摘要
为了测定硫化沥青中游离硫的含量,利用沥青中的游离硫与亚硫酸钠反应生成硫代硫酸钠的反应,用碘液滴定生成的硫代硫酸钠,间接得到游离硫含量。试验确定最佳反应条件,并采用了电位滴定法指示滴定终点,使得测定的准确度明显提高,相对误差小于1%。
In order to determine the free sulfur in asphalt, the free sulfur react with sodium sulfiteto generate sodium hyposulfite, the iodine was used to titrate the sodium hyposulfite to get the quanti-ty of free sulfur. The best reaction condition was confirmed, the electrolytic titrations was used to indicate the end point of titration. Using electrolytic titrations can improve the accuracy obviously and make the error smaller than 1%
出处
《石油沥青》
2007年第5期55-57,共3页
Petroleum Asphalt
关键词
沥青
游离硫
电位滴定
Asphalt
Free sulfur
Electrolytic titrations
