urine creatinine analysis by Jaffe reaction with spectrophotometric readout urine creatinine analysis by Jaffe reaction with deproteinization and spectrophotometric readout 2021-09-14T16:38:27Z A method for assaying creatinine in deproteinized urine (urine from which excess proteins have been removed) using the Jaffe reaction, the reaction of creatinine and picric acid in an alkaline solution, followed by quantitation of the colorimetric readout using a spectrophotometer at 520 nm. MMO:0000763 PMID:7411020 alkaline picrate urine creatinine assay with deproteinization and spectrophotometric readout measurement_method_ontology slaulede