6.50.20. Solutions
Unless otherwise specified, all solutions shall be prepared with Purified Water. Solutions for quantitative measures shall be prepared using accurately weighed or accurately measured analytes (see section 8.20, About).
An expression such as “(1 in 10)” means that 1 part by volume of a liquid shall be diluted with USP37 a sufficient quantity of the diluent or solvent to make the volume of the finished solution 10 parts by volume. An expression such as “(20:5:2)” means that the respective numbers of parts, by volume, of the designated liquids shall be mixed, unless otherwise indicated.