电感耦合等离子体发射光谱法同时测定工业盐中的11种元素

Simultaneous determination of eleven elements in industrial salt by inductively coupled plasma atomic emission spectrometry

建立了电感耦合等离子体发射光谱法测定工业盐中的硅、钙、镁、铁、钾、铝、钡、锶、锰、铅和镍11种杂质元素的含量。采用硝酸溶液、氢氟酸溶液和水溶解样品,采用耐氢氟酸惰性进样系统直接进样。在最佳实验工作条件下,11种杂质元素在各自的检测范围内线性关系良好,相关系数均大于0.999,方法的检出限为0.01～4.00 ng/mL。测定结果的相对标准偏差为2.35%～8.72%(n=11),样品加标回收率为88.6%～105.1%。该方法操作简便,测定结果准确、可靠,稳定性好,适用于工业盐中11种杂质元素的测定。

A method for the determination of 11 elements of silicon, calcium, magnesium, iron, potassium, aluminum, barium, strontium, manganese, lead and nickel in industrial salt by inductively coupled plasma atomic emission spectrometry was established. Samples were dissolved in nitric acid, hydrofluoric acid and water. Direct injection was carried out by inert injection system with hydrofluoric acid. Under the optimum experimental conditions, the 11 impurity elements had good linearity in the detection ranges. The correlation coefficients were more than 0.999, and the detection limits were 0.01–4.00 ng/mL. The relative standard deviations of the result were 2.35%–8.72%（n=11）, and the recoveries of standard addition were 88.6%–105.1%. The method is simple, accurate, reliable and stable. It is suitable for the determination of 11 impurity elements in industrial salt.