This company has introduced the KOVA Refractrol SP tri-level controls, used just like human serum. This product was designed for use with temperature compensated and non-compensated refractometers. Recovery of the assigned values provides assurance of measurements of plasma or serum protein concentration. Each level of Refractrol is separately packaged in easy-to-use 2mL vials and is stored at room temperature.
Hycor Biomedical Inc.