Determination of lead and cadmium in the edible internal organs and blood of swine and poultry using 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

Co-adviser

Ma. Jamela R. Revilleza

Committee Member

Quennie B. Manimtim

Abstract

AOAC Standard Method (972.23) of digestion was done for the analysis of lead and cadmium levels in the edible internal organs and blood of swine and poultry. Internal organs and blood are considered by Filipinos as one of their favorite foods. Possible matrix interferences were determined using standard addition technique. From the slope ratios obtained for lead of swine's kidney and poultry's intestine, which were 0 6692 and 0.6717, and for cadmium, which were 0.5371 and 0.6054, respectively, there was a significant effect of matrix on the analysis. The limit of detection (LOD) for lead and cadmium were 0.0800 µg/g and 0.0089 µg/g, respectively. Limit of quantitation (LOQ) for lead and cadmium was 0.266 µg/g and 0.030µg/g, respectively. Accuracy was evaluated by spiking known concentration of lead and cadmium in pig's liver, chicken's gizzard, and blank. The percent recovery for lead ranged from 65.00 % to 115.27 % while the percent recovery for cadmium ranged from 68.19 % to 102.46 % Results in sample analysis showed that the levels of lead ranged front not detected to 0.278 µg/g while cadmium levels ranged from not detected to 0.336 mg/g. All of the samples did not exceed the tolerable limit for lead, which is 0.3 µg/g. But for cadmium, pig's kidney, liver and pancreas with the values of 0.336 µg/g, 0.331 µg/g, and 0.331 µg/g, respectively, exceeded the accepted level of 0.2 µg/g.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 2003 C4 K35

Document Type

Thesis

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