“…A number of grape and wine profiling studies have used HS-SPME to better understand the role of various compounds in differentiating varieties, regions, and wine vintage (Marengo et al 2002, Câmara et al 2007, Setkova et al 2007b, Robinson et al 2011c, and the technique has been repeatedly documented as a sensitive, reproducible, automated method for preconcentration of wine volatiles prior to analysis (Howard et al 2005, Câmara et al 2006, Setkova et al 2007a. Various parameters are routinely optimized in the development of HS-SPME techniques for the analysis in wine of ethyl esters, acetates, acids, and alcohols (Siebert et al 2005), monoterpenes and norisoprenoids (Câmara et al 2006), methoxypyrazines (Hartmann et al 2002, Ryona et al 2009), thiols, sulfides, and disulfides (Mestres et al 1999a(Mestres et al , 1999b, and furfural derivatives, phenolic aldehydes, volatile phenols, and oak lactones (Carrillo et al 2006). Most methods described within the literature explore parameters such as fiber type, sample temperature, salt concentration, agitation speed, and extraction time as part of method development and optimization (Sala et al 2000, Rocha et al 2001, Silva Ferreira and Guedes de Pinho 2003, Howard et al 2005, Câmara et al 2006, Carrillo et al 2006, Setkova et al 2007a, Robinson et al 2011b).…”