Fast headspace-enantioselective GC-mass spectrometric-multivariate statistical method for routine authentication of flavoured fruit foods

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• 作者：Cecilia Cagliero ; Carlo Bicchi ; ^{carlo.bicchi@unito.it} ; Chiara Cordero ; Patrizia Rubiolo ; Barbara Sgorbini ; Erica Liberto
• 关键词：Flavoured fruit products ; Chiral marker ; Non-equilibrium headspace-SPME ; Enantioselective GC&ndash ; MS ; Multivariate statistical methods
• 刊名：Food Chemistry
• 出版年：2012
• 出版时间：15 May 2012
• 年：2012
• 卷：132
• 期：2
• 页码：1071-1079
• 全文大小：415 K

文摘

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 ¦Ã- and ¦Ä-lactones as chiral markers, strawberry (¦Á-ionone, linalool, nerolidol, ethyl 2-methylbutyrate, 2-methylbutyric acid and ¦Ã-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.