Detection of lead and cadmium residues in beef before and after cooking in ceramic, glass and granite pots

Abstract

I n the current study, migration of heavy metals represent by lead (pb) and cadmium (Cd) were investigated before and after cooking using different cooking made pots (ceramic, glass and granite). Fifteen raw beef samples were tested for the presence of both two elements residues before cooking. Lead was observed in all raw meat samples out of which,11 samples (73.3%) were accepted and 4 samples (26.7%) were not-accepted. On the other side, cadmium was mostly not detected (lower than 0.01 mg/kg) in all tested raw according Standers Three of tested beef samples that had lower content of both elements were divided into three portions to be cooked in ceramic, glass and granite cooking pots. Lead noticed to have migrated level from ceramic pots exceeding the acceptable limit (0.1 mg/kg) with a mean value of 0.32±0.21 mg/kg followed by granite which recorded 0.093±0.01mg/kg and lastly for glass pots with mean of 0.072±0.005mg/kg, while cadmium was within the acceptable limit for all tested samples after cooking(0.05 mg/kg) except for one sample which was cooked in ceramic pot with 33.3% not accepted. This study demonstrated that ceramic pots was the most leachable of lead followed by granite and lastly glass pots. The current study supported the need to use a good quality material in cooking pots manufacturing.