title: A new method for the determination of urinary poryphrins.
mesh_terms: D002482:Cellulose; D002845:Chromatography; D002852:Chromatography, Ion Exchange; D004586:Electrophoresis; D005069:Evaluation Studies as Topic; D006801:Humans; D008722:Methods; D011164:Porphyrias / Q000652:urine; D011166:Porphyrins / Q000302:isolation & purification / Q000652:urine*; D013053:Spectrophotometry; D013056:Spectrophotometry, Ultraviolet; D013627:Talc; D013997:Time Factors
chemical_list: D011166:Porphyrins; D013627:Talc; D002482:Cellulose