Product category:
Chromatographs: liquid, ion, gel, HPLC
News Release from: Metrohm UK | Subject: 754 IC
Edited by the Laboratorytalk Editorial
Team on 06 February 2003
Sample preparation for demanding
applications
Ion chromatography dialysis unit provides successful quantitative anion detection in difficult samples including suspensions and emulsions
The 754 IC dialysis unit is the sample preparation module for numerous demanding applications The determination of anions in complex matrices is no longer a problem with the 754 IC dialysis unit
This article was originally published on Laboratorytalk on 2 Jul 2008 at 8.00am (UK)
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Quantitative anion detection is successful in milk, fruit juice, soil eluates, suspensions, emulsions, and many more samples.
Dialysis is the diffusion of ions - and not the larger particles (>0.2µm) - from the sample solution into the acceptor solution so that a concentration equilibrium is obtained.
This has the advantage that the sample and measurements are not influenced by the filter cake.
This also means that matrix effects are largely excluded.
The dialysis membrane has a working life of up to one week.
Larger particles which could block it are transported past the membrane.
In contrast, ions have an unimpeded passage through the membrane.
The pore size is approx 0.2µm.
The calibration of the dialysis system requires no extra effort.
Recovery and dialysis rates are easy to determine and, with the patented 'stopped flow' method, are in excess of 98%.
The dialysis system can be completely automated.
It can also be operated as a stand-alone unit. Request a free brochure from Metrohm UK ...
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