碳纳米管与TritonX-100协同增敏Cu^(2+)与DBH-PF显色反应的机理研究  

Study on the Synergic Effect of Carbon Nanotubes and TritonX-100 in the Chromogenic System of Cu^(2+)-Dibromohydroxy Phenylfluorone

作　　者：王宗花[1] 官杰[1] 辛福言[2] 张菲菲[1] 夏延致[1] 

机构地区：[1]国家培育基地-纤维新材料与现代纺织重点实验室青岛大学,山东青岛266071 [2]中国水产科学研究院黄海水产研究所,山东青岛266071

出　　处：《青岛大学学报（工程技术版）》2009年第1期85-90,共6页Journal of Qingdao University(Engineering & Technology Edition)

基　　金：国家自然科学基金(50802045);国家基础研究项目(2006CB708603);山东省泰山学者奖励项目

摘　　要：研究了将碳纳米管(MWNTs)作为一种新型分析增效试剂与非离子表面活性剂曲拉通X-100(TritonX-100)的协同增敏作用机理,并应用于Cu2+与二溴羟基苯基荧光酮(DBH-PF)的络合显色体系中。结果表明,在MWNTs与TritonX-100复配的影响下,在pH=6.0~7.0磷酸盐缓冲溶液中DBH-PF与Cu2+形成红色络合物,其最大吸收红移至570 nm,吸收值提高了222.3%。Cu2+含量在1~10 0.04μg/mL范围内符合比耳定律,回归方程A=0.141C+0.028(C,0.04μg/mL),表观摩尔吸光系数ε=2.38×105L/(mol.cm),R=0.999 4。在最佳实验条件下,对中草药肉桂和黄连中的铜含量进行了测定,得到了满意的结果。Here, the carbon nanotubes （MWNTs） were regarded as a novel kind of enhancing agent. A novel ehromogenic system was developed by the synergic effect of MWNTs and non-ionic surfaetants TritonX - 100, and the mechanism was discussed in this work. A red complex of Dibromohydroxy Phenylfluorone （DBH - PF） with Cu^2＋ was formed in the Phosphate buffer solution in a pH range of 6.0 - 7.0. Comparative experiments showed that, due to the synergic effect of MWNTs and TritonX - 100 the absorption of the red complexes increased by 222.3% and the λmax red shifted to 570 nm. The apparent molar absorptivity was 2.38 × 10s L/（mol · cm）. The linearity of the Cu^2＋ in mass concentration ranges from 1μg to 10 μg per 25 mL of solution with a correlation coefficient of 0. 999 4. This method has been successfully applied to the determination of trace Cu^2＋ in Chinese Herbal Medicine.

关 键 词：碳纳米管 TRITONX-100 协同增敏 CU2+ 苯基荧光酮 

分 类 号：O657.3[理学—分析化学]