Abstract
The separation of the five principal alkaloids (morphine, codeine, thebaine, noscapine, and papaverine), three minor alkaloids (laudanosine, cryptonine and narceine), meconic acid and some unidentified constituents in gum opium samples has been achieved on a reversed-phase phenyl column by gradient high-performance liquid chromatography using a simple and inexpensive mobile phase system. The linear gradient programme was started at 5% and ended at 70% methanol in triethylammonium phosphate buffer in 20 min. The five principal alkaloids were also determined with good precision. The method requires minimum sample preparation and is suitable for routine analysis.
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