Efficient Estimation of ascorbic acid in vitamin C tablets enabled by phase-transfer strategy

Area of Science:

• Analytical Chemistry
• Pharmaceutical Analysis

Background:

• Ascorbic acid (vitamin C) is a vital nutrient, and its accurate quantification in supplements is crucial.
• Traditional methods for ascorbic acid determination can be time-consuming and prone to errors, especially in batch analysis.

Purpose of the Study:

• To develop and validate a novel, efficient phase-transfer strategy for the batch detection of ascorbic acid in vitamin C tablets.
• To leverage headspace gas chromatography (GC) for sensitive and precise indirect quantification of ascorbic acid.

Main Methods:

• A phase-transfer reaction involving ascorbic acid and potassium permanganate.
• Quantification of residual potassium permanganate via reaction with sodium oxalate to produce carbon dioxide.
• Measurement of generated carbon dioxide using headspace GC for indirect ascorbic acid determination.

Main Results:

• The headspace GC method demonstrated high precision, with a relative standard deviation below 2.11%.
• The method exhibited excellent sensitivity, achieving a limit of quantitation of 0.27 μmol.
• The developed approach proved reliable for ascorbic acid determination in vitamin C tablets.

Conclusions:

• The novel phase-transfer strategy combined with headspace GC offers an efficient, precise, and sensitive method for ascorbic acid analysis.
• The automated nature of headspace GC enhances batch sample detection efficiency and minimizes human operational errors.
• This method is highly suitable for large-scale industrial analysis of ascorbic acid in pharmaceutical products.