6533b7d5fe1ef96bd12648ea

RESEARCH PRODUCT

A headspace solid-phase microextraction method of use in monitoring hexanal and pentane during storage: Application to liquid infant foods and powdered infant formulas

María Jesús LagardaFernando RomeroGuadalupe Garcia-llatasRosaura FarréPedro Abellán

subject

Detection limitChromatographyInfants AlimentacióFood storageGeneral MedicineSolid-phase microextractionHexanalAnalytical ChemistryPentanechemistry.chemical_compoundchemistryLipid oxidationSolid phase extractionFood Science

description

The determination of two secondary lipid oxidation compounds (hexanal and pentane) in liquid infant foods using a headspace solid-phase microextraction gas chromatographic (HS-SPME-GC) method has been developed and validated. The HS-SPME analytical conditions (fibre position, equilibration and sampling times) were selected. The analytical parameters of the method (linearity: hexanal from 2.48 to 84.78 ng/g, pentane from 6.21 to 79.55 ng/g; precision: hexanal 2.87%, pentane 2.343.46%; recovery: hexanal 106.60%, pentane 95.39%; detection limit: hexanal 3.63 ng and pentane 4.2 ng) demonstrate the usefulness of the method. Once optimized, the method was applied to liquid infant foods based on milk and cereals, and to powdered adapted and follow-up milk-based infant formulas (IF), stored for four and seven months. In all cases the hexanal content was higher in IF than in milk-cereal based infant foods. No pentane was found in IF.

yearjournalcountryeditionlanguage
2006-01-01
10.1016/j.foodchem.2006.03.007http://hdl.handle.net/10550/33380