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一、双向全差示法及其应用差示比色法(或称精密比色法)的来由和发展、原理及应用,文献[1—3]有详细介绍。这里侧重讨论双向全差示法的改进及应用。用一个参比调透过率(以下简称T)100％,测高于参比的试液的方法即为大家熟知的差示法(又称高吸收法)。用一个参比调T为0,而以试剂空白调T为100％,测定低于参比的试液的方法称低吸收法。它与高吸收法一样,都能提高测量精度,但调节却很不方便,要将光强与检流计的
First, the two-way full differential method and its application Differential colorimetry (or precision colorimetric method) of the origin and development, principles and applications, the literature [1-3] are described in detail. Here focuses on the improvement and application of two-way full differential method. With a reference transfer rate (hereinafter referred to as T) 100%, higher than the reference test solution is known as the differential method (also known as high absorption method). T with a reference tone is 0, while the reagent blank tune T is 100%, lower than the reference test solution is called low absorption method. It is the same with the high absorption method, can improve the measurement accuracy, but the adjustment is very inconvenient, to the light and galvanometer