采用循环伏安法研究了邻苯二酚(CAT)、间苯二酚(RE)和对苯二酚(HQ)在0.5 mol/L硫酸水溶液中的电化学行为,循环伏安法和差分脉冲伏安法研究了CAT、RE和HQ共存体系的伏安行为.实验结果表明,在pH =0的硫酸水溶液中,扫描速率为10 mV/s,循环伏安法扫描电位在0～1.2V(vs.Ag/Cl)时,分离效果明显.本文采用差分脉冲伏安法,测定了CAT、RE和HQ的混合物,检出限依次为3.9×10-6、3.9 ×10-6和7.8×10-6 mol/L.将该方法用于合成样品测定,其精密度和准确度均满足分析要求.
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