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Atomic Absorption Spectroscopy: Lab01:21

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For AAS measurements, samples must be introduced as clear solutions, often requiring extensive preliminary treatment to dissolve materials like soils, animal tissues, and minerals. Common methods for sample preparation include treatment with hot mineral acids, wet ashing, combustion in closed containers, high-temperature ashing, or fusion with reagents.
 Solutions containing organic solvents, such as low-molecular-mass alcohols, esters, or ketones, enhance absorbances by increasing...
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Acrylamide Determination in Infant Formulas: A New Extraction Method.

Sumeyra Sevim1,2, Rosalia Lopez-Ruiz2, Antonia Garrido-Frenich2

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Summary
This summary is machine-generated.

Acrylamide (AA) is a potential contaminant in infant formula. A new LC-MS method accurately detects AA, revealing significant variations across formula types and emphasizing the need for ongoing safety monitoring.

Keywords:
LCMSacrylamideinfant formulamilksample preparation

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Area of Science:

  • Food Chemistry
  • Analytical Chemistry
  • Toxicology

Background:

  • Infant formulas are essential alternatives to breastfeeding for infants unable to be exclusively breastfed.
  • Thermal processing during infant formula production can lead to the formation of acrylamide (AA), a potential carcinogen.
  • Existing analytical methods for AA are often complex, costly, and time-consuming, limiting routine analysis in diverse food matrices.

Purpose of the Study:

  • To develop and validate a robust liquid chromatography-mass spectrometry (LC-MS) method for accurate acrylamide detection in infant formula.
  • To assess acrylamide levels in various commercially available infant formula samples.
  • To investigate the variability of acrylamide concentrations across different types of infant formulas.

Main Methods:

  • A novel LC-MS protocol involving sequential hydration, acetonitrile precipitation, and dual-sorbent clean-up was established.
  • Method validation included linearity, matrix effect, sensitivity (LOD/LOQ), and recovery assessments.
  • Acrylamide was quantified in 31 infant formula samples, including cow's milk-based, goat's milk-based, plant-based, amino acid-based, and cereal-based formulas.

Main Results:

  • The validated LC-MS method demonstrated excellent linearity (R² > 0.99), good sensitivity (LOD: 10 µg/kg, LOQ: 20 µg/kg), and consistent recovery (82-99%).
  • Acrylamide was detected in all analyzed infant formulas, with the highest individual level (268.2 µg/kg) in an amino acid-based formula.
  • Mean AA concentrations varied significantly by formula type, with cereal-based formulas showing the highest levels (188.1 ± 100.8 µg/kg), followed by goat's milk-based, plant-based, and cow's milk-based formulas (p < 0.001).

Conclusions:

  • The developed LC-MS method provides a reliable and efficient tool for acrylamide analysis in infant formula.
  • Significant variability in acrylamide levels exists among different infant formula types, influenced by ingredients and processing.
  • Continuous monitoring of acrylamide in infant foods is crucial to ensure infant safety and inform regulatory standards.