Food Preservatives and Safety Assessment Techniques

Food preservatives encompass a wide array of chemical and natural agents employed to inhibit microbial growth, delay oxidative deterioration and extend the shelf life of perishable products. Synthetic preservatives such as benzoates, sorbates and parabens are widely used owing to their broad antimicrobial spectra, while natural alternatives—including plant extracts and bacteriocins—are gaining traction under clean-label initiatives. Ensuring the safety of these additives demands a combination of analytical, toxicological and exposure assessment approaches. Analytical chemistry platforms—ranging from chromatographic separation coupled with mass spectrometric detection to spectrophotometric screening—provide quantitative determination of preservative residues in complex matrices. Toxicity evaluation employs in vitro cytotoxicity assays, genotoxicity screens and in vivo models to characterise potential adverse effects. Finally, risk assessment integrates occurrence data with consumption patterns to calculate metrics such as hazard quotients and margins of exposure, thereby informing regulatory limits and guiding industry practice. Together, these techniques form a multidisciplinary framework that underpins global efforts to maintain food safety and consumer confidence.

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Food Preservatives and Safety Assessment Techniques publication trend

The graph below shows the total number of articles in food preservatives and safety assessment techniques across all publications each year (not limited to Nature Index journals).

Technical terms

Gas chromatography–mass spectrometry (GC-MS): An analytical technique that separates volatile compounds by gas chromatography and identifies them by mass spectrometry, offering high sensitivity for multi-residue detection.

High-performance liquid chromatography (HPLC): A separation method in which compounds are resolved on a packed column under high pressure and quantified by detectors such as UV or fluorescence.

UV–visible spectrophotometry: A technique measuring light absorbance in the ultraviolet and visible spectrum, commonly used for quantifying preservatives after extraction.

Limit of detection (LOD): The lowest concentration of a substance that can be reliably distinguished from a blank measurement under specified conditions.

Hazard quotient (HQ): A risk metric defined as the ratio of estimated exposure level to a reference dose, with values above one indicating potential health concerns.

References

1. Simultaneous Determination of 12 Preservatives in Pastries Using Gas Chromatography–Mass Spectrometry. Foods (2023).
2. Simultaneous determination of dehydroacetic acid, benzoic acid, sorbic acid, methylparaben and ethylparaben in foods by high-performance liquid chromatography. Food Science and Biotechnology (2023).
3. Analysis and Health Risk Assessment of Sodium Benzoate and Potassium Sorbate in Selected Fruit Juice and Soft Drink Brands in Nigeria. International Journal of Pharmacy and Chemistry (2020).