Gelatin derivatives in blood: interference with the determination of inorganic phosphate in serum

The method of Goldenberg and Fernandez (1966) Clin. Chem. 12, 871--882) for the determination of inorganic phosphate in serum is significantly influenced by turbidity after intravenous application of gelatin derivatives, even at low quantities. This turbidity can be eliminated by the addition of sodium dodecyl sulphate to the reaction solution.