微波消解–ICP–AES法测定装甲材料中的铌含量

Determination of Niobium Content in a New Type Armor Materials by Microwave Digestion–ICP–AES

建立ICP-AES法测定装甲材料中铌含量的的方法。采用盐酸-硝酸-氢氟酸微波消解样品，检测器为CID固态检测器，检测波长为309.417 nm。在选定的测定条件下，标准工作曲线线性范围为0.005%-1.0%，线性相关系数为0.9997，检出限为0.00068%，测定结果的相对标准偏差不大于3%（n=10），加标回收率为96.0%-98.7%。该方法操作简单，测定结果准确可靠，可用于装甲材料中铌含量的测定。

A method was developed for the determination of niobium content in armor materials by ICP-AES. Sample was digested with hydrochloric acid-nitric acid-hydrofluoric acid by microwave,the detector was CID solid-state detector with the detection wavelength of 309.417 nm. Under the selected conditions of determination, the linear range of curve was 0.005%-1.0%, the linear correlation coefficient was 0.999 7. The detection limit was 0.000 68%. The relative standard deviation of determination results was not more than 3%（n=10）, and the standard addition recovery rate was 96.0%-98.7%. The method is simple in operati on and measurement results are accurate and reliable. It can be used for the determination of niobium content in the armor materials.