2-羟基-4-正辛氧基二苯甲酮的极谱行为  

Polarographic behavior of 2-hydroxy-4-octoxybenzophenone

作　　者：徐绍炳[1] 刘芬[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：《化学试剂》2007年第10期599-601,共3页Chemical Reagents

基　　金：湖北省自然科学基金资助项目(2003ABA062)

摘　　要：用线性扫描极谱法研究了在不同缓冲体系中2-羟基-4-正辛氧基二苯甲酮（简称BP-12）的极谱行为。实验表明，在2mol/L的H2SO4溶液中，BP-12的二阶导数峰电位为-0.92V，BP-12在两个浓度范围内与峰电流呈线性关系。在3×10^-5-4×10^-5mol/L的范围内，线性方程为ip″（nA/s^2）=-2796.8＋1.123×10^8c（mol/L），相关系数为0.9915；在1×10^-6-9×10^-6mol/L范围内，BP-12的浓度的对数值与电流成线性关系，线性方程为ip″（nA/s^2）=669.60＋94.69lgc（mol/L），相关系数为0.9972。BP-12的常规循环伏安曲线表明，该极谱波为不可逆还原波。初步讨论了电极反应机理。The polarographic wave of benzophenone-12 was studied by linear sweep polarography in different kinds of buffer systems. The analytical results showed that the second derivative peak potential of benzophenone-12 was - 0.92 （vs SCE） in a 2 mol/L vitriol buffer solution. Two linear relationships existed between the concentration of benzophenone-12 and the peak current. For one case, the peak current was proportional to the concentration of benzophenone-12 in the range from 3 × 10^-5 mol/L to 4 × 10^-5 mol/L,with the linear regression equation equating to ip＂（nA/s^2） = - 2 796.8 ＋ 1.123 × 10^8c （tool/L） and the correlation coefficient 0.991 5. For the other case, the peak current was proportional to the logarithm of concentration in benzophenone-12 over the range from 1 × 10^-6 mol/L to 9 × 10^-6 tool/L, with the linear regression equation equating to ip＂（ nA/s^2） = 669.60 ＋ 94.69 lgc （tool/L） and the correlation coefficient 0.997 2. The study on the cyclic vohammetry of benzophenone- 12 showed that the polarographic wave was an irreversible deoxidation wave. The mechanism of electrode reaction was investigated preliminarily.

关 键 词：防晒剂 2-羟基-4-正辛氧基二苯甲酮(BP-12) 线性扫描极谱法 极谱波 

分 类 号：O657.14[理学—分析化学]