ANALISA LOGAM BERAT TIMBAL (Pb) DAN TEMBAGA (Cu) PADA SINGKONG YANG DIJUAL DISEPANJANG JALAN PASAR SUKARAMAI KOTA MEDAN

Abstract

Commodities of tubers, especially cassava, have the potential to develop in the food sector as a type of local food in meeting the needs of the community for the lack of supply of rice which contains nutrients and antioxidants which make it important for health. Therefore, cassava tubers consumed must be guaranteed hygiene and safety. However, many types of tubers circulating in the community are not guaranteed for their safety because they are suspected to have been contaminated with heavy metals such as lead (Pb), copper (Cu), especially in tubers that are planted and sold on the roadside. The purpose of this study was to determine whether or not the heavy metals lead and copper were contained in cassava according to BPOM No. 23 of 2017, namely lead ≤0.20 mg/kg and copper ≤0.05 mg/kg. This type of research was experimental research and descriptive research design, the time of this research was in April 2023. Four samples were taken with laboratory tests using qualitative lead and copper tests and semi-quantitative gravimetry on lead. Samples were taken at Sukaramai Market in Medan City and the research was carried out at the Food and Beverage Chemistry Laboratory of Medan Health Polytechnic of Ministry of Health, Department of Medical Laboratory Technology. The results of laboratory examinations for heavy metal content in cassava which were tested qualitatively showed that all samples were negative for lead and copper metals. In the semi-quantitative gravimetric test on lead on 4 samples of cassava, the lead content in sample 1 was 0.00546 mg/kg, sample 2 was 0.00683 mg/kg, sample 3 was 0.01229 mg/kg and sample 4 was 0. .00956 mg/kg indicates that all cassava samples are still below the threshold according to BPOM No. 23 of 2017, namely 0.20 mg/kg.