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GFAAS determination of selenium in infant formulas using a microwave digestion method
A Alegria1, R Barbera, R Farré
1Department of Nutrition and Food Chemistry, University of Valencia, Spain.
Die Nahrung
|January 1, 1994
Summary
A new method accurately measures selenium in infant formula using microwave digestion and graphite furnace atomic absorption spectrometry (GFAAS). This reliable technique ensures infant nutritional safety and formula quality control.
Area of Science:
- Analytical Chemistry
- Food Science
- Nutritional Science
Background:
- Accurate determination of essential trace elements like selenium is crucial for infant nutrition.
- Existing methods for selenium analysis in complex matrices such as infant formula may face challenges with interferences and sensitivity.
Purpose of the Study:
- To develop and validate a precise and accurate method for quantifying selenium content in infant formulas.
- To ensure the safety and nutritional adequacy of infant formulas through reliable selenium analysis.
Main Methods:
- Wet digestion of infant formula samples using nitric acid and hydrogen peroxide in microwave-assisted Teflon bombs.
- Determination of selenium concentration via graphite furnace atomic absorption spectrometry (GFAAS).
- Interference checks and validation using a certified reference material.
Main Results:
- The developed method demonstrated a low limit of detection (19.4 ng/g).
- High precision was achieved with a relative standard deviation (RSD) of 2.2%.
- Accurate selenium content was confirmed through analysis of a reference material.
Conclusions:
- The proposed method is reliable and suitable for routine determination of selenium in infant formulas.
- This validated method contributes to ensuring the quality and safety of infant nutritional products.
- The technique minimizes interferences, providing trustworthy analytical data for selenium levels.