Ilker Ugulu et al.trans. 2020. Effect of Wastewater Irrigation on Trace Metal Accumulation in Spinach (Spinacia oleracea L.) andHuman Health Risk. Pakistan Journal of Analytical & Environmental Chemistry. 21, 1 (Jun. 2020), 92 – 101. DOI:https://doi.org/10.21743/pjaec/2020.06.11.