Chromic acid digestion for the determination of lead (Pb) and cadmium (Cd) content of fresh tuna fishes from Zambales, Quezon and Palawan by graphite furnace atomic absorption spectroscopy

Date

4-2005

Degree

Bachelor of Science in Chemistry

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Lilibeth dLC Coo

Abstract

ABSTRACT

The study aims to validate the different digestion methods namely chromic acid digestion, wet digestion and dry ashing by determining the lead and cadmiun content of fresh tuna taken from Zambales, Quezon and Palawan. The results will also help to determine if the metal content of the tuna samples are within the tolerable limit. The samples in this study were prepared by chromic acid digestion. The samples were then read for their lead and cadmium concentration through Graphite Furnace Atomic Absorption Spectroscopy (GFAAS). Based front the results. the values obtained for the lead and cadmium content of the tuna samples by chromic acid digestion are greater than the lead and cadmium concentrations obtained from the analysis of the sane tuna samples by wet digestion and dry ashing. Based from the results in chromic acid digestion, the lead content of the tuna fishes obtained from Zambales, Quezon and Palawan are within the tolerable limit of 200 ug/kg for lead in wet samples of fish meat set by the Commission of the European Communities. Likewise, the cadmium content of the tuna samples are very well within the tolerable limit for cadmium in fish meat which is 50 ug/kg for wet samples as set by the Commission of the European Communities.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 2005 C4 O23

Document Type

Thesis

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