新试剂1—(4—安替比林偶氮)—4—氨基—2—萘甲酸与铜显色反应研究

Study on Color Reaction of 1- (4 - Antipyrinylazo ) - 4 - Amino -2- Naphthalic Acid with Copper (Ⅱ)

在pH60HAc－NH4Ac缓冲介质中，CTMAB存在下，1－（4-安替比林偶氮）－4氨基一2一萘甲酸（AANA）与铜生成2：1红色络合物，λmax＝540nm，ε=4.06×104L·Lmol-1·cm-1，铜含量在0－30μg/25内符合比尔定律，方法用于食品中铜的测定，结果满意。

In the presence of pH 6.0 HAc - NH4Ac buffer solution and CTMAB medium, coPper (Ⅱ)can react with 1 - (4 - antipyrinylazo )- 4 - amino - 2 - naphalic acid (AANA) to form a 1:2 red com-lex. The moar absorptivity is 4.06×104 at 540 nm. This method can be applied to the detendnation ofcopper in food with satisfactory result.