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The Metrosep
C3 – 250 (6.1010.430) offered by Metrohm is
a robust cation column that uses a
unique carrier based on a polyalcohol material. The
column shows excellent performance
with standard cations and improved peak separation
with monovalent and bivalent cations.
The relevant column parameter is referred to as the
number of theoretical plates per meter (TP/m). The Metrosep
C3 – 250 reaches 42'000 TP/m for sodium, 51'000
for ammonium and 31'000 for barium, which elutes rather
late. The peak shapes obtained with this cation column
are perfectly symmetrical and – compared to the
silicate carrier material – the separation between
sodium and ammonium is significantly improved. The Metrosep
C3's excellent selectivity also allows for the separation
of transition metals. As the
Metrohm ion chromatographs generally determine cations
without chemical suppression, the Metrosep C3 –
250 permits determination of the transition
metals together with the alkali and alkaline earth metals.
The column is highly suitable for the separation
of
Li+, Na+, K+, Rb+, Cs+, Mg2+, Ca2+, Sr2+, Ba2+, NH4+,
Mn2+, Co2+, Zn2+, Ni2+ in the lower ppb range, with
excellent separation between Na+ and NH4+.
Generally low detection limits and the possibility
to determine widely differing concentrations prove highly
beneficial.
The new Metrosep cation column is made of PEEK, its
length is 250 mm and its internal diameter 4 mm. |
