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• W2833609995 abstract "An undisputed trend in sample preparation at present is to meet the requirements of green chemistry especially in the field of natural products. Green technology continuously pursues new solvents to replace common organic solvents that possess inherent toxicity. Over the past two decades, non-ionic surfactants have gained enormous attention from the scientific community. The micelle-mediated extraction and cloud-point preconcentration (CPE) methods offer a convenient alternative to the conventional extraction systems. Recently, natural deep eutectic solvents (NDESs) have emerged as green and sustainable solvents for efficient extraction of bioactive compounds or drugs. They are generally composed of neutral, acidic or basic compounds that form liquids of high viscosity when mixed in certain molar ratio. The presented work aimed to comprehensively compare and evaluate the potential and effectiveness of NDES as well as non-ionic surfactants (Genapol X-080, Triton X-100 and Triton X-114) for extraction of Amaryllidaceae alkaloids from Crinum powellii bulbs as representative example of plant material, in comparison to the conventional solvents (methanol, ethanol and water).A new validated high-performance thin-layer chromatographic (HPTLC) method has been developed for the simultaneous quantitation of three alkaloids markers, lycorine, crinine and crinamine, in the bulbs of C. powellii. Extraction efficiency of the targeted alkaloids from the bulb matrix with organic and ecofriendly (green) solvents were studied. Results revealed that NDES and surfactants were significantly more efficient in alkaloid extraction than previous methods requiring the consumption of organic solvents and water. Genapol X-80 demonstrated 138%, 149% and 145%, while choline chloride: fructose (5:2): H2O (35%) NDES mixture demonstrated 243%, 225% and 238% of the total alkaloidal extraction capacity of ethanol, methanol and water, respectively at 50 °C for extraction time 1 h using ultrasonication for all experiments. Furthermore, Box-Behnken response surface design combined with the overall desirability value were successfully employed to optimize and study the individual and interactive effect of process variables such as extraction temperature, time and surfactant %, for Genapol X-80, and sonication extraction temperature, time and water concentration, for choline chloride: fructose: H2O NDES mixture, on the alkaloidal yield from C. powellii. It was evident that parameters interacting together can act in synergism if adjusted properly according to the optimized conditions to obtain maximum alkaloids extractability. It is for the first time that the efficiency of micelle-mediated extraction has been compared to that of natural deep eutectic solvents for the extraction of alkaloids and the results thoroughly discussed." @default.
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• W2833609995 date "2018-09-01" @default.
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• W2833609995 title "Green techniques in comparison to conventional ones in the extraction of Amaryllidaceae alkaloids: Best solvents selection and parameters optimization" @default.
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• W2833609995 doi "https://doi.org/10.1016/j.chroma.2018.07.009" @default.
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