<p>The goal of the present investigation was to develop a simple, accurate, precise, robust, and cost-effective UV-spectroscopic technique for the quantitative estimation of xanthohumol in bulk and hydrogel, in accordance with the International Conference on Harmonisation guidelines. The λ<sub>max</sub> of xanthohumol was found to be 363 nm with <i>y</i> = 0.06363<i>x</i> + 0.0115 as the regression equation, a 0.9968 regression coefficient, and showed linearity in the range 2–14 μg/mL. Relative standard deviation (%RSD) values for intraday analysis were 1.105, 0.936, and 0.32, whereas for interday analysis, these values were 1.312, 0.433, and 0.979 (&lt;2% RSD). RSD for absorbance values analyzed using different spectrophotometers was 0.886 and 1.242%, and by different analysts it was 0.647 and 1.044% (&lt;2% RSD), which validated the ruggedness parameter. RSDs for absorbance values analyzed at 361, 363, and 365 nm were 0.761, 1.045, and 0.885%, respectively (RSD &lt; 2%), indicating robustness. The mean recovery of xanthohumol in the presence of carbopol-934 was in the range 98–102%, which validated its specificity. The limit of detection (LOD), limit of quantitation (LOQ), and Sandell’s index for xanthohumol were 0.639, 1.939 μg/mL, and 0.017278 μg/cm<sup>2</sup> per 0.001 absorbance unit respectively, indicating higher sensitivity of the analytical method for xanthohumol detection. Xanthohumol-loaded carbopol-934 hydrogel was formulated by dispersing xanthohumol in carbopol-934 and neutralizing it with triethanolamine. The solubility of the bulk form of xanthohumol in phosphate buffer at pH 6.8 was 1.153 μg/mL, which was enhanced to 4.12 μg/mL by the production of xanthohumol-loaded Carbopol hydrogel.</p>

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Development and Validation of an Ultraviolet Spectroscopic Technique for Determination of Solubility of Xanthohumol in Bulk and in Formulation

  • Nikita Kaushik,
  • Neelam Sharma

摘要

The goal of the present investigation was to develop a simple, accurate, precise, robust, and cost-effective UV-spectroscopic technique for the quantitative estimation of xanthohumol in bulk and hydrogel, in accordance with the International Conference on Harmonisation guidelines. The λmax of xanthohumol was found to be 363 nm with y = 0.06363x + 0.0115 as the regression equation, a 0.9968 regression coefficient, and showed linearity in the range 2–14 μg/mL. Relative standard deviation (%RSD) values for intraday analysis were 1.105, 0.936, and 0.32, whereas for interday analysis, these values were 1.312, 0.433, and 0.979 (<2% RSD). RSD for absorbance values analyzed using different spectrophotometers was 0.886 and 1.242%, and by different analysts it was 0.647 and 1.044% (<2% RSD), which validated the ruggedness parameter. RSDs for absorbance values analyzed at 361, 363, and 365 nm were 0.761, 1.045, and 0.885%, respectively (RSD < 2%), indicating robustness. The mean recovery of xanthohumol in the presence of carbopol-934 was in the range 98–102%, which validated its specificity. The limit of detection (LOD), limit of quantitation (LOQ), and Sandell’s index for xanthohumol were 0.639, 1.939 μg/mL, and 0.017278 μg/cm2 per 0.001 absorbance unit respectively, indicating higher sensitivity of the analytical method for xanthohumol detection. Xanthohumol-loaded carbopol-934 hydrogel was formulated by dispersing xanthohumol in carbopol-934 and neutralizing it with triethanolamine. The solubility of the bulk form of xanthohumol in phosphate buffer at pH 6.8 was 1.153 μg/mL, which was enhanced to 4.12 μg/mL by the production of xanthohumol-loaded Carbopol hydrogel.