摘要
研究了以１－（５－溴－２－吡啶偶氮）－２－萘酚－６－磺酸（５－Ｂｒ－ＰＡＮ－Ｓ）作为络合滴定指示剂测定锌。在ｐＨ６．０的ＨＡｃ－ＮａＡｃ介质中，加入５滴０．１％的５－Ｂｒ－ＰＡＮ－Ｓ溶液作为指示剂，以ＥＤＴＡ标准溶液对锌进行滴定，溶液颜色由紫红色变为黄色，终点突跃敏锐，准确度高。方法用于锌盐和合金中锌的测＊定，结果满意。
In this paper, an accurate method with 5-Br-PAN-S as the indicator for complexometric titration of zincin the medium of acetic acid -sodium acetate of pH6.0 is described.The end point is sharp.The method has been usedin the determination of zinc in zinc salts and alloys with satisfactory results.
出处
《冶金分析》
CAS
CSCD
北大核心
1998年第3期33-34,32,共3页
Metallurgical Analysis
关键词
锌
络合滴定
指示剂
PAN
Zinc,1-(5-Bromo-2-pyridylazo)-2-naphthol-6-sulphonic acid,Complexometric titration
