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在碱性介质中,对苯二酚的Na_2CO_3溶液对鲁米诺-KMnO_4体系的化学发光有很强的增敏作用,据此建立了流动注射化学发光法测定对苯二酚的新方法。对苯二酚溶液浓度在5×10~(-8)~5×10~(-5)mol/L范围内与化学发光强度增强值呈线性关系,方法检出限(3σ)1.75×10~(-8)mol/L,对3.0μmol/L的对苯二酚溶液进行测定,测得其相对标准偏差为1.2%(n=11)。方法已于测定河水中对苯二酚含量。
In alkaline medium, the hydroquinone Na_2CO_3 solution has a strong sensitizing effect on chemiluminescence of luminol-KMnO_4 system, and a new method for the determination of hydroquinone by flow injection chemiluminescence was established. The concentration of hydroquinone in the range of 5 × 10-8 ~ 5 × 10-5 mol / L showed a linear relationship with the chemiluminescence intensities. The detection limit (3σ) was 1.75 × 10 ~ (-8) mol / L, the relative standard deviation of the 3.0mol / L hydroquinone solution was determined to be 1.2% (n = 11). Method The determination of hydroquinone in river water has been carried out.