丙烯聚合催化剂载体中碳对镁含量分析的影响  

Effect of carbon on magnesium content determination in propylene polymerization catalyst supports

作　　者：陈建华[1] 宋阳[1] 张颖[1] 岑为[1] 魏新宇[1] 黄文氢[1] 

机构地区：[1]中国石油化工股份有限公司北京化工研究院,北京100013

出　　处：《分析试验室》2014年第7期851-854,共4页Chinese Journal of Analysis Laboratory

摘　　要：采用ICP-MS以无水氯化镁、碳镁摩尔为5～8：1的氯化镁醇合物丙烯聚合催化剂载体和碳镁摩尔比为12：1的六乙醇合氯化镁为对象,分别在普通模式、He模式下采用外标曲线加内标校正法和He模式下标准加入法测定其中的镁含量,并取几个典型样品采用ICP-OES进行镁含量测定。考察了采用ICP-MS测定丙烯聚合催化剂载体中镁含量时碳可能产生的影响。实验结果表明,对于碳镁摩尔比从5～8∶1到12∶1样品,碳对镁含量分析的影响均很小,其镁含量均可以在普通模式下采用外标曲线加内标校正法进行快速、简单、准确的测定。In this article,the potential effect of carbon on magnesium content determination by ICP-MS was investigated.Magnesium contents of MgCl2,supports（C/Mg molar ratio 5 ～8：1） for propylene polymerization catalysts and MgCl2·6C2H5OH were determined by ICP-MS under normal mode,He mode and standard addition method under He mode.The data obtained by ICP-MS was compared with that obtained by ICP-OES.The results indicated that carbon had little effect on magnesium content analysis when the mole ratio of carbon to magnesium ranged from 5 ～ 8：1 to 12：1 and accurate magnesium contents in supports could be obtained simply by ICP-MS under normal mode by external standard calibration combined with internal standard calibration.

关 键 词：镁含量 ICP-MS 分子离子干扰 

分 类 号：O657.63[理学—分析化学]