S L Gupta
Articles written in Proceedings – Section A
Volume 36 Issue 6 December 1952 pp 493-500
It is found that the differential capacity of the dropping mercury electrode is affected mainly in two ways by added surface-active substances. At about the electrocapillary zero there is a strong lowering of the capacity due to adsorption of surface-active substances. At some higher cathodic potential there is enormous increase in differential capacity leading to a maximum and is followed by a sharp fall in the capacity; the latter is due to the desorption taking place more or less sharply at the higher cathodic potentials. The theory of the phenomenon has been formulated.
Volume 39 Issue 6 June 1954 pp 282-289
Increase in frequency is found to lower the depressing effect of the adsorption films of surface active substances on the dropping mercury electrode capacity. This fact appears to be of great interest from the point of view of elucidating the factors controlling the condenser current. Increase in frequency decreases the desorption peaks which points at the existence of some slow processes controlling the passage of electric charges during the sorption and desorption cycles.
Volume 43 Issue 5 May 1956 pp 286-296
Decomposition of murexide in solutions of low pH (2–6) has been investigated spectrophotometrically. At pH<6, the characteristic absorption of of murexide at λ=530 mμ decreased irreversibly with time, following first order law; the corresponding rate constant
Volume 44 Issue 1 July 1956 pp 46-52
The decomposition of murexide in acidic solutions was studied spectro-photometrically employing different strong acids like HC1, HBr and HNO3 and mixtures of these acids and neutral salts like KCl, KBr, KI and KNO3. The velocity constant k appeared to be a linear function of the concentration C of the strong acid used, and obeyed a relationship:
Volume 47 Issue 4 April 1958 pp 254-262