urine total protein analysis urine protein sulfosalicylic acid precipitation test 2014-02-07T11:53:04Z 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. MMO:0000504 SSA protein precipitation test jsmith measurement_method_ontology urine SSA turbidimetry urine sulfosalicylic acid turbidimetry urine turbidimetry with sulfosalicylic acid