Determination of 2-alkylcyclobutanones with electronic impact and chemical ionization gas chromatography/mass spectrometry (GC/MS) in irradiated foods.
The use of a column containing 60 g of silica gel for cleanup and the use of isobutane as a reactant reagent for chemical ionization-mass spectrometric analysis of the saturated and monounsaturated alkyl side-chain 2-alkylcyclobutanones (2-ACBs; specifically induced by irradiation from fat in foods until the proof of contrary) has improved both the sensibility and the selectivity of the method when applied for the detection of irradiated foods. The quality of the chromatograms obtained was improved, allowing the detection of food samples (avocados) irradiated at low doses (0.1 kGy) or irradiated ingredients included in low proportions (less than 5%, wt/wt) in nonirradiated culinary foods. These analytical modifications for the detection of 2-ACBs on the official EN 1785 method enable an extension of its current field of application using common equipment of food quality control laboratories.
Laboratoire de Chimie Analytique et Sciences de l'Aliment (LC4, UMR 7178), Faculté de Pharmacie, Université Louis Pasteur, 74, route du Rhin, 67400 Illkirch, France.
Peter
P
Horvatovich
Dalal
D
Werner
Stephanie
S
Jung
Michel
M
Miesch
Henry
H
Delincee
Claude
C
Hasselmann
Eric
E
Marchioni
D000473:Alkanes / Q000032:analysis* / Q000737:chemistry; D000818:Animals; D003503:Cyclobutanes / Q000032:analysis* / Q000737:chemistry; D004041:Dietary Fats / Q000032:analysis; D005504:Food Analysis; D005514:Food Irradiation; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D027421:Persea / Q000737:chemistry; D011200:Poultry; D012474:Salmon; D014280:Triglycerides / Q000737:chemistry
D000473:Alkanes; D003503:Cyclobutanes; D004041:Dietary Fats; D014280:Triglycerides