摘要
利用置换滴定法原理,在pH=10的氨性缓冲溶液中,加入适量MgY,以络黑T为指示剂,用EDTA滴定Ba2+,测定试样中氯化钡的含量。在中性溶液中,加入少量淀粉,以二氯荧光素为指示剂,用硝酸银标准溶液滴定溶液中的Cl-,并在计算氯化钠含量时扣除氯化钡中Cl-的影响,从而求得试样中氯化钠的含量。该方法用于中温盐浴氯化钡、氯化钠混合盐中氯化钡、氯化钠的测定,结果满意。
A new method for the rapid determination of barium chloride and sodium chloride is described respectively in this paper. The replacement titrate principle is used for determination of barium chloride by joining right amount MgY in a ammoniac buffer solution of PH10 when titrate Ba (Ⅱ) with EDTA. Winds black T is used as indicator. For determination of sodium chloride,joins few starch in neutral solution that is used to titrate CI- with silver nitrate standard solution. Take two chlorine fluorescein as indicating reagent. Then calculate the content of sodium chloride by deducting the affect of barium chloride. The proposed method has been applied to the determination of warm salty bath blending salt with satisfactory results.
出处
《新技术新工艺》
2008年第6期54-55,共2页
New Technology & New Process
关键词
中温盐
氯化钡
氯化钠
MgY
淀粉
warm salt
barium chloride
sodium chloride
MgY
starch