变化的理论α影响系数在校正Cr-Fe-Ni不锈钢基体效应中的应用

通过Spectra Plusx射线荧光光谱分析软件计算了7个不锈钢标准样品中的其它元素对Cr的理论α影响系数，发现对Cr有二次激发的增强元素的理论α影响系数随着元素含量的变化变动较大。采用随元素含量的变化而变化的理论α影响系数校正不锈钢中的基体效应，较好地校正了其他元素对Cr的增强效应，并使不锈钢和低合金钢中的Cr含量(0．3％～20．8％)可以通过一条校准曲线进行测量。变化的理论α影响系数可以校正含量变化较大的元素的基体效应，可以适当延伸校准曲线的含量分析范围。采用X射线荧光光谱法测定不锈钢中的Al，Si，P，S，Ti，Cr，Mn，Co，Ni，Cu，AS，Mo，Sn，W，Pb等15个元素的含量，用变化的理论α影响系数校正基体效应，测量结果与湿法化学分析结果相符。

The Application of Variable Theoretical α Influence Coefficent to the Matrix Correction in Cr-Fe-Ni Stainless Steel

X-ray fluorescence analysis software Spectra Plus was used to calculate theoretical alpha influence coefficents of other elements to Cr in seven stainless steel standard samples, theoretical alpha influence coefficients of elements, by which Cr signal was enhanced, varied largely with the change of elements content. Variable theoretical alpha influence coefficients, which varied with elements content, were used to correct the matrix effects in stainless steel, the secondary excitation of Cr by other elements were corrected, and Cr (0.3%-20.8%) in stainless steel and low alloy steel could be analysed in accordance with one calibration curve. The matrix effects in samples can be corrected by variable theoretical alpha influence coefficients, so the measurable content range of calibration curve was enlarged. The contents of fifteen elements Al, Si, P, S, Ti, Cr, Mn, Co, Ni, Cu, As, Mo, Sn, W and Pb in stainless steel were measured by X-ray fluorescence spectrometer, variable theoretical alpha influence coefficients were used to correct the matrix effects, and the analysis results are comparable to those obtained by wet chemical method.