title: Semiautomated analysis of ergonovine maleate or methylergonovine maleate tablets and injections by colorimetric or fluorometric systems.
abstract: Two semiautomated analytical systems have been developed to determine ergonovine and methylergonovine maleate in single tablets and injections. The active ingredient is dissolved in a tartrate buffer. In the fluorometric method the stream is automatically diluted with tartrate buffer and excited with ultraviolet light; the resulting fluorescence is measured and recorded. In the colorimetric method, the stream is automatically made basic with sodium hydroxide and extracted with n-butanol. The extract is mixed with p-dimethylaminobenzaldehyde reagent. After reaction, the solution is mixed with sodium nitrite solution, and the developed color is measured at 550 nm. Recoveries of 100% were obtained from spiked placebos. Standard deviations for powdered tablet and injection samples ranged from 0.63 to 1.24%. Comparisons with the USP XVIII methods are presented.
mesh_terms: D001322:Autoanalysis; D003124:Colorimetry; D004304:Dosage Forms; D004874:Ergonovine / Q000031:analogs & derivatives* / Q000032:analysis*; D006863:Hydrogen-Ion Concentration; D007202:Indicators and Reagents; D012996:Solutions / Q000032:analysis; D013050:Spectrometry, Fluorescence; D013607:Tablets
chemical_list: D004304:Dosage Forms; D007202:Indicators and Reagents; D012996:Solutions; D013607:Tablets; D004874:Ergonovine