防晒剂2,2′,4,4′-四羟基二苯甲酮在B-R缓冲体系中的极谱行为  

Polarographic Behavior of Sunscreen 2,2′4,4′-Tetrahydroxybenzophenone in B-R Buffer Solution

作　　者：徐绍炳[1] 夏新泉[1] 张盈艳[1] 

机构地区：[1]湖北师范学院化学与环境工程系,湖北黄石435002

出　　处：《分析科学学报》2008年第1期59-62,共4页Journal of Analytical Science

基　　金：湖北省自然科学基金(No.2003ABA062)

摘　　要：用线性扫描极谱法系统研究了2，2’，4，4’-四羟基二苯甲酮（简称BP-2）在不同缓冲体系中的极谱行为。实验表明，在pH=2．25的B-R缓冲溶液中，BP-2的一阶导数峰电位为-1．12V，其峰电流与浓度在5．0×10^-6～9．0×10^-5mol／L范围内的对数值有良好的线性关系，线性方程为ip’（nA／s）=11457＋2133×1gc（mol／L），相关系数为0．9998。BP-2的微分循环伏安研究表明，该极谱波为不可逆还原波；初步讨论了电极反应机理。The polarographic behavior of Benzophenone-2 was studied by linear sweep polarography. The results show that Benzophenone-2＇s first derivative peak potential is -1.19 V （vs SCE） at pH=2.95 B- R buffer solution and its peak current is proportional to the logarithm in concentration of Benzophenone- 9 over the range of 5.0 × 10^-6 -9.0 × 10%-5 mol/L. The linear regression equation is ip（nA/s）= 11 457＋ 9 133× lgc（mol/L） with correlation coefficient of 0. 9998. The curve of cyclic voltammetry show that the polarographic wave is irreversible deoxidization wave. The mechanism of electrode reaction was also briefly discussed.

关 键 词：防晒剂 2 2’ 4 4’-四羟基二苯甲酮(BP-2) 线性扫描极谱法 极谱波 

分 类 号：O657.14[理学—分析化学]