Triacylglycerols profiling as a chemical tool to identify mushrooms submitted to gamma or electron beam irradiation.
In order to define irradiation treatment as a routine conservation methodology, it is imperative to develop chemometric indicators with the ability to distinguish irradiated from unirradiated foodstuffs. Electron spin resonance, photostimulated luminescence and thermoluminescence methods were employed to monitor radiation-induced markers, as well as different chemical compounds produced from the lipidic fraction of different foodstuffs. Apart from these methods, the specificity of triacylglycerol profiles has previously been detected in mushroom species, as has the effect of irradiation treatment in the triacylglycerol profiles of chestnut. Accordingly, the feasibility of using this as a chemometric indicator of irradiated mushrooms was evaluated. In line with the obtained results in literature, the effects of each type of irradiation were significantly different, as can be concluded from the correlations among discriminant functions and variables within each statistical test. Triacylglycerol profiling proved to be a useful tool to detect irradiated mushrooms, independently of the species or irradiation source, especially for doses above 1 kGy.
Centro de Investigação de Montanha, ESA, Instituto Politécnico de Bragança, Campus de Santa Apolónia, Apartado 1172, 5301-855 Bragança, Portugal; REQUIMTE/Depto. de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua Jorge Viterbo Ferreira n.° 228, 4050-313 Porto, Portugal.
Ângela
Â
Fernandes
Centro de Investigação de Montanha, ESA, Instituto Politécnico de Bragança, Campus de Santa Apolónia, Apartado 1172, 5301-855 Bragança, Portugal; REQUIMTE/Depto. de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua Jorge Viterbo Ferreira n.° 228, 4050-313 Porto, Portugal.
João C M
JC
Barreira
Centro de Investigação de Montanha, ESA, Instituto Politécnico de Bragança, Campus de Santa Apolónia, Apartado 1172, 5301-855 Bragança, Portugal; IST/ITN, Instituto Tecnológico e Nuclear, Estrada Nacional 10, 2686-953 Sacavém, Portugal; Departamento de Física Fundamental, Universidade de Salamanca, Plaza de la Merced, 37008 Salamanca, Spain.
Amilcar L
AL
Antonio
Centro de Investigação de Montanha, ESA, Instituto Politécnico de Bragança, Campus de Santa Apolónia, Apartado 1172, 5301-855 Bragança, Portugal.
Anabela
A
Martins
Centro de Investigação de Montanha, ESA, Instituto Politécnico de Bragança, Campus de Santa Apolónia, Apartado 1172, 5301-855 Bragança, Portugal. Electronic address: iferreira@ipb.pt.
Isabel C F R
IC
Ferreira
REQUIMTE/Depto. de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua Jorge Viterbo Ferreira n.° 228, 4050-313 Porto, Portugal.
M Beatriz P P
MB
Oliveira
D000363:Agaricales / Q000737:chemistry*; D004578:Electron Spin Resonance Spectroscopy; D004583:Electrons; D005514:Food Irradiation; D005720:Gamma Rays; D049449:Luminescence; D014280:Triglycerides / Q000032:analysis*
D014280:Triglycerides
Chemometrics; Electron beam; Gamma irradiation; Triacylglycerols; Wild mushrooms