Abstract
BILTZ and Steiner (Kolloid-Zeitschrift, 1910, 7, 113) have described several cases of so-called “anomalous adsorption,” for example, the adsorption of Night Blue and Victoria Blue B. by cotton and charcoal. The adsorption isotherms rise to a maximum and fall off again with increasing concentration of the dyestuff. Hatschek in his “Physics and Chemistry of Colloids,” 1922, p. 146, suggests that electrical factors may complicate adsorption “though these do not very readily account for the maximum.” During a study of the dyeing of wool by Night Blue I have obtained adsorption curves of the same peaked form, using the same colorimetric method of estimation as Biltz and Steiner. On examining the dyed wool, however, it could not be said that the colour was any lighter in the case of the more concentrated solutions, and some defect was therefore sought in the method of experiment.
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SPEAKMAN, J. Anomalous Adsorption. Nature 114, 352 (1924). https://doi.org/10.1038/114352b0
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DOI: https://doi.org/10.1038/114352b0
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