摘要
本文提出苯乙烯-顺丁烯二酸共聚物的磺酸盐(SSMA)中磺酸基的测定方法。将SSMA与KOH在340℃共熔进行磺基碱解,所分解的SO_3^(2-)氧化为SO_4^(2-)后用过量Ba^(2+)予以沉淀,剩余Ba^(2+)用K_2CrO_4,进行交流示波极谱滴定,以间接求得磺酸基含量。
A mothod for the determination of sulfe-group is diseribed in sulfonated copolymer of styrene and maleic anhydride(SSMA). Samples of SSMA with KOH were fused at 340℃, SO_3^(2-) was oxidized to SO_4^(2-). SO_4^(2-) ions were precipitated as BaSO_4 by the addition of an excess of standard barium salt solution. The excess Ba^(2+) ions were then analyzed by al ternating current oscillopolarographic titration using a mercury drop electrode. The degree of sulfonaion of SSMA was thus indirectly determined. The methotd was rapid and accurate.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1991年第1期108-110,共3页
Chinese Journal of Analytical Chemistry
关键词
SSMA
磺酸基
滴定
交流示波极谱
Alternate current oscillofolarcgraphic titration, Sulfo-group, Sulfonated copolymer of styrenc and maleic anhydride
