Improved procedures for extraction of water-extractable carbohydrates from particulate organic matter
نویسندگان
چکیده
− The present work presents improvements to the existing methods for extraction of carbohydrates with water. In order to test the effects of extraction factors on the yield of carbohydrates, extractions of water-soluble carbohydrates were performed with two contrasting samples (suspended particulate organic matter from the high turbidity zone of the Gironde estuary and sedimentary organic matter from the Arcachon lagoon) under different experimental conditions. Results show that: (i) boiling water applied for 30 min yielded the best result for water-soluble carbohydrates in both samples; (ii) sonic disruption had a strong influence on the recovery rate of water-soluble carbohydrates – a steady yield was reached after a 3-min treatment; (iii) almost all the water-extractable carbohydrates are removed after the third extraction. Consequently, a general method is proposed to improve the extraction of water-extractable carbohydrates from particulate matter. © 2001 Ifremer/CNRS/IRD/Éditions scientifiques et médicales Elsevier SAS Résumé − Amélioration de la procédure d’extraction des carbohydrates soluble dans l’eau de la matière organique particulaire. Sur la base de deux échantillons organiques de nature opposée (matières en suspension de la zone de maximum de turbidité de l’estuaire de la Gironde et sédiments du bassin d’Arcachon), on a pu évaluer les effets de différents facteurs d’extraction sur la méthode d’extraction des sucres par l’eau. Ainsi, le rendement d’extraction des sucres solubles devient optimum (i) lorsque l’extraction est conduite à 100 °C et dans une période minimale de 30 min ; (ii) lors de l’application d’un traitement aux ultrasons de 3 min ; (iii) après trois extractions successives. Une optimisation de l’extraction des sucres solubles est alors proposée en vue de l’harmonisation des méthodes d’extraction. © 2001 Ifremer/CNRS/IRD/Éditions scientifiques et médicales Elsevier SAS extraction factors / particulate organic matter / water-soluble carbohydrates facteurs d’extraction / matière organique particulaire / sucres solubles *Correspondence and reprints: fax: +33 5 56 84 08 48. E-mail address: [email protected] (D. BURDLOFF). © 2001 Ifremer/CNRS/IRD/Éditions scientifiques et médicales Elsevier SAS. Tous droits réservés S0399178401011513/FLA 343 OCEANOLOGICA ACTA ⋅ VOL. 24 – No. 4
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تاریخ انتشار 2001