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The 2nd China -Japan -Korea Joint Symposium on Ion Chromatography Abstract of Presentation We welcome your submission of an abstract for poster consideration. You are encouraged to submit abstracts electronically through the each regional chairperson by e-mail, do not include graphics or figures. If sending as an attached file, send in IBM Word Format and cut-and-paste the abstract into the e-mail. Indicate lecture or poster preference. Abstract format: title, authors (underline presenting author), addresses of authors, approx. 200 words abstract. To write the abstract, please refer to example 1 and example 2. [Example 1] Ion-exclusion Chromatography of Some Carboxylic Acids Using Atmospheric Pressure Chemical Ionization Mass Spectrometry M.I. H.Helaleh, H. Taoda, K. Tanaka, National Institute of Advanced Industrial Science and Technology, Seto, Japan; W. Hu and K. Hasebe, Hokkaido University, Sapporo, Japan; P.R.Haddad, University of Tasmania, Hobart, Australia Carboxylic acids were separated on a polymathacrylate-based weakly acidic cation-exchange resin (TSKgel OApak-A) using ion-exclusion chromatography. A mixture of formic, acetic, propionic, valeric, iso-valeric, iso-butyric, and iso-caproic acids has been separated based on the ion-exclusion/adsorption mechanism. A combination of ion-exclusion chromatography with uv-photodiode array, conductivity and APCI-MS detection was used. A mobile phase consisting of 0.5mM H2SO4 /10% methanol (pH=ca 3.0) was used to separate and detect the mixture of the carboxylic acids. The carboxylic acids were separated and identified, using (APCI) interface in the negative ionization mode. Methanol with nitrogen sheath gas yield the best result. Addition of methanol to the eluent reduced the retention times of the carboxylic acid with hydrophobic nature. Selective ion monitoring (SIM) acquisition mode was used for the LC-MS. The method was applied to the analysis of carboxylic acids in real samples. Contact to: Murad I.H.Helaleh National Institute of Advanced Industrial Science and Technology 110, Nishiibara-cho, Seto-shi, Aichi, 489-0884 Japan Phone: +81-561-82-2141 Fax: +81-561-82-2946 Email: Murad.helaleh@lycos.com |
1st JCK Joint Symposium on Ion chromatography
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