title: Colorimetric determination of certain pteridines and purines.
mesh_terms: D000619:Aminohydrolases; D000814:Aniline Compounds; D000818:Animals; D001391:Azo Compounds; D003124:Colorimetry; D006147:Guanine / Q000032:analysis; D008722:Methods; D008892:Milk / Q000032:analysis; D011621:Pteridines / Q000032:analysis*; D011687:Purines / Q000032:analysis*; D013451:Sulfonic Acids; D014969:Xanthine Oxidase; D014970:Xanthines / Q000032:analysis / Q000097:blood
chemical_list: D000814:Aniline Compounds; D001391:Azo Compounds; D011621:Pteridines; D011687:Purines; D013451:Sulfonic Acids; D014970:Xanthines; D006147:Guanine; D014969:Xanthine Oxidase; D000619:Aminohydrolases