Scope of differential UV and differential fluorescence assays for phenothiazines: comparison with official methods.

Operational difficulties have been encountered with many of the official phenothiazine assay procedures in this laboratory. Although some difficulties were corrected, the procedures still lack specificity. Accordingly, the general scope of differential UV and differential fluorescence methods was investigated. These specific methods are facile, reproducible, and applicable to both composite and single-tablet assays.

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