电感耦合等离子体发射光谱法测定功能农业农产品中钾、钙、铁、镁、锌的研究

Study on determination of Potassium,Calcium,Iron,Magnesium and Zinc in functional agricultural Products by using inductively Coupled Plasma Atomic Emission Spectrometry

目的建立电感耦合等离子体发射光谱法(inductively coupled plasma atomic emission spectrometry,ICP-AES)同时测定功能农业农产品中钾、钙、铁、镁、锌的方法。方法样品前处理分别采用湿法消解和微波消解,消解液采用电感耦合等离子体发射光谱法进行测定。结果在0.100-10.0 mg/L浓度范围之间呈现良好线性,相关系数r达到0.9999,方法检出限为0.017~0.305mg/L,相对标准偏差RSD为2.5%左右,回收率为97.5%~101.4%之间。结论此方法具有精密度高、稳定性好、回收率高,同时精准测定多个元素等特点,有较好的应用前景。

Objective To establish a method for simultaneous determination of potassium,calcium,iron,magnesium,and zinc in functional agricultural products by using inductively coupled plasma atomic emission spectrometry(ICP-AES).Methods The sample pretreatment adopts wet digestion and microwave digestion respectively,and the digestion solution is determined by inductively coupled plasma emission spectrometry.Results It showed good linearity in the concentration range of 0.100-10.0 mg/L,the correlation coefficient r reached 0.9999,the detection limit of the method was 0.017-0.305 mg/L,the relative standard deviation RSD was about 2.5%,and the recovery rate was between 97.5%~101.4%.Conclusion This method has the characteristics of high precision,good stability,high recovery rate,and accurate determination of multiple elements at the same time,and has good application prospects.