Retention selectivity between 4-(2-pyridylazo)resorcinol and its cobalt chelate in the solid phase extraction systems and its application to the on-line preconcentration for reversed phase HPLC

Akira Tsuyoshi, Hitoshi Hoshino, Takao Yotsuyanagi

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Preferential solid phase extraction of ultratrace metal chelate from the excess of its ligand has been succeeded in the case of cobalt, 4-(2-pyridylazo)resorcinol (PAR), ODS-Silica, and H2O system, applying the reverse order of them found in reversed-phase HPLC with aqueous methanol and ODS-SiO2. This finding makes it possible to concentrate the 1-ppt level of cobalt chelate in the presence of excess PAR from aqueous samples using kinetically selective HPLC.

Original languageEnglish
Pages (from-to)302-303
Number of pages2
JournalChemistry Letters
Issue number4
DOIs
Publication statusPublished - 2001 Jan 1

ASJC Scopus subject areas

  • Chemistry(all)

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