Direct analysis for urinary protein with biuret reagent, with use of urine ultrafiltrate blanking: comparison with a manual biuret method involving trichloroacetic acid precipitation.

J. H. Eckfeldt, M. J. Kershaw, I. I. Dahl

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

We describe a method for measuring urinary protein with a centrifugal analyzer. Biuret reagent is used, and blanking with an ultrafiltrate of urine eliminates interferences from the nonprotein, biuret-positive chromogens in urine. We compare results by this new method with those by a manual method in which trichloroacetic acid precipitation and biuret reagent are used. The new method shows good precision and excellent correlation (r = 0.997) with the manual method. The ease and convenience of this assay should make this a useful method for the routine clinical laboratory.

Original languageEnglish (US)
Pages (from-to)443-446
Number of pages4
JournalClinical chemistry
Volume30
Issue number3
DOIs
StatePublished - Mar 1984

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