电感耦合等离子体发射光谱法快速测定硬质合金中的钴、镍、钛、钽、铌、钒、铬

Fast Determination of Cobalt, Nickel, Ttitanium, Tantalum, Niobium, Vanadium, Chromium in Hard Metal by Inductive Coupling Plasma Emission Spectroscopy

采用电感耦合等离子体发射光谱法快速测定硬质合金中的钴、镍、钛、钽、铌、钒、铬。样品用氢氟酸-硝酸在电热消解仪中消解,高纯钨做基体配制标准工作曲线,选择合适的背景校正方法和各元素最佳波长,钛测定选择垂直等离子体观测方式,钴、镍、钽、铌、钒、铬测定选择水平等离子体观测方式,标准曲线法快速测定硬质合金中的钴、镍、钛、钽、铌、钒、铬。质量分数为0.100%-1%时,标准加入回收率为98.8%-113.2%。与国家标准方法X-荧光光谱法比对测定,质量分数为5%-22%时,绝对偏差小于0.3%;质量分数为0.100%-1%时,绝对偏差小于0.1%,小于国家标准方法的允许偏差。方法快速简便,适用于生产分析。

In this article, inductive coupling plasma emission spectroscopy was used to determine cobalt, nickel,titanium, tantalum, niobium, vanadium, chromium in hard metal. The sample was dissolved by hydrofluoric acid and nitric acid in electric heating resolution meter. High-purity tungsten was used as substrate to make standard curve. Background correction method and optimum wavelength of every element were selected. Vertical plasma observation way was chosen for titanium determination. Horizontal plasma observation way was chosen for cobalt, nickel, tantalum, niobium, vanadium,chromium determination. Contents of cobalt, nickel, titanium, tantalum, niobium, vanadium, chromium in hard metal were fast determined by standard curve law. When the mass percentage is 0.100%-1%, reclaimable rate is within 98.8%-113.2%.Compared with the national standards X- fluorescence spectrographic methods, when the mass percentage is 5% -22 %,absolute deviation is smaller than 0.3%. When the mass percentage is 0.100%-1 %, absolute deviation is smaller than 0.1%,which is smaller than the national standards method allowable deviation. This method is fast and easy to operate.It can be applied to production analysis.