Active sites for adsorption of B-carotene

Tan, Siam Hwa (1982) Active sites for adsorption of B-carotene. Masters thesis, Universiti Sains Malaysia.

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Abstract

Tabii tapak aktif dalam aluminosilikat untuk penjerapan B-karotena telah diperiksakan. Zeolit bertukaran kation mempunyai berbagai darjat pertukaran NH4+, Mg2+, Ca2+, Fe3+ dan Cu 2+ telah disediakan. Kehabluran sampel-sampel itu aelepas diaktifkan pada 450 °C telah Hiperiksakan oleh difrakse sinar X dart luaa permukaan ditentukan dengan penjerapan N2 (BET). Keasidan permukaan sampel ini juga ditentukan oleh pentitratan tak-berair dengan menggunakan penunjuk trifenilmetanol. The nature of active sites in aluminosilicates for the adsorption of B-carotene was investigated. Cation exchanged zeolites with varying + 2+ 2+ 3+ 2+ extent of exchange of NH4+, Mg2+, Ca2+, Fe3+ and Cu2+ were prepared. The crystallinity of these samples activated at 450°C were checked by x-ray diffraction and the surface areas were determined by N2 adsorption (BET). The surface acidities of the samples were also determined by. nonaqueous titration using triphenylmethanol indicator.

Item Type:	Thesis (Masters)
Subjects:	Q Science > QD Chemistry > QD1-999 Chemistry
Divisions:	Pusat Pengajian Sains Kimia (School of Chemistry)
Depositing User:	Mr Noorazilan Noordin
Date Deposited:	03 Aug 2017 09:14
Last Modified:	03 Aug 2017 09:14
URI:	http://eprints.usm.my/id/eprint/35934

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