(2003; 148 pages)
14.37 Whenever official reference standards exist, these should preferably be used.
14.38 Official reference standards should be used only for the purpose described in the appropriate monograph.
14.39 Reference standards prepared by the producer should be tested, released and stored in the same way as official standards. They should be kept under the responsibility of a designated person in a secure area.
14.40 Secondary or working standards may be established by the application of appropriate tests and checks at regular intervals to ensure standardization.
14.41 Reference standards should be properly labelled with at least the following information:
(a) name of the material;
(b) batch or lot number and control number;
(c) date of preparation;
(f) storage conditions.
14.42 All in-house reference standards should be standardized against an official reference standard, when available, initially and at regular intervals thereafter.
14.43 All reference standards should be stored and used in a manner that will not adversely affect their quality.