Separation columns for ion chromatography
Metrohm (UK)contact supplier
Metrosep A Supp 4, 5, 7,10
Ion Chromatography (IC) applications are solved by selection of the correct separation column and as column technology evolves it prudent to review periodically the available options
Anion columns for use with chemical suppression.
The Metrosep A Supp 4 is a robust workhorse column with excellent separating properties using polyvinyl alcohol particles with a 9um pore size.
This arrangement guarantees a high stability and great tolerance to very fine particles that could pass through the built-in filter plate.
The A Supp 4 is particularly suitable for all routine tasks in water analysis.
The Metrosep A Supp 5 (250) is the high-performance separating column with an extremely high number of plates for the most demanding separating tasks manufactured from a polyvinyl alcohol substrate resin with a 5um diameter.
Even complex separating problems can be solved easily and reproducibly without any sample preparation.
The application range of this column far exceeds the detection of the standard anions and also exhibits selectivity towards organic anions.
With the Metrosep A Supp 7 the oxyhalide ions plus the standard anions can be determined reliably and precisely down to the lower ppb range.
The outstanding detection sensitivity is obtained by applying the 5um polyalcohol polymer, which yields extremely high plate numbers and accordingly excellent separation and detection characteristics.
The separations require a temperature of 45C and meet the requirements of EPA methods 300.1 and 317.0.
The Metrosep A Supp 10 separation column is based on a high-capacity polystyrene/divinylbenzene copolymer having a particle size of only 4.6um and is the column of choice for routine applications due to its separation performance and price.
The column is characterised by its robustness, high selectivity and excellent separation performance.
By variation of temperature, flow rate and eluent composition, the column characteristics can be adapted to the application at hand.
The Metrosep Dual 4 columns contain an entirely novel carrier material incorporating a functionalised monolith based on silica that allows flow rates of up to 5ml per minute.
Even at high flow rates, the column's counter-pressure remains small.
Compared to conventional column substrate materials, the monolith has a much larger surface area which gives a higher capacity.
The Metrosep Dual 4 column is the separation column of choice for the detection of very small amounts of toxic perchlorate allowing detection of 0.5ppb perchlorate in the presence of a total of 3g/l of chloride, carbonate and sulfate.
Cation columns for use without chemical suppression.
The Metrosep C2 (250) is the cation column with a high capacity for the simultaneous determination of mono and divalent cations.
Samples with extreme concentration differences can be reliably analyzed with this column.
With the C2 both amines and transition metals as well as the alkali metals and alkaline earths can be determined in a single run.
The Metrosep C3 (250) is a robust cation column that uses a unique carrier based on a polyalcohol material for an improved peak separation with mono and divalent cations.
The peak shapes obtained with this cation column are perfectly symmetrical and the Metrosep C3's excellent selectivity also allows for the separation of transition metals.
Environmental and Waste Monitoring using online analysis will be explained in greater depth during forthcoming seminars by Metrohm UK and Metrohm Ireland.
Professional instrument service is no less than an operational insurance card that safeguards instrumentation from failure, Metrohm says.
The ADI 2045TI online analyser improves scrubbing process in carbon capture plants, Metrohm says.
Metrohm is inviting process chemists interested in the environmental or waste industry to attend seminar days at its premises in Cheshire, UK or Carlow, Ireland.
Suppression for anion chromatography download
Metrohm has published a brochure summarising the theoreretical aspects and practical benefits of suppression in ion chromatography.