Quality measurements. Application of methylene blue adsorption to cotton fiber specific area measurement. Part 1. Methodology

Kaewprasit C., Héquet Eric, Abidi Nouredine, Gourlot Jean-Paul. 1998. Quality measurements. Application of methylene blue adsorption to cotton fiber specific area measurement. Part 1. Methodology. Journal of Cotton Science, 2 (4) : 164-173.

Note générale : Accéssible sur internet : http://www.jcotsci.org/1998/issue04/toc.html

Résumé : Adsorption of methylene blue or 3,7 bis (dimethylamino) phenothiazin-5-ium ion was used to measure the specific surface areas of six cotton fibers taken from the International Calibration Cotton Standards. A kinetic study of this dye's adsorption to the cotton fibers was first conducted to establish the adsorption isotherms. From this study, the adsorption isotherm was determined at 25°C for 24 hours with the concentration of methylene blue solution in the range 0.004 to 0.18 x 10-3 kg L-1. After 24 hours, the concentration of methylene blue at the adsorption equilibrium was analyzed by a spectrophotometer at a wavelength of 660 nm. The specific surface area was then calculated from this isotherm. The specific surface areas for these cottons, B-26, C-36, D-5, E-4, G-17, and I-26 were found to be 32.32, 32.42, 34.48, 52.72, 43.96, and 29.91 x 10-3 km2 kg-1, respectively. The reliability of this method seems very good.

Mots-clés Agrovoc : coton, qualité technologique, propriété technologique, mesure (activité), méthode

Classification Agris : Q60 - Traitement des produits agricoles non alimentaires

Auteurs et affiliations

• Kaewprasit C.
• Héquet Eric, CIRAD-CA-COTON (FRA)
• Abidi Nouredine
• Gourlot Jean-Paul, CIRAD-CA-COTON (FRA) ORCID: 0000-0002-3231-3242

Source : Cirad - Agritrop (https://agritrop.cirad.fr/390501/)

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