Summary
The iodic acid‐ammonium‐carbonate‐nickel salt reaction has been adapted for the routine spectrophotometric determination of morphine; the method is sensitive down to about 0·005 per cent, of morphine in solution and 0·03 per cent, of morphine can be determined with an accuracy within ± 2 per cent.
Of the bases occurring with morphine in nature only pseudo‐morphine interfered weakly and the method has been used for the rapid determination of morphine in opium and poppy capsule.
The factors affecting the formation of the green complex are briefly discussed.
Tests are described showing the differences between amorphous aloin and that of the B.P. 1953. One of these tests might, with advantage, be incorporated in official publications to differentiate crystalline aloin from the relatively impure and less active amorphous aloin.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.