[Semiautomatic method of measurement of serum 5'nucleotidase activity].

A semi-automated method for determining the 5'-nucleotidase activity in human serum for use with the Technicon Autoanalyzer I is described. Based upon the manual method of Persijn and Van Der Slik, adenosine formed by hydrolysis of 5'-AMP is deamined enzymatically and ammonia determined with the Berthelot reaction. The non specific alkaline phosphatases are inhibited by phenylphosphate. Concentrations of 5'-AMP and phenylphosphate are discussed. Nucleotidase activity is determined without dilution up to a value of 210 UI/liter. The precision is better than other manual or semi-automated methods in current use.