Determination of cadmium in rice grains (Oryza sativa L.) using Atomic Absorption Spectroscopy (AAS)

Date

4-2002

Degree

Bachelor of Science in Agricultural Chemistry

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Norriel S Nipales

Abstract

The cadmium content of some selected rice grains commercially available in five market sites of Laguna: Calauan, Bay, Los Banos, Calamba and Cabuyao, were determined using atomic absorption spectrophotometer (AAS). Rice samples were Milagrosa rice, Matador rice, Princess rice, Dinurado, C-4, Wagwag, Sinandomeng, Bistay, C-14, Fragrant rice, Pearl rice, Intan rice, Asuzena, Laon rice, Premium rice, IR-64, IR-10, IR-52, IR-58, C-4 Special, and NFA rice. Analysis showed that rice available in Los Balios market has the highest concentration range (0.008 - 0.057 mg Cd/kg sample), followed by rice from Calamba market (0.003 0.048 mg Cd/kg sample), Bay (0.003 - 0.035 mg Cd/kg sample), Calauan market (0.002 - 0.036 mg Cd/kg sample) and lastly, rice from Cabuyao (0.004 - 0.036 mg Cd/kg sample). Duncan's Multiple Range test (DMRT) after Analysis of Variance (ANOVA) showed that rice samples are significantly different from each other. Results showed that atomic absorption spectroscopy (AAS) after dry ashing was an appropriate method to use in analyzing the cadmium content of rice grains. The limit of detection for cadmium metal is 0.001 mg/kg obtained from the lowest concentration of standard.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 2002 A13 M36

Document Type

Thesis

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