Residual titration methods

In usual practice, the volumetric titrations may be accomplished either by direct titration method e.g., assay of HC1 employing NaOH as the titrant, or by residual titration method e.g., assay of ZnO in which case a known-excess-measured volume of standardised solution of H2S04, more than the actual amount chemically equivalent to ZnO, is added to the sample thereupon, the H2S04 which remain unreacted with ZnO is subsequently titrated (sometimes referred to as back titration or residual titration in the text) employing standardized NaOH solution. 

The two methods, namely direct titration method and residual titration method are briefly discussed as under ... 

A few typical examples of acidimetric titrations, employing direct titration method (DTM) and residual titration method (RTM) from the Pharmacopoeia of India are described here ... 

Residual titration method is an alternative means of assay of drugs by Aqueous Titrations . Justify the statement with the help of assay of the following pharmaceutical substances ... 

The residual titration method for pharmaceutical substances using potassium permanganate solution are mainly of two categories, namely ... 

Residual Titration Method (Excess of Iodine Titrated with Sodium Thiosulphate)... 

A few other pharmaceutical substances may also be assayed by adopting the residual titration method as shown in Table 7.2. 

Masking and demasking agents, and (iii) Residual titration methods. 

How does residual titration method help in the complexometric btrations Elaborate the assay of the following drugs by this technique ... 

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