Comparison of metal pre-concentration on immobilized Kelex-100 and quadruple inductively coupled plasma mass spectrometric detection with direct double focusing inductively coupled plasma mass spectrometric measurements for ultratrace multi-element determinations in sea-water

1. Ferrarello, C.N.
2. Montes Bayón, M.
3. García Alonso, J.I.
4. Sanz-Medel, A.