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[Determining riboflavin level in urine (comparative analysis of the methods)]
Voprosy Pitaniia
|May 1, 1991
Summary
This study compared four riboflavin estimation methods in urine. Methods using riboflavin-binding protein and fluorescence suppression are recommended for large-scale clinical use due to their simplicity, specificity, and sensitivity.
Area of Science:
- Biochemistry
- Clinical Chemistry
- Analytical Chemistry
Background:
- Accurate riboflavin (vitamin B2) quantification in urine is crucial for assessing nutritional status and monitoring health.
- Existing methods for riboflavin estimation vary in complexity, specificity, and sensitivity, necessitating comparative studies.
Purpose of the Study:
- To evaluate and compare four distinct methods for quantifying riboflavin content in urine samples.
- To determine the most suitable methods for routine clinical use and large-scale investigations.
Main Methods:
- Specific titration using riboflavin-binding protein.
- Riboflavin decomposition via alkaline boiling.
- Riboflavin fluorescence suppression by dithionate.
- High-performance liquid chromatography (HPLC).
Main Results:
- All four methods demonstrated good correlation, with regression equations established.
- Methods 1 (riboflavin-binding protein titration) and 3 (fluorescence suppression) were identified as highly simple, specific, and sensitive.
- A need for a standardized in-house calibration for methods 1-3 was highlighted.
Conclusions:
- Methods 1 and 3 are recommended for widespread adoption in large-scale clinical investigations owing to their optimal performance characteristics.
- Standardization of these methods is essential for reliable and reproducible riboflavin measurements in clinical settings.