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研究了在硫酸介质中苯酚对Ｉ－催化Ｃｅ４＋－Ａｓ（Ⅲ）反应的抑制作用及其动力学条件．建立了用催化动力学光度法测定痕量苯酚的新方法．结果表明，在０．００１ｍｏｌ／ＬＣｅ（ＳＯ４）２，０．００１２５ｍｏｌ／ＬＡｓ２Ｏ３，０．０１ｍｇ／ＬＫＩ，０．０１２５ｍｏｌ／ＬＨ２ＳＯ４和０．１３％（ｗ／ｖ）ＮａＣｌ溶液中测定苯酚，其表观摩尔吸光系数为２．１×１０５Ｌ·ｍｏｌ－１·ｃｍ－１，线性范围为０．０６５～０．２６ｍｇ／Ｌ．用本法测定废水中酚，结果满意．
The inhibitory effect of phenol on I-catalyzed Ce4 + -As (Ⅲ) reaction and its kinetic conditions were studied in sulfuric acid medium. A new method for the determination of trace phenol by catalytic kinetic spectrophotometry was established. The results showed that the phenol was measured in 0.001 mol / L (SO4) 2, 0.00125 mol / L As2O3, 0.01 mg / LKI, 0.0125 mol / LH2SO4 and 0.13% (w / v) The extinction coefficient was 2.1 × 105 L · mol-1 · cm-1 and the linear range was 0.065 ~ 0.26 mg / L. The determination of phenol in wastewater by this method was satisfactory.