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Related Experiment Videos

An improved pyrogallol red-molybdate method for determining total urinary protein.

J L Orsonneau1, P Douet, C Massoubre

  • 1Laboratoire de Chimie A--C.H.R. Hôtel-Dieu, Nántes, France.

Clinical Chemistry
|November 1, 1989
PubMed
Summary
This summary is machine-generated.

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This study adapted the pyrogallol red-molybdate method for total urinary protein measurement on the Cobas Bio analyzer. The modified assay is simple, rapid, sensitive, and cost-effective for clinical use.

Area of Science:

  • Clinical Chemistry
  • Analytical Biochemistry

Background:

  • Accurate measurement of total urinary protein is crucial for diagnosing and monitoring kidney diseases.
  • Existing methods may lack the speed, sensitivity, or cost-effectiveness required for routine clinical laboratory use.

Purpose of the Study:

  • To adapt and validate the pyrogallol red-molybdate method for total urinary protein determination using the Cobas Bio centrifugal analyzer.
  • To ensure accurate and reliable protein quantification by modifying reagent reactivities.

Main Methods:

  • Adaptation of the pyrogallol red-molybdate assay for automated analysis on the Cobas Bio centrifugal analyzer.
  • Addition of sodium dodecyl sulfate to the reagent to standardize the chromogenicity of different proteins, such as albumin and gamma globulins.
  • Comparison of results with a reference method involving gel filtration and a modified biuret reaction.

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Main Results:

  • The adapted method demonstrated simplicity, rapidity, sensitivity, and cost-effectiveness.
  • Standardization of protein reactivities was achieved by adding sodium dodecyl sulfate.
  • High correlation (r = 0.951) was observed between the adapted method and the comparison method.

Conclusions:

  • The pyrogallol red-molybdate method, adapted for the Cobas Bio analyzer, provides a reliable and efficient means for quantifying total urinary protein.
  • This validated method offers a practical solution for routine clinical laboratories, enhancing diagnostic capabilities for renal conditions.