caa a22 4500 463219341 CHVBK 20180405153207.0 cr unu---uuuuu 170326e20071201xx s 000 0 eng 10.1134/S1061934807120040 doi (NATIONALLICENCE)springer-10.1134/S1061934807120040 Separation of the positional isomers of phthalic acids in hydroorganic solvents using capillary electrophoresis [Elektronische Daten] [J. Threeprom, W. Som-Aum, J. Lin] The positional isomers of phthalic acids (ortho-, meta-, and para-) and benzoic acid could be completely separated by capillary electrophoresis (CE). A simple CE method employing direct detection in mixed methanol/water buffers is presented. The effect of the electrolyte buffer system, including pH, buffer concentration, and organic solvent on the electrophoretic mobility of the analytes, is investigated. The electroosmotic flow is reversed using cationic surfactant and cetyltrimethylammonium bromide so that anions are separated under the co-EOF mode. The resolution of the analytes and selectivity could be improved by the adjustment of the methanol content. Ion association with the surfactant in methanol/water buffer is discussed. The validity of the method in terms of sensitivity, reproducibility, and linearity is also reported. Pleiades Publishing, Ltd., 2007 Threeprom J. Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology, Ministry of Education, Department of Chemistry, Tsinghua University, 100084, Beijing, China aut Som-Aum W. Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology, Ministry of Education, Department of Chemistry, Tsinghua University, 100084, Beijing, China aut Lin J. Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology, Ministry of Education, Department of Chemistry, Tsinghua University, 100084, Beijing, China aut Journal of Analytical Chemistry Nauka/Interperiodica 62/12(2007-12-01), 1126-1130 1061-9348 62:12<1126 2007 62 10809 https://doi.org/10.1134/S1061934807120040 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1061934807120040 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Threeprom J. Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology, Ministry of Education, Department of Chemistry, Tsinghua University, 100084, Beijing, China aut NATIONALLICENCE 700 1- Som-Aum W. Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology, Ministry of Education, Department of Chemistry, Tsinghua University, 100084, Beijing, China aut NATIONALLICENCE 700 1- Lin J. Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology, Ministry of Education, Department of Chemistry, Tsinghua University, 100084, Beijing, China aut NATIONALLICENCE 773 0- Journal of Analytical Chemistry Nauka/Interperiodica 62/12(2007-12-01), 1126-1130 1061-9348 62:12<1126 2007 62 10809 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer