对苯二酚、邻苯二酚的快速同时测定  

A Fast and Simultaneous Determination of o-Dihydroxybenzene and p-Dihydroxybenzene

作　　者：王晓岗 刘往专[1] 吴庆生[1] 丁亚平[2] 

机构地区：[1]同济大学化学系,上海200092 [2]上海大学化学系,上海200444

出　　处：《石家庄学院学报》2006年第6期5-8,共4页Journal of Shijiazhuang University

基　　金：国家自然科学基金资助项目(20471042);国家教委博士点基金资助项目(20040247045)

摘　　要：提出了一快速、简便同时测定对苯二酚和邻苯二酚的方法.在浓度为0.1 mol.L-1的HAc-NaAc(pH=5.6)缓冲液中,用玻碳电极(GC)测定对苯二酚、邻苯二酚的还原峰电流,并采用半微分技术进行峰分离,同时添加表面活性剂提高检测的灵敏度,实现了二者的同时测定.结果表明:在1.2×10-6～1.0×10-4 mol.L-1范围内,对苯二酚的半微分电流与其浓度呈线性关系;邻苯二酚的线性范围为8.2×10-7～1.0×10-4 mol.L-1,二者的检测限分别为3.6×10-7和2.4×10-7 mol.L-1.将此方法用于模拟废水中苯二酚的检测,回收率为97%～104%.This paper has suggested a fast and convenient analytical technique to detect dihydroxybenzene isomers directly and simultaneously. In 0.1 mol·L^-1 HAc-NaAc buffer solution （pH=5.6）, the reduction peaks of p-dihydroxybenzene and o-dihydroxybenzene were partly separated by DPV at the GC electrode. By adding the surfactant of cetyl pyridinium chloride （CPC） to enhance the detection sensitivity and using semi-derivative technique to improve the separation,p-DHB and o-DHB have been detected simultaneously. The linear calibration ranges were 1.2×10^-6 to 1.0×10^-4mol·L^-1 for p-DHB and 8.2×10^-7 to 1.0×10^-4mol·L-1 for o-DHB,and with detection limits of 3.6×10^-7 and 2.4×10^-7mol·L^-1,respectively. This method has been applied to the direct determination of DHB isomers in water sample,and the recovery was from 97% to 104%.

关 键 词：苯二酚 同时测定 活性剂 半微分 

分 类 号：O657.1[理学—分析化学]