法检出限为0.001-0.03 mg/kg，分析物回收率为85-108%，精密度（RSD）范围为2.1%至5.8%。相关性分析表明，富硒大米样品中的硒浓度与铜浓度具有良好的相关性（r=0.53，p<0.05）。
