HPLC columns, Cogent UDA™

HPLC columns, Cogent UDA™

These carboxylic acid HPLC columns have a silica hydride surface similar to other TYPE-C™ Silica phases but the uniqueness of Cogent UDA™ is that they can exhibit weak cation exchange properties in addition to RP and ANP retention; a mixed mode is possible with some mobile phases conditions.

Weak cation
Mixed mode

A terminal carboxylic acid group contributes some additional selectivity in this column and when the mobile phase is above pH 5,9, the acid group becomes 90% negatively charged and at pH 6,9 is 99% charged and may act as a cation exchanger. Below pH 4,9, the group does not have significant ion exchange properties.

Catalog No:
554-6241
554-6246
554-6245
554-6260
554-6237
554-6240
554-6242
554-6269
554-6268
554-6499
554-6280
554-6486
554-6267
554-6250
554-6279
554-6247
554-6493
554-6236
554-6235
554-6490
554-6489
554-6270
554-6494
554-6278
554-6277
554-6275
554-6274
554-6273
554-6272

Carbon load:
14 - 15%
14 - 15%
14 - 15%
14 - 15%
14 - 15%
14 - 15%
14 - 15%
14 - 15%
14 - 15%
14 - 15%
14 - 15%
14 - 15%
14 - 15%
14 - 15%
14 - 15%
14 - 15%
14 - 15%
14 - 15%
14 - 15%
14 - 15%
14 - 15%
14 - 15%
14 - 15%
14 - 15%
14 - 15%
14 - 15%
14 - 15%
14 - 15%
14 - 15%

Endcapped:
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No

pH range:
2 - 8
2 - 8
2 - 8
2 - 8
2 - 8
2 - 8
2 - 8
2 - 8
2 - 8
2 - 8
2 - 8
2 - 8
2 - 8
2 - 8
2 - 8
2 - 8
2 - 8
2 - 8
2 - 8
2 - 8
2 - 8
2 - 8
2 - 8
2 - 8
2 - 8
2 - 8
2 - 8
2 - 8
2 - 8

Surface area:
390 m²/g
390 m²/g
390 m²/g
390 m²/g
390 m²/g
390 m²/g
390 m²/g
390 m²/g
390 m²/g
340 m²/g
390 m²/g
340 m²/g
390 m²/g
390 m²/g
390 m²/g
390 m²/g
340 m²/g
390 m²/g
390 m²/g
340 m²/g
340 m²/g
390 m²/g
340 m²/g
390 m²/g
390 m²/g
390 m²/g
390 m²/g
390 m²/g
390 m²/g

Temperature limit:
80 °C
80 °C
80 °C
80 °C
80 °C
80 °C
80 °C
80 °C
80 °C
80 °C
80 °C
80 °C
80 °C
80 °C
80 °C
80 °C
80 °C
80 °C
80 °C
80 °C
80 °C
80 °C
80 °C
80 °C
80 °C
80 °C
80 °C
80 °C
80 °C

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