Bicchi, Carlo

Cagliero, Cecilia Lucia

Jared, Anderson

Mazzucotelli, Maria

Sgorbini, Barbara

Stefano, Galli

English

Institutional Research Information System University of Turin

IONIC LIQUIDS AS GC STATIONARY PHASES IN THE FLAVOUR AND FRAGRANCEFIELD????????????????????????????????????????????????????????????????????????????????????????????????????????1 DSTF - University of Torino, Via Pietro Giuria 9, 10125 Torino, Italy2 Department of Chemistry - Iowa State University, Gilmann Hall, 50011 Ames, United States3 MEGA S.r.l., Via Plinio, 29,  20025 Legnano (MI), ItalyAnalyses of essential oils and natural fragrances cover a wide range of subjects going fromquality control to marker identification and quantitation. The present trend implies that thechromatographic system provides a combination of efficiency and selectivity suitable to give abaseline separation of all markers in a single analytical run. Samples in these fields are, ingeneral, complex and often consist of isomeric components with similar structural and physicalcharacteristics (e.g., mono- and sesquiterpenoids). Isomeric compounds are sometimes difficultto identify because of their similar mass spectra that makes chromatographic data indispensablefor their correct identification, and, often challenging to separate with conventional GC stationaryphases. A continual search for new stationary phases with different selectivity and with goodchromatographic properties, is therefore necessary to obtain separation patterns different fromand/or complementary to those currently used based on polysiloxanes and polyethylene glycol.This lecture will explore the potential of IL stationary phases when applied to the GC analysisof essential oils  and natural fragrances. Ionic liquids (ILs) as routine stationary phases for GCwere commercially introduced in 2010 [1], and have opened new perspectives thanks to theirpeculiar and uncommon selectivity different from that of the above stationary phases used inroutine. In 2016, the second generation of highly inert columns was commercialized: theyafforded to overcome some problems of inertness with polar analytes empasized from thoseof the first generation [2]. At the same time, a set of fully-water-compatible ionic-liquid (IL)-basedGC capillary columns especially dedicated to the analysis of water was made commerciallyavailable [3]. Their use was very recently extended to the analysis of fragrances and productsderiving from essential oils where water or ethanol/water are the main solvent. The second partof this lecture will deal with the application of two new groups of IL derivatives very recentlyproposed as GC stationary phases of high interest for the flavor and fragrance field. The firstIL group is based on phosphonium cation combined with different anions [4], while the secondone consists of metal-containing ILs (MCILs) [5]. In particular, the latter are based on trihexyl(tetradecyl)phosphonium cation and functionalized acetylacetonate ligands chelated toManganese (II) and Dysprosium (III)References[1] C. Cagliero, C. Bicchi, C. Cordero, E. Liberto, B. Sgorbini, P. Rubiolo - J. Chromatogr. A,1268 (2012) 130– 138[2] C. Cagliero, C. Bicchi, C. Cordero, E. Liberto, P. Rubiolo, B. Sgorbini - J. Chromatogr. A,1495 (2017) 64–75[3] C. Cagliero, C. Bicchi, C. Cordero, E. Liberto, P. Rubiolo, B.  Sgorbini, Anal. Bioanal. Chem.2018, DOI : 10.1007/s00216-018-0922-0[4] Hantao LW, Najafi A, Zhang C, Augusto P, Anderson JL. - Anal. Chem. 2014;86(8):3717-21.[5] H. Nan, L. Peterson, J. L. Anderson - Anal. Bioanal. Chem. Accepted for publicationLE.81 Giovanni Dugo Award Lecture142

Ionic liquids as GC stationary phases in the flavour and fragrance field

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Ionic liquids as GC stationary phases in the flavour and fragrance field

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