CHROMATOGRAPHIC SEPARATION AND QUANTITATIVE ANALYSIS OF IONIC SPECIES

摘要

CHROMATOGRAPHIC SEPARATION AND QUANTITATIVE ANALYSISOF IONIC SPECIESAbstract of the DisclosureMethod and apparatus for chromatographic separation andquantitative analysis of ions of like charges in a sample,e.g., cations or anions. For the analysis of inorganicanions, the sample and an eluent are directed to a hydro-phobic chromatographic separation bed without permanentlyattached ion exchange sites. The eluent (a polar mobileliquid) includes an organic cation which reversibly adsorbsto the bed to create ion exchange sites which differen-tially retard the anions for chromatographic resolution.The eluent also includes a developing reagent of the samecharge as the ion to be analyzed. The eluent including theresolved anions is then passed through an ion exchangeresin which precludes passage of the counter ion and itsco-ion in ionized form and then through a conductivity cellfor quantitative detection. Inorganic cations may bedetected in an analogous manner. The system may also beemployed to analyze highly organic cations or anions( e.g.,surfactants). In this instance, the organic ion of interestis already strongly attracted to the hydrophobic separationbed, and so the counter ion may be inorganic.