In Turabah province of Saudi Arabia, infant formula and children′s food products were investigated to
determine the concentrations of essential trace elements, namely Mn, Ni, V and Si, and toxic trace
elements, namely Al, Ba, Pb, Cd, and As, present in them. Their daily intake amounts were calculated
and compared with provisional tolerable daily intake (PTDI), which was calculated based on the
provisional tolerable weekly intake (PTWI), which was recommended by joint FAO/WHO. The results
obtained were found to be below the PTDI levels. Some samples exhibited a large amount of Al. The
PTWI of Si and V is not established; however, their concentrations were compared with those reported
in other studies. In some samples, a high concentration of Si was observed. The method employed for
evaluation was based on the limit of quantification (LOQ), limit of detection (LOD), and recovery
percent of 92.3–101.6%. Accuracy and precision were employed for evaluating the results