; Shi, X.L. ; Wu, K.S. Human Body Burden of Heavy Metals and Health Consequences of Pb Exposure in Guiyu, an E-Waste Recycling Town in China. Thanks for your advice, and we have added references to support this view, it is added “[30] Huang, W.L. International Journal of Environmental Research and Public Health, 2021, 18(23):12428. https://doi.org/10.3390/ijerph182312428” And we changed content as “The e-waste dismantling area we studied is an E-Waste Recycling Town located in South China, where the possible human body burden and health consequences of heavy metals exposure have been reported [30].” Point 3.
Specify the mixed standards and certified reference materials used for calculating accuracy of the digestion procedure.