产品名称
TSKgel® VMpak-25 HPLC Column, phase ammonium ion, quaternary, L × I.D. 5 cm × 2 mm, 7 μm particle size
material
stainless steel
product line
TSKgel®
manufacturer/tradename
Tosoh 20011
parameter
≤0.5 M salt concentration, 0-100% organic solvent, 0.22 mL/min flow rate, 10-80 °C temperature, 20 bar max. pressure
technique(s)
HPLC: suitable
L × I.D.
5 cm × 2 mm
matrix
hydroxylated methacrylic polymer
matrix active group
ammonium ion, quaternary phase
particle size
7 μm
operating pH
2-12
separation technique
mixed mode
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General description
TSKgel® VMpak-25 columns are specialty columns for the analysis of basic drugs that are often difficult to retain with good peak shape on alkyl-bonded reversed phase columns. The packing material in TSKgel VMpak-25 columns is a hydrophilic vinyl polymer gel (7 μm), similar to that in TSKgel Alpha-2500 size-exclusion columns, although the column dimensions are more appropriate for non-SEC applications. Depending on the mobile phase composition, compounds will be retained by a combination of reverse phase and cation exchange on residual carboxylic acid groups.
Legal Information
TSKgel is a registered trademark of Tosoh Corporation
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