With every selectivity pack you
get for the ordered column dimension two columns filled
with RP packings of the same particle diameter, but with guaranteed different
separation selectivities (2 x C18, 2 x C8 or C18/C8).
One of the combined packings was
produced with a threefunctional silane, the other one carries alkylmethyl
groups. The residual silanols, which contribute decisively to the separation
selectivity, are in both cases reproducibly determined by the synthesis. On
request both columns or one column can be delivered endcapped. For all
combinations of columns we give a discount of 10 % according to the
What is the advantage?
For instance you develop a
method and optimize a separation problem, but somewhere in the chromatogram
you cannot achieve the necessary solution. Up to now you had to buy a second
separation column, the properties of which were in most cases not fully
known to you. Now this is past. With our selectivity pack you can test your
separations without loss of time immediately with two phases, which possess
different selectivities on principle. You save time and money !
demonstrate the different selectivities of two RP columns for the example of
organic nitrogen compounds. Eluent: water /acetonitrile (6/4).