Inductively coupled plasma-atomic emission spectrometric determination of major and micro elements in niobium alloys

A new method was worked out for the determination of major and micro elements including Hf,Zr,Ti,Ta and W in niobium alloys by inductively coupled plasma-atomic emission spetrometry(ICP-AES).The samples was dissolved in a mixture of nitric and hydrofluoric acid.The effect of acid concentration,choice of analytical spectral lines for elements ,background corrections,interferences from matrix and among elements determined were investigated. The optimal detection conditions were determined.The spectral interferences of matrix element niobium with the spectral lines of elements determined were corrected by the matrix matching and background correction methods. The analysis of hafnium was achieved by the multi-elemental spectral lines average method.The recoveries for the elements were in the range of 97.0%-105.7% and relative standard deviations were below 1.50 %. The analytical results of the method were in good agreement with those of XRF and chemical methods .It has been applied to product analysis.