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在发射光谱分析工作中,为了提高微量元素分析结果的准确度,原则上是应该扣除背景的。然而,从测得分析线对的黑度值到计算出含量需要一定的时间。笔者在资料中介绍了运用公式l0gI_l/I_b=logI_(l+b)/I_b—D(即D法)扣除背景的光谱计算板,简化了计算手续,提高了分析速度。资料介绍运用函数式log(10 ⊿S/r-1)=M编制的《发射光谱分析背景扣除速查表》,亦使换算简便。我们在使甩《速查表》的过程中感到计算谱线黑度及背景黑度的斜率时也花费时间。为了简化,设计了由二块尺板——直线尺板和刻度尺板组成的斜率尺。后又改进用一块尺板即可测量任何工作曲线的斜率。现将一块尺板的斜率尺制作和使用方法介绍如下取一块厚2毫米,长265毫米,宽185毫米的透明
In the emission spectroscopy work, in order to improve the accuracy of trace element analysis results, in principle, should be deducted from the background. However, it takes some time to measure the blackness of the line pair to calculate the level. The author introduced in the information using the formula l0gI_l / I_b = logI_ (l + b) / I_b-D (ie D method) to subtract the background of the spectrum computing board, simplifying the calculation procedures and improve the analysis speed. The introduction of data using the formula log (10 ⊿ S / r-1) = M prepared “Emission Spectrum Analysis background subtraction table”, but also to make the conversion easy. We also felt it was time consuming to calculate the slope of the line black and the background black in the flick of the “look-up table.” In order to simplify, designed by the two feet - linear scale and scale foot plate composed of slope scale. Later improved with a ruler to measure the slope of any working curve. Now a ruler foot scale production and use of the method described below take a piece of 2 mm thick, 265 mm long, 185 mm wide and transparent