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Determination of urinary 4-pyridoxic acid using high performance liquid chromatography
The American Journal of Clinical Nutrition
|April 1, 1979
Summary
This study presents a new HPLC method for measuring 4-pyridoxic acid, a vitamin B6 metabolite, in urine. The rapid, sensitive technique is ideal for nutritional and metabolic research.
Area of Science:
- Biochemistry
- Analytical Chemistry
- Nutritional Science
Background:
- Vitamin B6 is essential for numerous metabolic processes.
- 4-pyridoxic acid is the primary urinary metabolite of vitamin B6.
- Accurate quantification of 4-pyridoxic acid is crucial for assessing vitamin B6 status.
Purpose of the Study:
- To develop and validate a high-performance liquid chromatographic (HPLC) method for the precise determination of 4-pyridoxic acid in human urine.
- To provide a sensitive and rapid analytical technique for use in metabolic and nutritional studies.
Main Methods:
- Urine samples were deproteinized using trichloroacetic acid.
- Chromatographic separation was performed on a reverse-phase octadecylsilica column.
- Detection was achieved using a fluorometric detector with a mobile phase of phosphate buffer and methanol.
Main Results:
- The developed HPLC method demonstrated high precision and accuracy.
- The absence of interfering compounds in urine samples was confirmed.
- The method proved to be sensitive and quantitative for 4-pyridoxic acid measurement.
Conclusions:
- The presented HPLC method is a reliable tool for quantifying urinary 4-pyridoxic acid.
- This technique facilitates accurate assessment of vitamin B6 metabolism and nutritional status.
- The method's speed and sensitivity make it suitable for large-scale studies.