Summary
The acid base properties of solochrome violet R.S. has been studied with the object of testing its use as an acid base indicator or as a colorimetric reagent. The pk values of 4.35, 7.4, and 9.45 corresponding to the three steps of ionisation of the free acid were evaluated by the aid of the relation between log (acid)/(salt) and ph values obtained during the course of the potentiometric titration of the free acid with a free base. The dye has proved to be a suitable indicator in titrating some mineral and organic acids as well as a colorimetric reagent for the microdetermination of vanadium.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Amin, A. M., H. Khalifa and A. S. Moustafa: Z. analyt. Chem. 173, 138 (1960).
Hückel, W.: Theoretical Principles of Organic Chemistry, Volume II, Elsevier Publishing Co., Amsterdam, London, New York, Princeton (1958), p. 342, 343.
Khalifa, H.: Anal. chim. Acta (Amsterdam) 17, 318 (1957); cf. Z. analyt. Chem. 162, 56 (1958).
Khalifa, H.: Z. analyt. Chem. 158, 103 (1957).
Khalifa, H., A. M. Amin and F. A. Osman: Z. analyt. Chem. 172, 167 (1960).
Khalifa, H., and A. Farag: Anal. chim. Acta (Amsterdam) 17, 423 (1957); cf. Z. analyt. Chem. 162, 127 (1959).
Khalifa, H., and A. Farag: Z. analyt. Chem. 158, 109 (1957).
Khalifa, H., and M. R. Zaki: Z. analyt. Chem. 158, 1 (1957).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Khalifa, H., Bishara, S.W. The acid-base properties of solochrome violet R. S.. Z. Anal. Chem. 178, 184–193 (1960). https://doi.org/10.1007/BF00488954
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00488954