摘要
介绍了在洗衣粉中含有三聚磷酸钠、4A沸石、硅酸盐和碳酸盐等无机盐与SO42-共存的情况下,经过特殊化学处理后,基于Ba2+与偶氮氯膦Ⅲ形成络合物的稳定常数和其他钡盐的差异,在pH=1 7,以偶氮氯膦Ⅲ为指示剂,用氯化钡标准溶液直接滴定硫酸根。此分析方法简便、快速、相对误差小于0 5%,结果之差最大值小于1%。
A simple and fast determination method of sulfate which was co-existed with polyphosphate?zeolite?silicate and carbonate in laundry powder was described.Due to different stability constants between barium chlorophosphonazo Ⅲ and other compound of bariate,sulfate was titrated by barium chloride standard solution using chlorophosphonazo Ⅲ as indicator when pH value was 17.Result by this method has good accuracy(the error is less than 05 %).The precision meet the criterion of GB/T 15817-1995.
出处
《日用化学工业》
CAS
CSCD
北大核心
2003年第2期110-111,共2页
China Surfactant Detergent & Cosmetics
关键词
洗衣粉
硫酸钠
稳定常数
络合物
滴定
laundry powder
sodium sulfate
stability constant
complex
titrate
