Design and performance evaluation of ionic - liquids - based microwave - assisted environmentally friendly extraction technique for camptothecin and 10 - hydroxycamptothecin from samara of camptotheca acuminata / Shu-ya Wang in Industrial & engineering chemistry research, Vol. 50 N° 24 (Décembre 2011)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 50 N° 24 (Décembre 2011) . - pp. 13620-13627 Titre : Design and performance evaluation of ionic - liquids - based microwave - assisted environmentally friendly extraction technique for camptothecin and 10 - hydroxycamptothecin from samara of camptotheca acuminata Type de document : texte imprimé Auteurs : Shu-ya Wang, Auteur ; Lei Yang, Auteur ; Yuan-gang Zu, Auteur Année de publication : 2012 Article en page(s) : pp. 13620-13627 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Microwave Ionic liquid Design Résumé : Ionic-liquids-based, microwave-assisted extraction (ILMAE) was successfully applied to the extraction of two alkaloids: camptothecin (CPT) and 10-hydroxycamptothecin (HCPT) from samara of Camptotheca acuminata. Ten different types of 1-alkyl-3-methylimidazolium, with different cations and anions, were investigated in this work, and 1-hexyl-3-methylimidazolium bromide ([C8MIM]Br) solution was selected as the optimal solvent. In addition, the extraction parameters, including ionic liquid concentration, soak time, microwave irradiation power, irradiation time, solid—liquid ratio, and number of extraction cycles, were optimized. The optimal conditions were as follows: 0.8 M [C8MIM]Br; soak time, 2 h; microwave irradiation power, 385 W; irradiation time, 8 min; solid-liquid ratio, 1:12 (g/mL); and two of extraction cycles. No degradation of the target analytes have been observed at the optimum conditions, as evidenced from the stability studies performed with standard CPT and HCPT. The proposed method also shows high reproducibility. Compared with the traditional methods, the proposed approach demonstrates higher efficiency in a shorter extraction time (from 4 h to 8 min), which demonstrates that ILMAE is a rapid, efficient, and simple sample extraction technique. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25299822 [article] Design and performance evaluation of ionic - liquids - based microwave - assisted environmentally friendly extraction technique for camptothecin and 10 - hydroxycamptothecin from samara of camptotheca acuminata [texte imprimé] / Shu-ya Wang, Auteur ; Lei Yang, Auteur ; Yuan-gang Zu, Auteur . - 2012 . - pp. 13620-13627. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 24 (Décembre 2011) . - pp. 13620-13627 Mots-clés : Microwave Ionic liquid Design Résumé : Ionic-liquids-based, microwave-assisted extraction (ILMAE) was successfully applied to the extraction of two alkaloids: camptothecin (CPT) and 10-hydroxycamptothecin (HCPT) from samara of Camptotheca acuminata. Ten different types of 1-alkyl-3-methylimidazolium, with different cations and anions, were investigated in this work, and 1-hexyl-3-methylimidazolium bromide ([C8MIM]Br) solution was selected as the optimal solvent. In addition, the extraction parameters, including ionic liquid concentration, soak time, microwave irradiation power, irradiation time, solid—liquid ratio, and number of extraction cycles, were optimized. The optimal conditions were as follows: 0.8 M [C8MIM]Br; soak time, 2 h; microwave irradiation power, 385 W; irradiation time, 8 min; solid-liquid ratio, 1:12 (g/mL); and two of extraction cycles. No degradation of the target analytes have been observed at the optimum conditions, as evidenced from the stability studies performed with standard CPT and HCPT. The proposed method also shows high reproducibility. Compared with the traditional methods, the proposed approach demonstrates higher efficiency in a shorter extraction time (from 4 h to 8 min), which demonstrates that ILMAE is a rapid, efficient, and simple sample extraction technique. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25299822

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