Geraniol, a prime constituent in the leaves of Cymbopogon martinii, has a varied range of biological activities and applications. For the selective isolation of geraniol, a newer concept of combining hydrotropic extraction with ultrasound was adopted to reduce the time of extraction and hydrotrope requirement while maintaining the quality of the product. Sodium cumene sulfonate was selected as a suitable hydrotrope among sodium cumene sulfonate, sodium salicylate, sodium salt of para-toluene sulfonic acid, and resorcinol using the solubilization study. The screening of extraction parameters, viz., ultrasound amplitude, cycle time, volume of hydrotropic solution, hydrotropic concentration, ultrasonic power, and sonication time, was carried out using the Taguchi method. Optimization of process parameters was performed using central composite response surface design. A 1.9012% (w/w) yield of geraniol was obtained under optimized conditions (65% ultrasound amplitude, 65 mL volume of 1 M aqueous solution of sodium cumene sulfonate, 60 W ultrasound power, 70% cycle time, and 16 min of sonication time). A microscopic study was also performed to understand the extraction mechanism. Ultrasound assisted hydrotropic extraction turned out to be a superior sustainable alternative compared to the hydrotropic extraction because of the shortening of extraction time and reduction in hydrotrope concentration.

中文翻译：

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超声辅助的水溶萃取：绿色提纯法从马齿ym柏叶中分离出香叶醇的方法

香叶醇，在叶素成分香茅martinii，具有各种各样的生物活性和应用。对于香叶醇的选择性分离，采用了一种将水溶萃取与超声相结合的新概念，以减少萃取时间和水溶助长剂的需求，同时保持产品的质量。使用增溶研究，从枯烯磺酸钠，水杨酸钠，对甲苯磺酸钠盐和间苯二酚中选择枯烯磺酸钠作为合适的水溶助长剂。提取参数的筛选，即超声振幅，循环时间，水溶溶液的体积，水溶浓度，超声功率和超声处理时间，是使用Taguchi方法进行的。使用中央复合响应面设计进行了工艺参数的优化。A 1。在最佳条件下（65％超声振幅，65 mL体积的1 M枯烯磺酸钠水溶液，60 W超声功率，70％循环时间和16分钟超声处理时间）获得了9012％（w / w）香叶醇的收率）。还进行了显微镜研究以了解提取机理。与水溶萃取相比，超声辅助水溶萃取被证明是一种更好的可持续替代方法，因为它缩短了萃取时间并降低了水溶助长剂的浓度。