微乳液介质-4-(6-甲氧基-8-喹啉偶氮)-间苯三酚分光光度法测定微量铜

Determination of Trace Cu by Spectrophotometry with Microemulsion/4-(6-Methoxyl-8-Quinolineazo)-Phloroglucinol

研究了溴代十六烷基吡啶、正丁醇、正庚烷和水自制微乳溶液介质中,4-(6-甲氧基-8-喹啉偶氮)-间苯三酚与铜的显色反应,建立了分光光度法测定微量铜的新方法。在显色液中铜的质量浓度在0.010 mg/L^0.700 mg/L范围内符合比尔定律,方法检出限为0.003 mg/L,铝合金和水样测定的RSD为0.3%~1.7%,加标回收率为96.3%~104%。

The new method of trace determination was established by spectrophotometry with color reaction of Copper and 4-（6-methoxyl-8-quinolineazo）-phloroglucinol in microemulsion self made from Hexadecylpyridine bromide,butanol,heptane and water.Beer′s law was obeyed in the range from 0.010 mg/L to 0.700 mg/L in colorful solution.The detection limit was 0.003 mg/L.The RSDs of aluminium alloy and water samples were from 0.3% to 1.7%.The spiked recoveries were from 96.3% to 104%.