电位滴定测定石油产品中硫醇硫  

Determination of mercaptan sulphur in petroleum products

作　　者：陈信悦[1] 孙延伟[1] 于孝展[1] 田元红[1] 

机构地区：[1]辽宁出入境检验检疫局技术中心,大连116001

出　　处：《福建分析测试》2006年第4期20-23,共4页Fujian Analysis & Testing

摘　　要：本方法系将无硫化氢试样溶解在乙酸钠的异丙醇溶剂中,用硝酸银醇标准溶液进行电位滴定,采用梅特勒-托利多仪器(上海)有限公司制造的DL-77型滴定仪,通过电极电位突越指示滴定终点。实验表明,反应采用现代复合银电极DM141-SC比传统的双电极系统更为简捷、快速、准确。为进出口石油产品检验硫醇硫提供了更好的科学技术依据。In this method hydrogen sulfide- free sample is dissolved in 2 -propanol solvent and then titratad with standard silver nitrate alcoholic solution. The titration end is indicated by a sudden change in cell potential using a Mettler Toledo DL -77 titrator. The results show that the use of modem complex silver electrode is more simple, rapid and accurate than the traditional double electrode system. This method provids a better technology in the inspection of sulfur mercaptan in import and export petroleum products.

关 键 词：石油产品 硫醇硫 电位滴定 复合银电极 

分 类 号：O655.2[理学—分析化学]