交流示波极谱滴定废水中的酚

Determination of Phenol in Wastewater by Alternating-current Oscilloscopic Polarography Titration

鉴于Ｂｒ２在交流示波极谱曲线（ｄＥ／ｄｔ－Ｅ）上有切口，提出以盐酸和溴化钾的混合溶液作底液，用溴酸钾标准溶液直接滴定水样中酚，以Ｂｒ２的切口出现指示终点．由于本法不受色度、浊度等干扰，故省去了预蒸馏等步骤，方法简便、快速．测定范围为１１．０７—２１１３．２ｍｇ·Ｌ－１（以苯酚计），变异系数小于０．９％，回收率为９５％－１０２％．

A method to use a mixed solution of hydrochloric acid and potassium bromide as base solution to titrate phenol in water sample directly was indicated.The method is simple and rapid.The measuring range is 11.07 -2113.2 mg/L,variation coefficient is bellow 0.9 %,recovery rate is 95 % ～ 102 %.