Coated Capillaries and buffers for CE

Protea  coated capillaries are provided with a proprietary chemical coating that allow sample separation without interference from capillary EOF.  Our coatings minimize adsorption of sample to the capillary walls, resulting in minimum sample loss and reproducible CE separations.  We provide standardized buffers for use with the coated capillaries.


  • Zero EOF interference

  • Low sample adsorption

  • Coatings are stable

  • 75um and 100um I.D. are available

  • Provided with Sodium Phosphate (pH7.0) and Sodium Tetraborate (pH9.2)

Coated Capillaries are provided in both 75mm and 100mm IDs,
for your convenience.  CE Grade buffers are tested and validated for
use in capillary electrophoresis procedures.


Separation of a six protein mixture on a (a) bare and (b) P-701 capillary. Separation conditions: a) Normal polarity, b) Reverse polarity. Buffer used is 50 mM sodium Borate at pH 9.2 (P-722), voltage applied is 330 Volts/cm.

Catalog # Description Unit Cost / Unit

Coated Capillaries

CE-101 75mm ID X 75 cm 1 $110
CE-102 100mm ID X 75 cm 1 $110


CE-200 Sodium Tetraborate Buffer, 25 mM, pH 9.2 100 mL $25
CE-202 Sodium Tetraborate Buffer, 50 mM, pH 9.2 100 mL $25
CE-210 Sodium Phosphate Buffer, 25 mM, pH 7.0 100 mL $25
CE-212 Sodium Phosphate Buffer, 50 mM, pH 7.0 100 mL $25

Purchase coated capillaries and buffers now...