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痕量Cr(Ⅱ)对H_2O_2在碱性介质中氧化鲁米诺的反应具有催化作用,反应过程中会发出波长为425 nm的光线,发光强度与Cr(Ⅱ)的含量成比例关系,据此可测定Cr(Ⅲ)。该反应过程可表示为
The trace amount of Cr (Ⅱ) catalyzes the reaction of H 2 O 2 in the oxidation of luminol in alkaline medium, which emits light with a wavelength of 425 nm. The luminescence intensity is proportional to the content of Cr (Ⅱ) Cr (III) can be measured. The reaction process can be expressed as