| Abstract | 8-Quinolinol, immobilized on cross-linked polyvinyl pyrrolidone, a macroreticular styrene—divinylbenzene (XE-305) or methylated polystyrene (Merrifield resin) substrates, was used for the preconcentration of ions of Cd, Zn, Pb, Cu, Fe, Mn, Ni, Co, and Cr from sea water prior to their measurement by electrothermal atomic absorption spectrometry. Optimal results were obtained when the XE-305 substrate was used. Except for chromium, recoveries of the above elements from sea water with this material averaged 100% (range 88–109%) with absolute blanks ranging between 0.1 ng (Cd) and 7 ng (Zn). Performance is demonstrated by quantitation of metal ions in open ocean water. |
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