Number | Date | Country | Kind |
---|---|---|---|
8333830 | Dec 1983 | GBX |
Number | Name | Date | Kind |
---|---|---|---|
3628952 | Puschel et al. | Dec 1971 | |
3736136 | Danhauser et al. | May 1973 | |
3953211 | Imai et al. | Apr 1976 |
Entry |
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"Preconcentration of Trace Metal Ions by Combined Complexation-Anion Exchange Part I, Cobalt, Zinc and Cadmium with 2-(3'-Sulfobenzoyl)-Pyridine-2-Pyridylhydrazone", Anal. Chem. Acta, 81, (1976), pp. 349-360 by Going, Wesenberg and Andrejat. |