Abstract
The condition of lead chromate in gelatin and agar agar medium has been studied. In presence of agar agar medium the colloid formed is stabilised by lead ions and coagulated by the excess of chromate ions. Lead chromate forms a very stable colloid in the presence of gelatin sol which could not be precipitated by excess of lead ions or chromate ions. Due to the formation of a very stable colloid in gelatin medium, well defined rings of lead chromate are not obtained in gelatin gel.
Zusammenfassung
Der Zustand von Bleichromat und Gelatine in Agar-Agar zeigt, da\ letzteres Medium das gebildete Kolloid durch Bleiionen stabilisiert und durch überschu\ an Chromationen koaguliert. Bleichromat bildet ein sehr stabiles Kolloid in Gegenwart von Gelatinesol, das nicht durch überschu\ an Bleiionen oder Chromationen ausgefÄllt werden kann. Deshalb sind wohldefinierteLiesegang-Ringe in Bleichromat in Gelatinegel nicht zu erhalten.
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References
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Kant, K. Condition of lead iodide in the medium of lyophilic sols. Kolloid-Z.u.Z.Polymere 191, 143–145 (1963). https://doi.org/10.1007/BF01499540
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DOI: https://doi.org/10.1007/BF01499540