## 1 Introduction
\begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Analyt/Target** & **Method** & **Column** & **Extraction Procedure** & **Reference** \\ \hline
2,3-Butanediol, 2-Hydroxybutanone & GC-MS & CP Chirasil-Dex & LLE by ethyl acetate & [17] \\ \hline
4-Methylimidazole & GC-MS & DB-5 & LLE by BEHPA in chloroform & [18] \\ \hline Furan & GC-MS & SUPELCOWAX 10 & HS-SPME (DVB/CAR/PDMS) & [19] \\ \hline Furanic compounds & GC-MS & DB-Wax & HS-SPME (DVB/CAR/PDMS) & [20] \\ \hline Furanic compounds & GC-MS & Varian CPSil 8 CB & DHS-TDU (Tenax TA, Tenax GR) & [21] \\ \hline Furanic compounds & GC-MS; FID & ZB-Wax & HS-SPME (DVB/CAR/PDMS) & [22] \\ \hline Glucose a fructose acetates & GC-MS & DB-5 & SPE (silica), \\  & & & methylenchlorid/MeOH elu. & [23] \\ \hline Glycerol & GC-C-IRMS & Alltech Heliflex AT-WAX & & [24] \\ \hline Chiral amino acids & GC-MS & Chirasil-L-Val & \begin{tabular}{c} Dowex 50 W X8 cation \\ exchanger, NH\({}_{3}\) elu. \\ \end{tabular} & [25] \\ \hline Odour compounds & GC-O & DB-Wax & \begin{tabular}{c} SPE (LiChrolut-EN), \\ dichloromethane elu. \\ \end{tabular} & [26] \\ \hline Odour compounds & GC-MS; O-AEDA & Unknown & LLE by dichloromethane & [27] \\ \hline Organic acids & GC-MS; FID & Heliflex AT-1, DB5-MS & SPE (C18, NH\({}_{2}\)), NH\({}_{4}\)OH elu. & [28] \\ \hline Organic acids, sugars & GC-MS; FID & Alltech AT-5 & SPE (C18), water elu. & [29] \\ \hline Pesticides & GC-MS & HP-5 & SBSE (PDMS) & [30] \\ \hline Phenolic acids & GC-MS & RTX-5 MS & SPE (Chem-Elut), n-butanol elu. & [31] \\ \hline Phenolic acids & GC-MS & RTX-5 MS & SPE (DPA), ethyl acetate elu. & [31] \\ \hline Phenolic compounds & GC-MS & Unknown & \begin{tabular}{c} SPE (C8 Isolute), ethyl \\ acetate elu. \\ \end{tabular} & [32] \\ \hline Preservatives compounds & GC-MS & HP-INNOWax & SBSE (PDMS) & [33] \\ \hline Volatile aldehydes & GC-MS & Stabilwax & \begin{tabular}{c} SPE (LiChrolut-EN), \\ dichloromethane elu. \\ \end{tabular} & [34] \\ \hline Volatile compounds & GC-MS; FID & DB-Wax & SPME (CAR/PDMS) & [11] \\ \hline Volatile compounds & GC-MS; FID & CPWax-57 CB & HSSE-TD (PDMS) & [35] \\ \hline Volatile compounds & GC-MS; FID & DB-Wax & SBSE (PDMS) & [36] \\ \hline Volatile compounds & GC-MS; FID & CPSil 5 MS & SPME (PDMS) & [37] \\ \hline Volatile compounds & GC-MS & Zebron ZB-1701 & LLE by diethyl ether & [38] \\ \hline Volatile compounds & GC-MS & Stabilwax & \begin{tabular}{c} SPE (LiChrolut-EN), \\ dichloromethane elu. \\ \end{tabular} & [10] \\ \hline Volatile compounds & GC-MS & DB-Wax & SBSE (PDMS) & [39] \\ \hline Volatile compounds & GC-MS & Stabilwax & \begin{tabular}{c} SPE (LiChrolut-EN), \\ dichloromethane elu. \\ \end{tabular} & [40] \\ \hline Volatile compounds & GC-MS & SUPELCOWAX 10 & HS-SPME (DVB/CAR/PDMS) & [41] \\ \hline Volatile compounds & GC-MS & HP Imnowax & \
\begin{tabular}{c} DHS-SPE (Charcoal, Tenax), \\ diethyl ether elu. \\ \end{tabular} & [42] \\ \hline Volatile compounds & GC-MS & DB-Wax & SPME (PDMS, DVB) & [43] \\ \hline Volatile compounds & GC-MS & Zebron ZB-1701 & LLE by ethyl acetate & [44] \\ \hline Volatile compounds & GC-TOF-MS & RTX-5 MS &
\begin{tabular}{c} [45] \\ \end{tabular} \\ \hline Volatile compounds & GC-MS & CP-Wax 52 CB & HS-SPME (CAR-PDMS) & [46] \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Table of methods used for GC analysis of balsamic vinegar samples.