Comparison of inductively coupled plasma atomic emission spectrometry, X-ray fluorescence spectrometry and spectrographic methodfor the determination of copper, lead, zinc and nickel in geochemical samples
Abstract：A comparison between inductively coupled plasma atomic amission spectrometry(ICP-AES), X-ray fluorescent spectrometry(XRF) and spectrographic method for the determination of copper, lead, zinc and nickel in geochemical samples was made from the preparation of analytical sample, the detection limit, precision and accuracy of analytical method aspects. In ICP-AES , the sample was dissolved in aqua regia and the elements were determined using analytical lines with low interference In XRF, the calibration curve was plotted using the national certified reference materials of rock, soil, stream sediment and synthesized limestone for spectral analysis. The Compton scattering line of Kα line from rhodium target was used as internal standard to correct the matrix effect. In spectrographic method, the sample weighing was not required. The potassium iodate saturated solution was used as buffer reagent. The quantitative spectra interpretation was automatically realized by CTS computer. The comparison indicated that the ICP-AES exhibited wide measurement range, low detection limit, high precision and good accuracy, and it was suitable for the determination of copper, lead, zinc and nickel in large amounts of geochemical samples. The detection limit, precision and accuracy of XRF could basically meet the requirements of regional geochemical investigation specifications. Its analytical efficiency was depended on the forming rate of pressed geochemical samples. The detection limit, precision and accuracy of spectrographic method could basically meet the requirements. However,the analytical procedures were long and the operation was complicated. Its analytical efficiency was low for the determination of geochemical samples in large amount.
苏梦晓,陆安军. 电感耦合等离子体原子发射光谱法、X射线荧光光谱法和摄谱法测定地球化学样品中铜、铅、锌、镍的比较[J]. 冶金分析, 2015, 35(5): 48-53.
SU Meng-xiao, LU An-jun. Comparison of inductively coupled plasma atomic emission spectrometry, X-ray fluorescence spectrometry and spectrographic methodfor the determination of copper, lead, zinc and nickel in geochemical samples. , 2015, 35(5): 48-53.
