Coloring liquids
The investigation of the coloration of liquids is a test method in pharmacy to characterize the color strength of a liquid in the range of the colors brown, yellow and red. In some monographs of the European Pharmacopoeia, this test is an analytical release criterion for medicinal substances .
Colorless therefore means that the liquid examined has the appearance of water or the solvent or is not colored more strongly than a precisely defined color comparison solution .
The preparation of the color comparison solutions and the implementation of the test are described in the European Pharmacopoeia.
Individual evidence
- ↑ a b c European Pharmacopoeia . Deutscher Apotheker Verlag Stuttgart, 6th edition, 2008, pp. 29–31, ISBN 978-3-7692-3962-1 .