Capturing natural chromophores on natural and synthetic aluminosilicates
Several materials such as zeolites, clays, alumina, and hydrotalcite were tested as adsorbents of carmine cromophores from hibiscus Sabdariffa L. tropical flower. Majority of materials were unable to trap and stabilize the chromophore, some of them were not coloured and by the other ones the chromophore was chemically degraded, a change of colour was observed. The best adsorbents were natural mordenite zeolite from Oaxaca, Mexico and montmorillonite from Wyoming, USA. These two materials sequester the colour of flower and maintain this colour for several months and they resist even acid attacks. From characterization of pigments the interaction anthocyanine-adsorbent is proposed.
E. Lima M. J. Martínez-Ortiz Esteban Fregoso J. Méndez-Vivar
Universidad Autónoma Metropolitana, Iztapalapa, Av. San Rafael Atlixco No. 186, 09340 México D.F., M Instituto Politécnico Nacional – ESIQIE, Av. IPN UPALM Edif. 7, Zacatenco, 07738 México D.F., Mexico Instituto de Investigaciones en Materiales, A. P. 70-360, Universidad Nacional Autónoma de México, C Universidad Autónoma Metropolitana, Iztapalapa, Av. San Rafael Atlixco No. 186, 09340 México D.F., M
国际会议
北京
英文
2007-08-12（万方平台首次上网日期，不代表论文的发表时间）