Kumar, S. (Eds.)'s Analytical techniques for natural product research PDF

By Kumar, S. (Eds.)

This ebook includes eight chapters targeting new mechanisms to urge and keep watch over the standard keep watch over of plant-based medicinal drugs. the significance of those recommendations within the standardization of multi-component, plant-based formulations can be mentioned. on hand In Print

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1996). , 1994; Taylor, 1996). 30 Chapter 2 Fig. 4. Supercritical extraction facility at ICAR-Directorate of Medicinal and Aromatic Plants Research, Anand, India. Three forms of collecting extracts from SFE extracts have been reported: (i) collection using a solid matrix; (ii) liquid collection using a small volume of solvent; and (iii) sublimation of carbon dioxide directly into a vessel. In solid collection, CO2 and the extract are depressurized before collection, thereby enabling the adsorption of analytes on collection adsorbant or packing material.

87% of Rb1 obtained in 70% water–ethanol). Similarly, in the case of the taxane class of natural products from the needles of Taxus, MASE reduced both extraction time and solvent consumption considerably while maintaining the qualitative and quantitative recovery of taxane relative to SLE methods. Casazza et al. (2010) compared SLE, UASE and MASE for the extraction and antioxidant power of phenolics from Vitis vinifera wastes. Although the highest content of total polyphenol, o-diphenols and flavonoids for seeds and skins were obtained using high pressure and temperature ­extraction, the highest antiradical power was determined in seed extracts obtained using MASE.

2002). , 2002). The addition of a large amount of modifier will change the critical parameters of the mixture (Pourmortazavi and Hajimirsadeghi, 2007). The addition of ethanol increased the bulk density of SC-CO2 due to the higher density of the co-solvent and clustering of SC-CO2 molecules around the co-solvent (Guclu-Ustundag and Temelli, 2005). , 2001). It was found that ethanol as a modifier increased the solubility by one order of magnitude and the increase in solubility was proportional to the square root of the modifier concentration.

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