Rapid immunochemical determination of plasma fibronectin with a centrifugal analyzer.

We report a turbidimetric procedure, using commercially available reagents, for the determination of plasma fibronectin with an unmodified centrifugal analyser. Fixed-time kinetic readings at 340 nm were taken at 60 and 720 s. A wide range of concentration (up to 1000 mg/l) can be measured. Precision and accuracy were quite acceptable. Correlation with radial immunodiffusion was satisfactory. This automated procedure, simple and rapid, allows extensive studies of fibronectin in various diseases.