Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1002/jssc.200900738
Titel (primär) Retention of arsenic species on zwitterionic stationary phase in hydrophilic interaction chromatography
Autor Xie, D.; Mattusch, J.; Wennrich, R.
Journal / Serie Journal of Separation Science
Erscheinungsjahr 2010
Department ANA
Band/Volume 33
Heft 6-7
Seite von 817
Seite bis 825
Sprache englisch
Keywords Arsenic species; Hydrophilic interaction chromatography; Hydrophilic partitioning; Retention behavior; Salts
Abstract Zwitterionic hydrophilic interaction chromatography (ZIC®-HILIC) was used to study the retention of selected organoarsenicals. The retention behavior of nine organic arsenic species on ZIC®-HILIC was investigated to elucidate which is the driving force for their separation, hydrophilic partitioning or adsorption driven by hydrogen bonds with surface H-donor/acceptor groups of the stationary phase. For this, the retention factor of the compounds k was correlated with log PO/W and with the calculated strength of hydrogen bonding of the analytes. By examining aliphatic and phenylic compounds separately, improved correlation was received. This indicates that both phenomena contribute to the separation of these arsenic species on ZIC®-HILIC. The results obtained evidence that considerable electrostatic interactions also occur on ZIC®-HILIC. Retention behavior of arsenic species was investigated by varying the separation conditions, which shows that the composition of the eluent has a strong influence on the retention behavior. It is highly dependent on water/acetonitrile ratio, pH value and salt additives. Dissociation degree and polarity of arsenic species, which are varying with pH, regulate the distribution of arsenic species between stationary and mobile phases in HILIC. Increase in the ammonium acetate concentration leads to shortened or to prolonged retention depending on the structure of the arsenic species.
dauerhafte UFZ-Verlinkung
Xie, D., Mattusch, J., Wennrich, R. (2010):
Retention of arsenic species on zwitterionic stationary phase in hydrophilic interaction chromatography
J. Sep. Sci. 33 (6-7), 817 - 825