were analysed by ion chromatography (Metrohm 850 system) using injection valve along with the Pixel Array Detector (PAD) anion exchange column (1–150 Metrosep-Carb) and isocratic highpressure pump for the channel PAD 818 IC. Operating conditions reported by Moraga, Martํnez-Navarrete, and Chiralt (2006) for performance liquid chromatography were used, with minor modifications (mobile phase NaOH 80 mM, at 0.9 mL/min flow rate).