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早在1950年,Braude即提出了一个半经验方程式: ε=0.87×10~(20)·a(式中,ε表示克分子吸收系数;a表示显色分子的有效截面积[A]来表达ε最大依赖于显色分子有效截面积的关系。沈含熙在论证这一问题时,进一步明确了这个半经验式实际上包括为两个含义,欲提高光度分析的灵敏度,除了要求增大显色分子的有效截面积外,还要求减小光谱带的半峰宽。近年来人们根据Braude的启示进行了研究,出现了许多ε值大于1×10~5,甚至达到
As early as 1950, Braude proposed a semi-empirical equation: ε = 0.87 × 10 ~ (20) · a (where ε is the molecular absorption coefficient; a is the effective cross-sectional area of the colorimetric molecule [A] ε depends most on the relationship between the effective cross-sectional area of the chromogenic molecule.Shen Hexi further argued that this semi-empirical formula actually includes two meanings in the demonstration of this problem, in order to increase the sensitivity of photometric analysis, in addition to increasing the colorimetric molecule In addition to the effective cross-sectional area, but also to reduce the half-width of the spectral band in recent years, according to Braude enlightenment has been studied, there are many ε values greater than 1 × 10 ~ 5, and even reached