CHEMICAL TEST OF PHOSPHATES IN URINARY CALCULI BY MEANS OF THE CHROMOGRAPHIC CONTACT PRINT METHOD

Abstract

The chromographic contact print method making use of ammonium phosphomolybdate-ascorbic acid reaction is valid to detect phosphates in urinary calculi. This sensitive reaction may take place even if phosphates, especially apatite, are contained in calculi in so small amounts as to be under the confirmation-limits of X-ray and infrared analyses. This method with the aid of X-ray, infrared, or other means is valid to reveal the distribution-figure of apatite in urinary calculi.