Terminology

Volumetric solutions are prepared according to the usual chemical analytical methods. The accuracy of the apparatus used is verified to ensure that it is appropriate for the intended use.

The concentration of volumetric solutions is indicated in terms of molarity (m ). The molarity of a solution is the number of moles of substance contained in 1000 mL of the solution. A solution that contains x moles of substance per litre is said to be xm .

Volumetric solutions do not differ from the prescribed strength by more than 10%. The molarity of the volumetric solutions is determined by an appropriate number of titrations. The repeatability does not exceed 0.2% (relative standard deviation).

British Pharmacopoeia monographs In assays and other quantitative tests, solutions to be standardised before use; include the letters VS after the name of the reagent.