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本文介绍一种快速直接测定铬(Cr~(3+))的分光光度法——EDTA法。该法可不分离铁,即在PH=0.6～1.0范围内,将铁离子(Fe~(3+))用抗坏血酸还原。本法以测定钢样中铬(Cr~(3+))为例,并与标准钢样比较。
This paper presents a rapid and direct determination of chromium (Cr ~ (3 +)) spectrophotometry - EDTA method. The method can not separate iron, that is, in the range of pH = 0.6 ~ 1.0, the iron ions (Fe ~ (3+)) with ascorbic acid reduction. This method is based on the determination of chromium (Cr 3+) in steel samples and compared with the standard steel samples.