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The application of direct zero-order UV spectrophotometric and graphical or derivative background correction methods to selected pharmaceutical preparations shows their relative advantages in different situations. The assay of the active components in a changeable matrix is a problem with formulations having a limited shelflife. Although the standard(More)
The results of an extended study on the feasibility and scope of derivative high-performance thin-layer chromatography (HPTLC) for the assay of unresolved components are presented. It is shown that as the resolution decreases the accuracy of quantitative digital electronic integration, area and peak height measurements diminish to a point where the(More)
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