K S R Krishnaiah
Articles written in Proceedings – Section A
Volume 64 Issue 2 August 1966 pp 84-90
Some systematic studies have been carried out on the influence of temperature on the photometric determination of silicon by the molybdenum blue procedure. It has been shown that temperature exerts a distinct influence on the colour intensities involved in the different procedures and the extent of this influence depends largely on the nature of the acid medium and the reducing agent employed. Ascorbic acid has been successfully employed to overcome the influence of temperature.
Our thanks are due to the management of the Tata Iron and Steel Company for permitting the publication of this paper.
Volume 67 Issue 4 April 1968 pp 222-230
The viscosity, depression in freezing point, potentiometric and conductometric experiments on the reaction of tartaric acid with sodium tungstate and sodium molybdate indicated the formation of the complex at 1:1 ratio of tungstate or molybdate to tartaric acid. The complex compounds have been isolated. The silver, mercurous, copper, cadmium, zinc, mercuric, barium, strontium, lead, cobalt and nickel salts of tungstotartrate and molybdo-tartrate have been prepared from the sodium salt and their composition studied.
Volume 70 Issue 1 July 1969 pp 42-46
A distinct influence of temperature has been indicated on the colour intensities of the reduced silicomolybdate solution confronted in the estimation of silicon in ferrous materials by the BISRA Methods of Analysis Committee procedure. This influence has been successfully overcome by employing ascorbic acid as a reducing agent in place of stannous chloride and hence the former reagent commends itself for adoption in the above procedure.