Ion chromatographic separation of hydrogen ion and other common mono- and divalent cations.

نویسندگان

  • Qun Xu
  • Masanobu Mori
  • Kazuhiko Tanaka
  • Wenzhi Hu
  • Paul R Haddad
چکیده

We introduced an approach to the ion chromatographic determination of common mono- and divalent cations including hydrogen ion and demonstrated the ability of a C30 column dynamically coated first with dodecylsulfate and then with 18-crown-6 ether to separate the cations by ion-exchange mechanism. Using an ethylenediamine solution containing a small concentration of 18-crown-6 ether and lithium dodecylsulfate at pH 6.2 as eluent, the cations were eluted in the order Li < Na+ < NH4+ < H+ < K+ < Mg2+ < Ca2+ with symmetrical peaks. The conductivity vs. concentration plots were linear about three orders of magnitude, from millimolar to micromolar; and the detection limits were all < 0.6 microM. Rainwater was analyzed directly using this ion chromatographic system with satisfactory results.

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عنوان ژورنال:
  • Journal of chromatography. A

دوره 1023 2  شماره 

صفحات  -

تاریخ انتشار 2004