The quantitative estimations of a number of pharmaceutical substances may be carried out by using a variety of potential oxidizing agents as stated below :
(i) Permanganate Methods :
(a) Direct Titration Methods,
(b) Indirect Titration Methods, and
(c) Residual Titration Methods.
(ii) Dichromate Methods :
Direct titrations with Potassium Dichromate.
(iii) Ceric Sulphate Titration Methods :
Direct Titrations with Ceric Sulphate