Product category:
Liquid Analysis: Titration, HPLC, IC
News Release from: Metrohm UK | Subject: Combi Degasser
Edited by the Processingtalk Editorial
Team on 14 March 2003
Degassing liquid chromatography eluents
The Metrohm 837 Combi-Degasser is introduced, for degassing eluents before use in advanced ion chromatography, for example in quality control laboratories in manufacturing industries
Gas bubbles in eluents produce an unstable baseline as high-pressure pumps for ion chromatography can transport liquids but not gases This is why it is advisable to degas eluents before use
This article was originally published on Processingtalk on 2 Jul 2008 at 8.00am (UK)
Related stories
Tighter process control in acid pickling baths
Online ion chromatography from Metrohm has enabled tighter process control of acid pickling baths, as the final cleaning stage prior to metal plating
A very similar problem is encountered when samples which already contain gas bubbles or which could release gas are to be measured.
In such cases it is also necessary to remove the gas phase first.
Both the degassing of the eluents and the degassing of the samples can be carried out manually, eg with a water-jet vacuum pump, or fully automatically with the 837 IC Eluent Degasser (Version 0030).
The degasser module is simply included between the eluent and IC pump or between the sample and the injection valve.
The eluent and sample then flow through the special Teflon-AF capillaries, which are located in separate vacuum chambers.
The vacuum removes even microscopically small gas bubbles, excess carbon dioxide or nitrogen.
Time-consuming manual eluent and solvent degassing are no longer necessary.
The 837 IC Eluent Degasser (Version 0030) is equipped with a total of three vacuum chambers so that two eluent flows and one sample flow can be degassed simultaneously.
The electronically controlled vacuum pump means that the 837 IC Eluent Degasser runs extremely quietly. Request a free brochure from Metrohm UK ...
• Metrohm UK: contact details and other news
• Email this article to a colleague
• Register for the free Processingtalk email newsletter
• Processingtalk Home Page
Search the Pro-Talk network of sites
