摘要
研究了在苯甲酸乙酯、盐酸羟胺和氯化铁反应体系中间接测定苯甲酰氯的酯化分光光度法,探讨了反应机理和络合物的结构组成。结果表明,以三乙醇胺为增稳剂,溴代十六烷基吡啶(CPB)为增敏剂,在最佳条件下,苯甲酸乙酯的线性范围为(0.05～1.80)mg.mL-1,相关系数(r)0.9993,检出限0.015mg.mL-1。新方法用于苯甲酰氯工业品的测定,RSD=1.76%(n=6),加标回收率达(95.8～101.7)%。
An indirect esterified spectrophotometric method for the determination of benzoyl chloride is studied in the reactive system of ethyl benzoate, oxammonium hgdrochloride and iron chloride. The mechanism of reaction and the composition of complex are discussed. The results show that the linear range of ethyl benzoate is （0.05 1.80） mg·mL^-1, the correlation coefficient （r） is 0.999 3 with a detection limit of 0.015 mg·mL^-1 under the optimum conditions with triethanolamine as a stabilized reagent and cetylpyridine bromide as sensitized reagent respectively. The new method has been applied to the determination of industrial benzoyl chloride, the RSD is t. 76% （n =6） and the recovery is between 95.8% - 101.7%.
出处
《科学技术与工程》
2007年第8期1569-1572,共4页
Science Technology and Engineering
基金
浙江省教育厅项目(20040293)资助
