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中文摘要：
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0．1mol·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^-4mol·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．O×10^-4mol·L^-1，二者的检测限分别为3．6×10^-7和2．4×10^-7mol·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％．
英文摘要：
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%.
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