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《化学分析计量》 2017年第06期
DOI:10.3969/j.issn.1008-6145.2017.06.003
管式炉燃烧-碘量库仑滴定法测定石油焦中总硫含量
王红卫1,张爱平1,熊伟1,王超颖1,丁黎1,李国伟1,李建军2,封亚辉2,范崇光3
1. 南通出入境检验检疫局,江苏南通 226004; 2. 江苏出入境检验检疫局,南京 200001; 3. 南通大学化学化工学院,江苏南通 226000 
Determination of Total Sulfur in Petroleum Coke by Tube Furnace Combustion withIonometric Coulometry
Wang Hongwei1,Zhang Aiping1,Xiong Wei1,Wang Chaoying1,Ding Li1,Li Guowei1,Li Jianjun2,Feng Yahui2,Fan Chongguang3
1. Nantong Entry & Exit Inspection and Quarantine Bureau, Nantong 226004,China; 2. Jiangsu Entry & Exit Inspection and Quarantine Bureau, Nanjing 200001, China;3. College of Chemistry and Chemical Engineering,Nantong University,Nantong 226000, China 
摘要:建立一种管式炉内燃烧石油焦样品前处理,然后用自动碘量库仑滴定法测定石油焦中总硫含量的方法。探讨了影响实验结果的因素,电解液采用10 mL冰乙酸溶解于250 mL蒸馏水中,避光保存,实验环境温度为20℃以上,电解液中搅拌转子的转速为500 r/min。在优化的实验条件下,测定结果的相对标准偏差在2.36%~3.94%(n=6)之间,3种石油焦样品加标回收率在82.0%~101.5%之间。该方法可应用于石油焦中总硫含量的测定。 
Abstract:A method for the determination of total sulfur in petroleum coke was developed by the pretreatment of tube furnace combustion following with automatic ionometric coulometry. The factors relevant to the lab results wereinvestigated, 10 mL acetic acid dissolved in 250 mL distilled water was used the electrolytic solution, storage conditionsof electrolytic solution was kept in dark place, ambient temperature was more than 20℃ and rotor speed was approximate 500 r/min. Under the optimized conditions, the relative standard deviations of determination results were in the range of 2.36%-3.94%(n=6), and the recoveries of 3 kinds of petroleum coke samples were in the range of 82.0%-101.5%. The method can be used for the analysis of total sulfur in petroleum coke. 
关键词:管式炉燃烧;碘量库仑滴定法;石油焦;总硫 
Keywords:tube furnace combustion; ionometric coulometry; petroleum coke; total sulfur 
本文引用格式:
王红卫,张爱平,熊伟,等.管式炉燃烧-碘量库仑滴定法测定石油焦中总硫含量[J].化学分析计量,2017,26(6):15-18.
Wang Hongwei,Zhang Aiping,Xiong Wei,et al.Determination of Total Sulfur in Petroleum Coke by Tube Furnace Combustion withIonometric Coulometry[J].Chemical Analysis meterage,2017,26(6):15-18. 

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