摘要
提出了采用示波极谱法测定馏分油及石油产品中元素硫的方法。支持电解液是含有０．５ｍ ｏｌ／Ｌ醋酸和０．３ ｍ ｏｌ／Ｌ醋酸铵体积比为１∶１的甲苯－甲醇溶液。在此介质中，饱和甘汞电极的峰电位为－ ０．６１Ｖ。该方法灵敏度高，当元素硫浓度为０．１ ｍ ｇ／Ｌ时仍可以看到明显峰电流；精密度和准确度较好，对１ ｍ ｇ／Ｌ元素硫的测定，标准偏差为０．０２；元素硫浓度在０～４ ｍ ｇ／Ｌ浓度范围与极谱峰电流呈线性关系。
A polarographic procedure is described for the determination of elemental sulfur in petroleum fractions and products. The supporting electrolyte is 0.5 mol/L ammonium acetate/0.3 mol/L acetic acid in a 1∶1 toluene/methanol solution. In this medium, the peak potential is -0.61v. This method has high sensitivity; when the sulfur content is above 0.1 mg/L, good precision and accuracy can be obtained. The standard deviation is 0.02 for determination of 1 mg/L elemental sulfur. When the sulfur concentration is in the range of 0~4 mg/L, the elemental sulfur has a linear relation with the peak current of polarography.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2000年第1期58-60,共3页
Petroleum Processing and Petrochemicals
基金
中石化集团公司资助!项目
项目号397022
关键词
石油馏分
极谱法
硫
元素测定
petroleum fraction
polarography
elemental sulfur
