尿素是反映游泳池水受人体污染的一项重要指标。目前 ,尿素测定的常用方法是二乙酰一肟一安替比林法〔1〕,此法线性范围窄 ,反应时间长 ,易褪色。虽然有改进的报道 〔2〕,但仍使用高浓度硫酸 ,使试剂配制、实验操作还存在许多不便。笔者参阅有关文献〔3、4〕,研究了在硫酸高铁? Urea is an important indicator of pool water pollution by the human body. At present, the commonly used method for the determination of urea is diacetyldimethoxime-antipyrine method [1], the linear range of this method is narrow, the reaction time is long, easy to fade. Although there are improved reports 〔2〕, but still use high concentrations of sulfuric acid, reagent preparation, experimental operation, there are still many inconveniences. The author refers to the literature [3,4], studied in the high-speed iron sulfate?