Abstract

As a rule, the width of a spectral line in atomic emission spectral analysis with arc sources is much smaller than the hardware function of the spectral device. Thus, the spectral line contour is determined by the hardware function of the device and can be approximated, e.g., by the Voigt function. However, when reference samples with a wide range of element concentrations are analyzed, there is a frequent problem of self-absorption that causes one to change the analytical line, which is not always possible. It is proposed to modify the Voigt function by adding a factor that describes self-absorption, by analogy with the Bouguer–Lambert law. The possibility of using the proposed function is evaluated during the analysis of reference samples of rocks, ores, and sandstones in a Grand-Potok spectral system with a MAES analyzer and BLPP-2000 photodetector arrays. The use of the proposed approximating function has provided an increase in the working range of the calibration curves of Cu 327.3954 nm, Cu 324.7532 nm, Pb 287.3311 nm, Ni 305.0818 nm, and Mo 313.2594 nm by 1–3 orders of magnitude.

中文翻译：

---

通过使用自吸收线扩大元素含量范围

摘要

通常，在使用电弧源的原子发射光谱分析中，光谱线的宽度比光谱设备的硬件功能小得多。因此，谱线轮廓由设备的硬件功能确定，并且可以例如由Voigt函数来近似。但是，当分析具有多种元素浓度的参考样品时，经常会出现自吸收问题，这会导致人们改变分析线，这并非总是可能的。与Bouguer-Lambert定律类似，建议通过添加一个描述自我吸收的因子来修改Voigt函数。在对岩石，矿石的参考样品进行分析时，评估了使用建议功能的可能性，带有MAES分析仪和BLPP-2000光电探测器阵列的Grand-Potok光谱系统中的砂岩和砂岩。拟议的近似函数的使用使Cu 327.3954 nm，Cu 324.7532 nm，Pb 287.3311 nm，Ni 305.0818 nm和Mo 313.2594 nm的校准曲线的工作范围增加了1-3个数量级。