首页 | 本学科首页   官方微博 | 高级检索  
     


New evaporative light scattering detector for high temperature gel permeation chromatography
Authors:Adrian Boborodea  Stephen O’Donohue
Affiliation:1. Certech ASBL, Rue Jules Bordet, Zone industrielle C, Seneffe, Belgiumadrian.boborodea@certech.be;3. Agilent Technologies LDA UK Ltd, Stokeswood Road, Craven Arms, Shropshire, UK
Abstract:A new evaporative light scattering detector (ELSD) for the analysis of polyolefins by high temperature gel permeation chromatography (GPC) was recently introduced by Agilent Technologies. For the first time, we investigated the possibility to use this detector to measure the molecular weight distributions (MWD) of different type of polyolefines (polypropylene, linear, and low-density polyethylene). These samples were previously characterized by GPC with a differential refractive index (DRI) detector by several companies, in an interlaboratory study conducted by International Union of Pure and Applied Chemistry.[1 Luruli, N. 2010. PHASE 1: IUPAC SEC/GPC Round Robin Project Report: Repeatability and Reproducibility of Sample Preparation and Analysis in High-Temperature SEC, http://media.iupac.org/projects/2005/2005-011-3-400_rpt-phase1_110510.pdf [Google Scholar]] The excellent baseline stability of ELSD as compared with DRI was reflected in a better reproducibility of the measured average molecular weights. More importantly, after applying required corrections to linearize the response of the ELSD as a function of concentration, we obtained similar results as previously obtained with DRI for the MWD of analyzed resins, covering typical applications of polyolefins.
Keywords:Evaporative light scattering  high- temperature GPC  LDPE  LLDPE  PP
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号