微库仑仪分析测硫时负峰的消除  

ELIMINATION OF NEGATIVE PEAKS IN DETERMINING THE AMOUNT OF SULFUR WITH MICRO-COULOMB ANALYZER

作　　者：石玮[1] 

机构地区：[1]北京燕山石油化工公司化工二厂检验中心

出　　处：《石化技术》1996年第2期116-119,共4页Petrochemical Industry Technology

摘　　要：在采用氧化微库仑法测定硫含量的过程中，为了克服样品易结焦炭化的缺陷，本文作者采用了新型的双路氧燃烧管以提高燃气比，使样品燃烧完全。虽克服了结炭现象，但也使Ｎ、Ｃｌ、Ｂｒ等元素燃烧后的氧化干扰物的影响增加，氧化干扰物与还原性的滴定物（Ｉ２）反应出现负峰。本文就丙烯气中微量硫含量测定时出现的负峰的消除进行了研究，并考察了方法的精确度。In order to make the samples burn completely and avoid carbonizing during thecourse of determining the sulfur content bythe oxidization microcoulomb analysismethod, a new combustion tube with twooxygen paths has been utilitied to increasethe ratio of oxygen. The carbonizing has beenrestrained,but interference caused by the oxides of N, Cl, Br, formed in the process ofburning, has been greatly increased. Meanwhile, negative peaks have appearad as theresult of the reaction of these oxides andtitrant (I2). The method of eliminating negative peaks and its accuracy has been studiedin this article.

关 键 词：负峰 硫含量 氧化微库仑法 

分 类 号：O657.12[理学—分析化学]