8-羟基喹哪啶固相萃取光度法测定水样中的铁  

Solid Phase Extraction and Spectrophotometric Determination of Iron in Water with 8-Hydroxyquinadine

作　　者：陈江虹[1] 胡秋芬[1] 杨光宇[1] 尹家元[1] 

机构地区：[1]云南大学化学系,昆明650091

出　　处：《分析化学》2003年第7期853-855,共3页Chinese Journal of Analytical Chemistry

基　　金：云南省教育厅基金资助项目 (No .0 11114 3 )

摘　　要：研究了 8 羟基喹哪啶与铁的显色反应 ,在pH为 8.0的氯化氨 氨水缓冲介质中 ,在十六烷基三甲基溴化铵 (CTMAB)存在下 ,8 羟基喹哪啶与铁反应生成 3∶1稳定的蓝紫色络合物 ,该络合物可被WatersSep Park C1 8固相萃取小柱萃取 ,用乙醇洗脱后用光度法测定 ,络合物λmax=6 0 0nm。在此波长下其它金属离子的络合物无光吸收 ,对铁选择性很好 ,铁含量在 0～ 5mg L内符合比尔定律 ,方法用于水样中痕量铁的测定 ,结果令人满意。The color reaction of iron(III) with 8-hydroxyquinadine was studied. In pH 8.0 NH4 Cl-NH3 . H2O buffer solution and cetyltrimethylammonium bromide (CTMAB) medium, 8-hydroxyquinadine reacts with iron(III) to form a stable 3: 1 complex. This complex can be extracted by Waters Sep-Park C-18 cartridge and eluted by ethanol. The molar absorptivity of the complex is 7.17 x 10(3) L . mol(-1) . cm(-1) at 600 nm. Beer's law was obeyed in range of 0 similar to 5.0 mg/L for Fe(III). This method has been applied to the determination of iron in water with satisfactory results.

关 键 词：8-羟基喹哪啶 固相萃取 光度法 测定 水样 铁 化学分析 

分 类 号：O657.3[理学—分析化学]