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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)
【摘要】 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。
【Abstract】 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.
【关键词】 1-(4—安替比林偶氮)-4氨基—2—萘甲酸;
铜;
光度法;
【Key words】 1 - (4 - antipyrinylazo) - 4 - andno - 2 - naphalic acid; copper; spectrophotometry;
【Key words】 1 - (4 - antipyrinylazo) - 4 - andno - 2 - naphalic acid; copper; spectrophotometry;
- 【文献出处】 广东微量元素科学 ,TRACE ELEMENTS SCIENCE , 编辑部邮箱 ,1999年11期
- 【分类号】R155.5
- 【下载频次】22