Thanks for your advice, we have added the specific parameters and modified them as follows:” When the collection was completed, the samples were taken back to the laboratory and stored first in the refrigerator (‒20°C). Then, the feces were freeze‒dried (under vacuum conditions, the vacuum freeze drier temperature is ‒40°C to ‒50°C for 48 h) after measuring the weight with a vacuum freeze dryer.” Point 4.
Dear Authors and Editor, the work presents interesting results on estimation of the soil ingestion of selected children from e‒waste disassembly areas by collecting and analyzing selected tracer metals in matched samples of their consumed food, feces, and urine, as well as soil samples from their play areas.