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研究了1:12磷钼杂多酸(PMo_(12))修饰电极对苯酚及苯二酚类(对苯二酚、间苯二酚和邻苯二酚)的催化氧化作用,以及苯酚和苯二酚类在涂敷十二烷基磺酸钠(SDS)的C_(18)键合固定相上的分离方法,采用修饰电极色谱电化学法对其进行分离检测。对苯二酚、邻苯二酚、间苯二酚及苯酚的线性范围依次为4.0×10~(-11)mol/l-2.0×10~(-8)mol/l、4.0×10~(-11)mol/l-2.0×10~(-8)mol/l、8.0×10~(-11)mol/l-2.0×10~(-8)mol/l、8.0×10~(-11)mol/l-2.0×10~(-8)mol/l;检测限依次为2.10×10~(-11)mol/l、2.0×10~(-11)mol/l、4.0×10~(-11)mol/l和4.0×10~(-11)mol/l。平行测定8次,相对标准偏差依次为1.7％、3.3％、2.9％和4.4％。方法可用于化工厂废水中苯酚及苯二酚类的测定。
The catalytic oxidation of phenol and hydroquinones (hydroquinone, resorcinol and catechol) with 1: 12 phosphomolybdic acid (PMo_ (12)) modified electrode was studied. The separation of diphenols on C_ (18) bonded stationary phase of sodium dodecyl sulfate (SDS) was carried out with modified electrode chromatography and electrochemical detection. The linear range of hydroquinone, catechol, resorcinol and phenol were 4.0 × 10 ~ (-11) mol / l-2.0 × 10 -8 mol / l, 4.0 × 10 ~ -11) mol / l-2.0 × 10 -8 mol / l, 8.0 × 10-11 mol / l-2.0 × 10 -8 mol / l, 8.0 × 10- (-11 The detection limits were 2.10 × 10 ~ (-11) mol / l, 2.0 × 10 ~ (-11) mol / l, 4.0 × 10 ~ (-1) mol / -11) mol / l and 4.0 × 10 ~ (-11) mol / l. The results showed that the relative standard deviations were 1.7%, 3.3%, 2.9% and 4.4% respectively. The method can be used for the determination of phenol and hydroquinones in wastewater from chemical plants.