DETERMINATION OF THE CONCENTRATION OF CHITOSAN IN POWDER BY CAPILLARY VISCOSIMETRY

• Autores: Rodríguez Llegado, Agustín A., Cjuno H, Jesús A.
• Formato: artículo
• Fecha de Publicación: 2020
• Institución: Sociedad Química del Perú
• Repositorio: Revista de la Sociedad Química del Perú
• Lenguaje: español
• OAI Identifier: oai:rsqp.revistas.sqperu.org.pe:article/269
• Enlace del recurso: http://revistas.sqperu.org.pe/index.php/revistasqperu/article/view/269
• Nivel de acceso: acceso abierto
• Materia: chitosan; viscosity; pH; concentration; quitosano; viscosidad; concentración

The objective of this work has been to develop a procedure for the determination of the concentration of chitosan in powder samples, by capillary viscosimetry of Ostwald (capillary of 0.55 ± 0.02 mm internal diameter). Standard chitosan solutions between 461 mg/liter up to 9138 mg/liter and pH 1.24 were prepared for all cases. Tests were also carried out at temperatures between 20° to 50°C, observing linearity with the concentration until before 9138 mg/liter. The most important dependence was the relative viscosity (ηr) versus the concentration (concordant with the Poiseuille equation) which in the range 461 mg/liter to 2808 mg/liter gave a linear dependence with r2= 0.995, enabling the analysis of samples for the content of chitosan with consistent results and comparable with the referentials.