Bepaling van citroenzuur in diervoeder: enzymatische bepaling van citroenzuurgehalte— NADH (gereduceerde vorm van nicotinamide-adenine-dinucleotide) spectrometrische methode.
Determination of citric acid in feedingstuff: enzymatic determination of citric content-NADH (reduced form of nicotinamide adenine dinucleotide) spectrometric method.