"Preliminary investigation on the development of sol-gel derived and nata de coco- modified electrode for mercury (II) analysis"

Date

4-2001

Degree

Bachelor of Science in Chemistry

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Norriel S Nipales

Co-adviser

Jose H. Santos

Committee Member

Evelyn B. Rodriguez

Abstract

A modified sol-gel electrode (NdCSGE) was constructed by immobilizing powdered Nata de Coco, a bacterial cellulose found to exhibit cation and anion exchange capacity. The electrode was found to readily detect 14g(11) at low concentrations. The electrode which showed the best response was composed of a 3:7 Nata de Coco-graphite ratio in a 5501.1.1.. stock sol solution. The NdCSGE was used in the voltammetric measurements of Hg(11) in aqueous solutions giving best responses at 60 minutes accumulation time, mercury concentration range of 50 to 300 ppm using 0.1 M as supporting electrolyte. Among Nom de Coco, DEAE Sephadex, Arnberlite and Chitosan, Nata de Coco was found to be a more stable cation exchanger in terms of the degree of swelling in water. The electrode is not regenerated on its own but can be reused after ten minutes of regeneration in 0.1M EDTA. The analytical performance demonstrated that the sol-gel method is suitable for the immobilization of Nata de Coco for electroanalytical applications.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 2001 C4 L68

Document Type

Thesis

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