2-(2-喹啉偶氮)-1,5-苯二酚固相萃取光度法测定饮用水中铜的研究  

Study on Solid Phase Extraction Spectrophotometric Determination of Copper(Ⅱ) with 2-(2-Quinolinylazo)-1,5-Dihydroxidebenzene

作　　者：胡秋芬[1] 黎勇坤[2] 汤丹瑜[2] 杨光宇[2] 尹家元[2] 

机构地区：[1]玉溪师范学院化学系,玉溪653100 [2]云南大学化学系,昆明650091

出　　处：《分析科学学报》2002年第5期412-414,共3页Journal of Analytical Science

摘　　要：根据新试剂 2 -( 2 -喹啉偶氮 ) -1 ,5-苯二酚 ( QADHB)与铜的显色反应及Waters Porapak○R Sep-Park固相萃取小柱对显色络合物的固相萃取 ,建立了一种测定水样中铜的新方法。在 p H=4.0 HAc-Na Ac缓冲介质中 ,溴化十六烷基三甲基铵( CTMAB)存在下 ,QADHB与铜反应生成 2∶ 1稳定络合物 ,该络合物可用 WatersPorapak○R Sep-Park固相萃取小柱富集 ,用乙醇洗脱后用光度法测定 ,可测定水样中μg/ L级的铜。方法用于几种饮用水中铜的分析 。Based on the color reaction of 2-(2-quinolinylazo)-1,5-dihydroxidebenzene (QADHB) with copper (Ⅱ) and the solid phase extraction of its colored complex with Waters Porapak ○R Sep-Park-C 18 cartridge, a new method for the determination of trace copper (Ⅱ) is studied. In the medium of CTMAB and presence of pH=4.0 buffer solution, QADHB can reacts with copper (Ⅱ) to form a stable 2∶1 complex. The colored complex can be extracted by C 18 cartridge, eluted by ethanol, and then determined by spectrophotometry at 560 nm. Beer's law is obeyed in range of 0~1.0 μg/mL. This method can be applied to the determination microamount of copper in water with satisfactory results.

关 键 词：测定 饮用水 2-(2-喹啉偶氮)-1 5-苯二酚 固相萃取 光度法 铜 

分 类 号：TU991.21[建筑科学—市政工程] R123.1[医药卫生—环境卫生学]