新显色剂QDMOP的合成及其光度法测定水中微量铜

Synthesis of 2-(2'-Quinolinlazo)-4,5-Dimethyoxyphenol and Spectrophotometric Determination of Copper in Water

研究了新显色试剂QDMOP（2-（2’-喹啉偶氮）-4，5-二甲氧基苯酚）的合成及与铜的显色反应，在pH=5．5的HAc—NaAc缓冲介质中，在CTMAB存在下，QDMOP与铜反应生成2：1稳定的红色配合物，λmax=552nm，摩尔吸光系数8为7．328×10^4L．mol^-1．cm^-1，铜含量在0—10μg／25mL内符合比尔定律。

2 - （2＇- Quinolinlazo） -4,5 - dimethyoxyphenol （QDMOP） was synthesized and its reaction with Cu2 ＋ was studied, In the medium of CTMAB （ HAc - NaAc buffer solution, pH 5.5 ） a stable 2 ： 1 red complex of QDMOP with Cu^2 ＋ was formed, which was accord with Beer＇s law in the range of 0 - 10.0 g/25 ml. The molar absorption was 7. 328＇ 10 ^- 4 L · mol^ - 1 · cm ^- 1 at 552 nm. The method was applied to the determination of copper in water with satisfactory results.