Assay for Water-Soluble Vitamins in Vitamin Tablets Using a Thermo Scientific ™ Acclaim™ PolarAdvantage (PA) Column

Significance of the topic

Water soluble vitamins play essential roles in human health, and supplements containing these compounds must be tested to verify label claims and ensure consumer safety. Analytical methods offering reliable separation and quantification of these hydrophilic analytes in complex tablet matrices are critical for quality control in the pharmaceutical and nutraceutical industries.

Study objectives and overview

This application note describes the development of an HPLC assay for eight water soluble vitamins in a commercial multivitamin tablet using a Thermo Scientific Acclaim PolarAdvantage PA column. The goals were to achieve baseline resolution of thiamine, riboflavin, nicotinamide, pantothenic acid, pyridoxine, folic acid, ascorbic acid, and vitamin B12 in a single run under fully aqueous conditions.

Methodology and instrumention

• Column: Acclaim PolarAdvantage PA, 3 μm particle size, 4.6 × 150 mm
• Mobile phase: Phosphate buffer at pH 3.4, gradient elution to 20% acetonitrile over 17 minutes
• Detection: Diode array detector scanning at primary and confirmatory wavelengths (210, 246, 265, 285, 340 nm)
• Sample preparation:
  1. Grind a 1500 mg tablet
  2. Extract 150 mg powder in 100 mL pH 3.4 buffer
  3. Sonicate for 10 minutes and filter
  4. Inject 20 μL of extract

Main results and discussion

The method provided clear separation of all eight vitamins within a 17-minute run. Retention times ranged from early elution of the highly polar thiamine to later elution of riboflavin. The fully aqueous phosphate buffer maintained column wettability and stable retention, avoiding dewetting issues common with C18 phases under these conditions. Multiple detection wavelengths enhanced specificity and allowed confirmation of each analyte peak.

Benefits and practical applications

• Robust separation of hydrophilic vitamins in a single analysis
• High throughput with a short gradient and run time
• Reliable aqueous operation prevents dewetting and retention shifts
• Diode array detection offers simultaneous quantitation and confirmation

Future trends and possibilities

Advances in stationary phase design may further improve selectivity for structurally similar vitamins. Integration of mass spectrometry detection could enhance sensitivity and broaden the scope to trace-level impurities. Automation of sample preparation and online solid phase extraction are promising developments to increase throughput and reproducibility.

Conclusion

The described HPLC method using the Acclaim PolarAdvantage PA column delivers a fast, reliable, and robust assay for water soluble vitamins in multivitamin tablets. It supports rigorous quality control by achieving complete resolution under fully aqueous conditions, leveraging diode array detection for comprehensive peak confirmation.