Summary
Omega Chrome Fast Blue 2G was used as an indicator for the direct titration of calcium, magnesium, manganese and nickel. A displacement reaction was described for the titration of lead and cadmium. Fenugreek mucilage which is a colourless polysaccharide was used as medium for spot tests. The method is illustrated by spot tests for Ca, Mg, Mn, Ni, and Co. It has the advantage of sensitivity and simplicity.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Barnard jr., A. J., W. C. Broad and H. Flaschka: Chemist-Analyst 45, 86, 111 (1956); 46, 18, 46, 76 (1957); cf. Z. analyt. Chem. 160, 143 (1958); 164, 427 (1958).
Belcher, R., R. A. Close and T. S. West: Chemist.-Analyst 46, 86 (1957); 47, 2 (1958); cf. Z. analyt. Chem. 164, 427 (1958); 166, 45 (1959).
Daoud, K. M.: Biochemic. J. 26, 255 (1932).
Flaschka, H.: Mikrochim. Acta (Wien) 39, 38 (1952); cf. Z. analyt. Chem. 137, 453 (1952/53).
Schwarzenbach, G.: Complexometric Titrations, p. 105. London: Methuen and Co. Ltd. 1957.
Society of Dyers and Colourists: Colour Index, Vol. I, 1956, p. 1521 and Vol. III p. 3096.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Abd El Raheem, A.A. Omega Chrome Fast Blue 2G: A new metal indicator for EDTA titrations. Z. Anal. Chem. 167, 98–104 (1959). https://doi.org/10.1007/BF00460411
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00460411