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Headspace gas chromatographic method for determining volatile compounds in infant formulas
M Romeu-Nadal1, A I Castellote, M C López-Sabater
1Dept Nutrició i Bromatologia, Centre de Referència en Tecnologia dels Aliments, Facultat de Farmàcia, Universitat de Barcelona, Avda Joan XXIII s/n, Barcelona 08028, Spain.
Journal of Chromatography. A
|September 25, 2004
Summary
A new headspace gas chromatography method quickly detects key volatiles like propanal, pentanal, and hexanal in infant formula. This rapid analysis indicates formula oxidation and potential quality deterioration.
Area of Science:
- Food Science
- Analytical Chemistry
- Quality Control
Background:
- Powdered infant formula quality is compromised by oxidation, leading to off-flavors.
- Spoilage volatiles are primary indicators of formula deterioration and shortened shelf life.
Purpose of the Study:
- To develop a rapid headspace gas chromatographic method for detecting key oxidation volatiles in infant formula.
- To establish a reliable analytical technique for assessing the oxidative status of powdered infant formula.
Main Methods:
- Headspace gas chromatography (HS-GC) was employed to quantify propanal, pentanal, and hexanal.
- Optimum conditions were determined for detection and quantification limits, linearity, and precision.
Main Results:
- The method achieved low limits of detection (16.87–19.60 ng) and quantification (31.96–37.37 ng) for the target volatiles.
- Calibration curves demonstrated excellent linearity (R² > 0.99) across specified ranges.
- High precision was observed, with relative standard deviations for repeatability and reproducibility between 2.2% and 5.5%.
Conclusions:
- The developed HS-GC method is simple, rapid, and reliable for assessing infant formula oxidation.
- This technique allows for the analysis of numerous samples using small volumes, facilitating efficient quality control.