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.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
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
关键词
碳纳米管
荧光酮
光度法
铅
Carboxylic carbon nanotubes
DBH-PF
Spectrophotometry
Lead
