Research Article

Analysis of Reaction between -Lipoic Acid and 2-Chloro-1-methylquinolinium Tetrafluoroborate Used as a Precolumn Derivatization Technique in Chromatographic Determination of -Lipoic Acid

Figure 3

Spectra of lipoic acid (LA), dihydrolipoic acid (DHLA), 2-chloro-1-methylquinolinium tetrafluoroborate (CMQT), and derivatization product (DHLA-CMQT) (concentration of all reagents and compounds = 10−5 mol L−1; all spectra with exception of derivatization product were recorded against bidistilled water as a blank; spectrum of derivatisation product were recorded against mixture of reagents without DHLA).