5-Iodoquinoline-7-sulfonic acid

NACE with indirect detection has been applied to the determination of fatty acids (FAs) and ascorbic acid (AA), respectively. C2-C18 FAs have been separated in less than 12 min using 8-hydroxy-7-iodoquinoline sulfonic acid as chromophores in NACE with indirect absorbance. The dissociation constant (p/linear plot -log[(mu 0/mu) - 1] versus pH, using 20% isopropanol and 40% ACN as the organic modifier in NACE, are all above about two units than those obtained in aqueous solution. NACE with indirect laser-induced fluorescence, using merocyanine 540 MC540) asfluorophores, has been performed for the analysis of AA and its stereoisomer, isoascorbic acid (lAA), and the limits of detection of AA and lAA are 0.30 and 0.17 pM, respectively. This method has been applied to the determination of AA in a lemon juice spiked with lAAasthe internal standard in less than three minutes, and its concentration is 76.7 + 0.4 mM. 

Mixture of 80% of 8-hydroxy-7-iodoquinoline-5-sulfonic acid and 20% sodium bicarbonate chiniofon quiniofon ... 

---