Determination of the levels of lead and cadmium in different canned fish products by flame atomic absorption spectrophotometry

Date

4-2003

Degree

Bachelor of Science in Chemistry

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Teofila DC Villar

Abstract

ABSTRACT

OCAMPO, MARICAR SANTILLAN, College of Arts and Sciences, University of the Philippines Los Banos, April, 2003. Determination of the Levels of Lead and Cadmium in Different Canned Fish Products by Flame Atomic Absorption Spectrophotometry.

Adviser: Prof. Teofila dC Villar

Flame Atomic Absorption Spectrophotometry was used in the determination and analysis of Ph and Cd in five different brands of canned sardines, tuna and mackerel. AOAC standard method was used in sample digestion

Slopes of standard calibration curve and standard addition curve were compared to check possible matrix interferences. Results showed that sample matrix has no significant effects in lead and cadmium determinations in different canned fish products. Percentage recoveries were also determined to assess the accuracy of the method. Percent recoveries for spiked blank (94.13 to 107.07 %) were higher than percent recoveries for spiked sample (70.38 to 84.37 %). This shows that sample matrix affects the recovery of lead in sample analysis.

Lead and Cd concentrations in canned sardines ranged from 0.00963 to 0.0737 mg/kg and 0.0106 to 0.0324 mg/kg, respectively. No values in the range exceeded the maximum permissible Pb and Cd levels of 0.3 mg/kg set by World Health Organization (1985) and 0.05 mg/kg as set by European Community (1985), respectively.

Mean lead concentration in canned mackerel ranged from 0.0343 to 0.1546 mg/kg. No values in the range exceeded the maximum permissible lead levels. Mean cadmium concentration in canned mackerel ranged from 0.0243 to 0.0624 mg/kg. Brands MG and MP exceeded the maximum permissible Cd level of 0.05 mg/kg. Mean lead concentration in canned tuna ranged from 0.0093 to 0.0941 mg/kg. No brands exceeded the maximum permissible lead levels.

Mean cadmium concentration ranged from 0.0012 to 0.0658 mg/kg. Brand TF with mean Cd concentration of 0.0658 mg/kg exceeded the maximum permissible Cd level of 0.05 mg/kg.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 2003 C4 O23

Document Type

Thesis

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