羧基化碳纳米管在荧光酮光度法测定铅中的应用  

Application of Carboxylic Carbon Nanotubes to the Spectrophotometric Determination of Lead with DBH-PF

作　　者：毛蕾蕾[1] 王宗花[1] 邢琳琳[1] 闫永臣[1] 陈悦[1] 

机构地区：[1]青岛大学化工学院化学系,青岛266071

出　　处：《高等学校化学学报》2006年第5期830-833,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:20475029);山东省优秀中青年科学家科研奖励基金(批准号:2004BS04008)资助

摘　　要：研究了羧基化碳纳米管（c-MWNT）存在下二溴羟基苯基荧光酮（DBH—PF）与铅离子的显色反应．结果表明，在pH=9.4～10.0的硼酸盐缓冲介质中，二溴羟基苯基荧光酮和铅离子在羧基化碳纳米管的存在下能形成稳定的浅红色配合物，最大吸收波长为558nm，表观摩尔吸光系数为5．62×10^4L·mol^-1·cm^-1，当含量在（1—50μg）／25mL范围内时，满足朗伯-比尔定律．Carboxylic carbon nanotubes were used in the chromogenic reaction for the determination of lead with 2,3,7-trihydroxy-9-（3,5-dibromo-4-hydroxyphenyl） flunrone （DBH-PF）. A red complex was formed in the borate buffer solution in a pH range of 9.4--10. 0. The maximum absorption of the complex appeared at 558.0 nm, and the apparent molar absorptivity was 5.62×10^4L·mol^-1·cm^-1. The lineafity of the Pb^2＋ in mass concentration ranges from 1 μg to 50μg per 25 mL of solution with a correlation coefficient of 0. 999 6. This method has been applied to the determination of trace lead in cosmetics successfully.

关 键 词：碳纳米管 荧光酮 光度法 铅 

分 类 号：O657[理学—分析化学]