ICP-AES法测定硝酸钾中钙、镁、硫

Determination of Calcium,Mgnesium and Sulfur in Potassium Nitrate by ICP-AES

实验建立一种采用电感耦合等离子体原子发射光谱仪(ICP-AES)测定硝酸钾中钙、镁、硫含量的方法。样品经过简单稀释后即可测试,元素检出限为0.04 mg/L^0.38 mg/L,加标回收率为95.04%~104.76%,相对标准偏差RSD<3.3%,方法简单快捷,精密度好,准确定高,适用于工农业用硝酸钾中钙、镁、硫的测定。

A method was developed to determine Ca,Mg and S in potassium nitrate by ICP - AES. The sample can be determined after simply diluting with water. The limit of element detection was O. 04 mg/L -0.38 mg/L, the recovery was between 95.04% and 104.76% , and the relative standard deviation was less than 3.3%. The method was simply and rapid with great precision and high accuracy, which can be used to analyze Ca, Mg and S in potassium nitrate.