Analysis of the total content of pb và cd in Brassica juncea (L.) from several trational markets located in Bien Hoa city, Dong Nai province

Abstract

    In this study, we conducted an analysis of the total lead (Pb) and cadmium (Cd) content in 45 samples of Brassica juncea (L.) collected from three traditional markets in Bien Hoa City, Dong Nai Province, using atomic absorption spectroscopy with flame technique (F-AAS) based on TCVN 7602: 2007 and TCVN 7768-2: 2007. The results showed that the limits of detection (LOD) and limits of quantification (LOQ) determined by the calibration curve method were 0.0912 mg/L and 0.3055 mg/L for Pb, and 0.0956 mg/L and 0.3187 mg/L for Cd, respectively. Among 45 collected samples of B. juncea, 38 samples had total Pb levels that met food safety standards according to QCVN (8-2:2011/BYT), while 7 samples exceeded the permissible limit (> 0.3 mg/L). In contrast, Cd levels in all samples were undetectable, thus meeting food safety standards. The study's findings suggest that market managers should implement policies to control the food sources sold in traditional markets, especially at mobile and non-fixed stalls.