Selectivity studies using a new anion separation column for IC
In chromatographic work the selectivity of the column with respect
to the substances to be determined is of great importance,
especially if very similar components have to be separated.
In contrast to HPLC, in ion hromatography the elution sequence
of the ions is given by their charges and ion radii
for practically all separation materials. There are
only few separation columns whose selectivities for a few anions
can be modified by external parameters such as temperature,
pH value of the eluent or eluent composition in general.
The anion separation column METROSEP A Supp 10 is very flexible
regarding selectivity modifications. Thus, for example, bromide
and nitrate can be shifted widely within the chromatogram
by just changing the column temperature. The position of
the phosphate peak can also be adapted to
the requirements of the separation problem by varying
the eluent composition.
Another advantage of this separation column
is the very large
selectivity difference of sulfite and sulfate as well as
the position and small size of the system peak (carbonate), which elutes much earlier than chloride.
Metrosep A Supp 10 Variants
| 50 x 4.0 mm ID |
ideal for straightforward separation problems and non-problematic
matrices |
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| 75 x 4.0 mm ID |
for high sample throughput and for samples with high ionic strength,
e.g. for the analysis of cola
drinks or for air analysis |
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| 100 x 4.0 mm ID |
excellent separation performance combined with moderate elution
times; universally applicable anion separation column |
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| 250 x 4.0 mm ID |
for samples with high ionic strength, for complex separation tasks
and for analyses with very large concentration differences between
the individual components |
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The A Supp 10 IC separation column is extremely flexible. By modifying
the eluent composition and/or the temperature, this IC column
can be adapted to a large number of applications,
thus replacing part of the special columns that have been required up
to now.
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