电感耦合等离子体发射光谱(ICP-OES)法测定橘子汁中钙和镁

Determination of Ca and Mg in Orange Juice by ICP-OES

建立了微波消解和湿法消解对样品进行前处理,电感耦合等离子体发射光谱法(ICP-OES)测定橘子汁样品中钙和镁含量的方法。选择Ca 317.933nm,Mg 285.213nm作为钙和镁的分析线。实验结果表明,钙和镁的检出限分别为0.001 8和0.000 4mg/L,相对标准偏差(RSD<2%),加标回收率为99%~101%,用来测定FAPAS国际比对橘子汁样品,反馈的统计结果显示钙和镁元素的Z值分别为-0.3和0.3,结果均为满意。方法快速、简单、精确,适于橘子汁中钙和镁的测定。

An atomic emission spectrometry(ICP-OES)method based on microwave digestion and wet digestion was established for determination of Ca and Mg content in orange juice.The Ca 317.933 nm line was selected for Ca content and Mg 285.213 nm line was chosen for Mg content measurement.The results showed that the limit of detection of Ca and Mg was 0.001 8 and 0.000 4 mg/L,respectively.The relative standard deviations(RSD)of Ca and Mg were less than 2%and the recoveries ranged between 99%~101%.The method was applied in the FAPAS test for orange juice.The feedback statistics showed satisfactory results with Z-score of Ca and Mg were-0.3 and 0.3,respectively.The presented method is simple and accurate for determining Ca and Mg content measurement in orange juice.