Vivafree™ Centrifugal Filters

BJP Clinical Concentrators

Replaces Minicon® B15 & CS15

BJP concentrators use ultrafiltration membranes to concentrate proteins without the need for centrifuges. Integrated dead-stops ensure the highest concentration factors while avoiding sample concentration to dryness. These devices are used widely for urine and spinal fluid samples prior to electrophoresis and immunofixation.

BJP 5 Static Concentrator

Up to 5ml starting volume
Concentrate up to 100x

BJP 10 Static Concentrator

Up to 10ml starting volume
Concentrate up to 200x

BJP 20 Static Concentrator

Up to 20ml starting volume (with optional resevoir)
Concentrate up to 200x

Urine Protein Concentration Calculations

This calculations app provides a table of concentration factors (CF) for your urine electrophoresis samples. It assumes that you first measure your sample Total Protein and then desire to adjust the CF accordingly.

New Recommendations for CAP Procedures

Download the latest CAP Validation Procedures (rev. 2/3/23) (PDF) and the CAP Recovery Calculation Sheet (XLS).

Urine Protein Concentration with Vivaproducts Devices

Download this Applications Note about using Vivaproducts concentrators for urine protein electrophoresis samples.

Vivafree™ Centrifugal Filters

Replaces Centrifree® Filters

Vivafree™ centrifugal filters offer rapid, accurate separations of free drug samples such as phenytoin and valproic acid for Therapeutic Drug Monitoring. Savings of 35% or more have been reported when switching to Vivafree™ from Centrifree® filters. These devices are intended for in vitro diagnostic (IVD) applications.

Vivafree™ 2 Centrifugal Filter

Up to 2 ml starting sample volume

Vivafree™ 500 Centrifugal Filter

Up to 500 µl starting sample volume

Free Drug & Hormone Separations with Vivafree™ Filters

Download this Applications Note to see how Vivafree™ filters can be used to prepare samples for therapeutic drug monitoring of phenytoin, valproic acid and digoxin. They can also separate free testosterone, insulin and cortisol in clinical samples.