Study of metal—fulvic acid interactions by capillary electrophoresis

Analysis of synthetic humic substances for medical and environmental applications by capillary zone electrophoresis

“…Regardless of the apparent match between humic substances analytes and capillary electrophoresis technology, only few researchers have tried to apply any techniques of capillary electrophoresis to the study of humic substances [4][5][6][7][8][9][10], coal extracts [11] or lignin related compounds [12,13]. Capillary electrophoresis techniques for the study of the interaction of humic substances with pollutants are only in their infancy [14][15][16][17][18]. In addition, our first work in this area [7] indicated that borate buffers interact with humic acids, drastically changing the electropherograms while only slightly altering the pH.…”

Characterization of humic substances using capillary electrophoresis with photodiode array and laser‐induced fluorescence detection

“…In a previous study [8], we reported initial results on the electrophoretic behavior of FA in the absence and presence of Fe(II1) and Hg(I1) metal ions using on-line UV detection. In this study, the electrophoretic behavior of FA and HA in the absence and presence of Al(III), using a borate buffer containing 10°/o 2-propanol and 5 M urea, and on-line LIF detection was studied.…”

Elemental speciation analysis in capillary electrophoresis

“…When choosing a UVactive co-ion, a close mobility match to the analyte ions is required; otherwise, asymmetrical peak shapes may be generated. Several cationic and anionic co-ions such as imidazole [51,52] and chromate [53][54][55] have been used in the indirect UV detection of element speciation. The main disadvantages of UV-detection method is lack of adequate sensitivity, usually with the detection limits of only 10 25 210 26 M limited by the short path length (2-100 mm) through the column.…”