二安替比林间甲氧基苯基甲烷与铬(Ⅵ)显色反应研究

Study on the Color Reaction of Diantipyryl-(m-Methoxy)- Phenylmethane with Chromium (Ⅵ)

合成了二安替比林间甲氧基本基甲烷（ＤＡｍＭＭ），研究了它和铬（Ⅵ）的显色反应．在磷酸介质中，Ｍｎ（Ⅱ）存在下． ＤＡｍＭＭ和铬（Ⅵ）反应生成橙色产物，λｍａｘ＝ ４８０ｎｍ，ε＝１．７７ｘ１０５ Ｌ· ｍｏｌ－１· ｃｍ－１．铬（ Ⅵ）含量在 ０～８μｇ／２５ ｍｌ内符合比尔定律，方法用于食品和水样中铬的测定，结果满意．

Diantipyryl- (m-methoxy) - phenylmethane (DAmMM ) was synthesis. The color reaction of DAmMM with Cr(Ⅵ) was studied-In the presence of Mn(Ⅱ), DAmMM can react with Cr(Ⅵ ) to form an orange product in phosphoric acid medium. The molar absorptivity is 1. 77 x 105 L. mol-1. cm-1 at 480 nm Beer's law is obeyed in the range of 0 -8 μg/25 ml. This method can be applied to the determination of chromium in water and food with satisfactory result.