This study describes a rapid total analysis system (TAS) to detect the authenticity of fruit-flavoured foods and beverages by on-line combining headspace solid phase microextraction (HS-SPME) with enantioselective GC–MS (Es-GC–MS) and statistical multivariate methods (PCA, HCA). Peach, coconut, apricot, raspberry, as fruits mainly characterised by c- and d-lactones as chiral markers, strawberry (a-ionone, linalool, nerolidol, ethyl 2-methylbutyrate, 2-methylbutyric acid and c-lactones) and melon (ethyl 2- methylbutyrate and 2-methylbutanol) were investigated. The system was developed by (a) optimising non-equilibrium HS-SPME sample preparation, (b) speeding-up ES-GC using cyclodextrin derivatives as chiral selectors with conventional and narrow-bore columns and (c) elaborating data by multivariate methods. The resulting TAS affords a reduction of the time needed for the whole analytical process from about 150 min to 20–50 min (67–87% of the current routine method) depending on matrix, sampling and analysis conditions and Es-GC columns.
Fast headspace-enantioselective GC-mass spectrometric-multivariate statistical method for routine authentication of flavoured fruit foods
CAGLIERO, Cecilia Lucia;BICCHI, Carlo;CORDERO, Chiara Emilia Irma;RUBIOLO, Patrizia;SGORBINI, Barbara;LIBERTO, Erica
2012-01-01
Abstract
This study describes a rapid total analysis system (TAS) to detect the authenticity of fruit-flavoured foods and beverages by on-line combining headspace solid phase microextraction (HS-SPME) with enantioselective GC–MS (Es-GC–MS) and statistical multivariate methods (PCA, HCA). Peach, coconut, apricot, raspberry, as fruits mainly characterised by c- and d-lactones as chiral markers, strawberry (a-ionone, linalool, nerolidol, ethyl 2-methylbutyrate, 2-methylbutyric acid and c-lactones) and melon (ethyl 2- methylbutyrate and 2-methylbutanol) were investigated. The system was developed by (a) optimising non-equilibrium HS-SPME sample preparation, (b) speeding-up ES-GC using cyclodextrin derivatives as chiral selectors with conventional and narrow-bore columns and (c) elaborating data by multivariate methods. The resulting TAS affords a reduction of the time needed for the whole analytical process from about 150 min to 20–50 min (67–87% of the current routine method) depending on matrix, sampling and analysis conditions and Es-GC columns.File | Dimensione | Formato | |
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FoodChem132(2012)1071_frutti.pdf
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Fast headspace-enantioselective GC-mass spectrometric-multivariate statistical method for routine authentication of flavoured fruit foods.pdf
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