Biochemical Assay Urine Protein Sulfosalicylic Acid Precipitation Test SCDO:0001215 Urine Turbidimetry with Sulfosalicylic Acid Urine Sulfosalicylic Acid Turbidimetry SSA Protein Precipitation Test Sufficient MMO:0000504 A method in which sulfosalicylic acid (that is, the SSA reagent) is added to a small and equal volume of clear urine. The acidification causes precipitation of protein in the sample (seen as increasing turbidity), which can be subjectively quantitated visually or more precisely quantitated using photometry. Urine SSA Turbidimetry http://purl.obolibrary.org/obo/MMO_0000504