DETERMINATION OF ESSENTIAL AND NON METALS IN COFFEE BEANS DETERMINATION OF ESSENTIAL AND NON-ESSENTIAL METALS IN COFFEE BEANS KOCHCHORE DISTRICT, ZONE, ETHIOPIA

<strong>ABSTRACT</strong>: Determination of essential and non-essential elements in coffee beans on some selected metals (Mg, K, Ca ,Mn, Cu,) and toxic metals (Cd and Cr,) were determined in coffee (Coffee arabica) beans, of Gedeo zone, Ethiopia using Atomic Absorption Spectroscopy. The decomposition of sample took places in a microwave digestion system with HNO3 and H2O2 reagents .partial validation of method was performed by using certified reference material (NCS ZC 73014) In coffee beans, among the essential metals, concentration of K was determined to be the equal with Ca. Cu is present in highest concentration followed by Mg and, Mn, in coffee beans; Toxic metals were not detected in the coffee beans (Cd and Cr). The research emphasizes the safety and quality of coffee beans in the Kochore district, which is known for its coffee production. The findings reassure consumers about the integrity of their coffee choices, promoting sustainable coffee production in the region. Importantly, the study found that the levels of non essential metals in the coffee beans were below the maximum limits set by the Food and Agriculture Organization (FAO) and the World Health Organization (WHO). This finding is crucial as it confirms that the coffee beans are safe for consumption and do not pose health risks. Among the essential elements, copper were present in the highest amount, while harmful metals like cadmium (Cd) were not detected in the coffee beans from the Kochore district. This suggests a low risk of contamination in the coffee produced in this area Overall, the abstract encapsulates the study's focus on the nutritional content, safety, and quality of coffee beans, particularly in the context of sustainable production practices in Ethiopia.