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  • 1 RMD Research and Development Center Waghaldhara Valsad 396375 India
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Piperine and gallic acid are of different chemical natures — piperine is an alkaloid, while gallic acid a phenolic compound. They are used as marker compounds in many plant-based formulations. A highperformance thin-layer chromatographic (HPTLC)-densitometric method has been developed and validated for the simultaneous quantification of piperine and gallic acid as such and in pharmaceutical dosage forms. Toluene-ethyl acetate (3:7) was used as mobile phase and scanning was done at 254 and 340 nm. The method was validated with respect to linearity, reproducibility, specificity, accuracy, precision, robustness, and ruggedness. Both compounds showed good linearities in the range of 250–1750 ng. LOD and LOQ for piperine were 9.98 and 33.29 ng, while for gallic acid 25 and 83.33 ng. Average % RSD values of precision for piperine and gallic acid were 0.46% and 0.72%, respectively. % Recovery was 96–103%. The method is accurate, reproducible, cost-effective, and can be used in routine analysis.

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