Trigonometri : Journal Matematika dan Ilmu Pengetahuan Alam

Articles

Vol. 8 No. 1 (2025): Trigonometri : Journal Matematika dan Ilmu Pengetahuan Alam, ISSN 3030-8496

ANALISIS CEMARAN LOGAM BERAT PADA BERAS DENGAN METODE AOAC DI LABORATORIUM DINAS PANGAN PROVINSI SUMATERA BARAT

Submitted
December 20, 2025
Published
2025-12-20

Abstract

Rice is a staple food for Indonesians that is at risk of heavy metal contamination from the environment and human activities. This study aims to analyze the levels of lead (Pb) and cadmium (Cd) contamination in rice samples circulating in the West Sumatra region. The research method used is qualitative research with quantitative analysis using the AOAC (Association of Official Analytical Chemists) standard method. Rice samples were digested using a microwave digestion system with HNO_3 65% and H_2O_2 30% solvents, then analyzed using Graphite Furnace Atomic Absorption Spectrophotometry (GFA-AAS). The linearity test results showed good correlation values (r) of 0.9969 for Pb and 0.99973 for Cd. Analysis of six types of local rice showed variations in heavy metal levels; the highest levels were found in Suntiang Ameh rice samples (05/CL/SA/SJ/BKP) with a Pb concentration of 0.221 mg/kg and Cd of 0.140 mg/kg. Overall, the test results provide an overview of rice safety levels in West Sumatra as a basis for food quality supervision.

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