## 1 Introduction
\begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Analyt/Target** & **Method** & **Column** & **Extraction Procedure** & **Reference** \\ \hline Amines & HPLC-FLD & Luna C18 & SPE (Oasis MCX 1), NaOH/MeOH elu. & [47] \\ \hline Amino acids & HPLC-DAD & Zorbax Eclipse AAA & [15] \\ \hline Amino acids & HILIC-MS/MS & TSKgel Amide-80 & [48] \\ \hline Amino acids and amines & HPLC-DAD & Nova-Pak® C18 & [14] \\ \hline Ascorbic acid & HPLC-MWD & Zorbax Eclipse plus C18 & [15] \\ \hline Dicarbonyl compounds & HPLC-DAD & Gemini C18 & SPE (UC-18 Sep-Pak), MeOH/water elu. & [49] \\ \hline Dicarbonyl compounds & HPLC-DAD; MS/MS & Zorbax Eclipse XDB-C18 & SPE (UC-18 Sep-Pak), water elu. & [50] \\ \hline Furanic compounds & IEC-DAD & Bio-Rad Aminex HPX 87H & [16] \\ \hline Furanic compounds & HPLC-DAD & Bio-Rad Aminex HPX 87H & [13] \\ \hline Furanic compounds & IEC-DAD & Bio-Rad Aminex HPX 87H & [51] \\ \hline Furanic compounds & HPLC-DAD & SUGAR SH 1011 & [52] \\ \hline Furanic compounds and & HPLC-DAD & XBridge C18 & [53] \\ \hline HMF & HPLC-DAD & Hypersil ODS C18 & [54] \\ \hline HMF, MTCA & HPLC-MS/MS & Thermo Biobasic-C18 & SPE (ODS C18), MeOH/water elu. & [55] \\ \hline Imidazoles & HPLC-MS/MS & Luna C18 & [56] \\ \hline Molecular weight and distribution & SEC-RI; UV/Vis & TSK-gol GMP(XL) and & [57] \\  & & G3000 PW(XL) & & \\ \hline Molecular weight and distribution & SEC-RI & TSK-gol GMP(XL) and & [58] \\ \hline Ochratoxin A & HPLC-FLD & C-18 Lichrosphere 100 & LLE by chloroform & [59] \\ \hline Organic acids & HPLC-UV/Vis & Hypersil ODS C18 & [60] \\ \hline Organic acids & IEC-DAD; UV/Vis & Aminex HPX87-H & [61] \\ \hline Organic acids & HPLC-DAD & Prevail organic acid column & [15] \\ \hline Organic acids, phenolic compounds & HPLC-DAD & Agilent TC-C18, Zorbax & [62] \\ \hline Organic acids, sugars & HPLC-RI; UV/Vis & Bio-Rad Aminex HPX 87H & [13] \\ \hline Phenolic compounds & HPLC-DAD & Luna C18 & [63] \\ \hline Phenolic compounds & HPLC-DAD & LiChroCART 250-4 & [64] \\  & & Superspher 100 RP-18 & \\ \hline Phenolic compounds & HPLC-MS/MS & Waters C18 & Online SPE (HyperSepTM Retain PEP) & [65] \\ \hline Phenolic compounds & HPLC-MS/MS & \
\begin{tabular}{c} Synergy Fusion RP18 \\ column \\ \end{tabular} & SPE (Strata C18-E), MetOH elu. & [48] \\ \hline Phenolic compounds, & & & \\ HMF & HPLC-DAD & Zorbax Eclipse plus C18 & [15] \\ \hline Sugars & HPLC-RI & Carbohydrate HP column & [15] \\ \hline Sugars and derivates & HPLC-RI & Agilent HI-plex H & [12] \\ \hline Sugars and furfurals & HPLC-RI; DAD & Bio-Rad Aminex HPX 87H & [66] \\ \hline Sugars and furfurals & HPLC-RI; DAD & Bio-Rad Aminex HPX 87H & SPE (C18), MeOH/water elu. & [67] \\ \hline Taxifolin & HPLC-MS/MS & Zorbax SB-C18 & [64] \\ \hline \(\beta\)-carboline alkaloids & HPLC-DAD; MS/MS &
\begin{tabular}{c} Eurospher 100 C18, \\ Symmetry C18 \\ \end{tabular} & LLE by ethyl acetate & [68] \\ \hline \multicolumn{4}{c}{Abbreviations: HMF—hydroxymethylfurral, MTCA—1-methyl-1,2,3,4-tetrahydro-\(\beta\)-carboline-3-carboxylic acid, FLD—fluorescence detector, DAD—diode-array detector, HILIC—hydrophilic interaction chromatography, MS/MS—tandem mass spectrometry, MWD—multiple wavelength detector, IEC—ion-exclusion chromatography, SEC—size-exclusion chromatography, RI—refractive index detector, UV/Vis—ultraviolet/visible light detector, SPE—solid phase extraction, elu.—elution, LLE—liquid-liquid extraction.} \\ \end{tabular}
\end{table} 
Table 2: Table of methods used for HPLC analysis of balsamic vinegar samples.