用ICP-MS测定乙烯聚合催化剂中镁、铝和钛元素含量  

Quick determination of Mg,Al and Ti contents in ethylene polymerization catalyst using inductively coupled plasma mass spectrometry

作　　者：宋阳[1] 黄文氢[1] 魏新宇[1] 张颖[1] 

机构地区：[1]中国石化北京化工研究院,北京100013

出　　处：《石化技术与应用》2014年第3期251-254,共4页Petrochemical Technology & Application

摘　　要：在美国Agilent公司制造的7500 CX型电感耦合等离子体质谱仪上,以硝酸为消解试剂,采用外标曲线结合内标校正法,建立了用于测定乙烯聚合Ti-Mg-Al催化剂的Mg,Al,Ti元素质量分数的定量分析法.结果表明,该方法可以同时测定催化剂中Mg,Al,Ti的元素质量分数.所测定的各元素计数值的长周期稳定性、试样的稀释重复性及试样分析的重复性均很好,三者相对标准偏差分别低于3.0％,5.0％（综合值）,4.0％.各元素的加标回收率为96％～101％.The method for determining mass fraction of Mg, A1 and Ti in Ti - Mg - Al ethylene polymerization catalysts was established using Agilent 7500 CX inductively coupled plasma mass spectrometer with nitric acid as digestion reagent by external standard calibration combined with internal stand- ard calibration. The results showed that the mass fraction of Mg, Al and Ti in the catalyst could be determined in an single scan. The long period stability of each element measurement, the repeatability for sample dilution and the obtained massfraction resuhs of Mg, Al and Ti were good. The relative standard deviations （RSD） of them were less than 3.0% , 5.0% （ total RSD） and 4.0% respectively. The recoveries of addition standard of Mg, Al and Ti were in the range of 96% - 101%.

关 键 词：乙烯聚合催化剂 含镁质量分数 含铝质量分数 含钛质量分数 分析测试 

分 类 号：TQ314.242[化学工程—高聚物工业]