Figure 2. Calibration curve (concentration vs absorbance) for Ni, Cr, Cu, Mn, Co, Pb

From

Assessing Heavy Metals Pollution in the Agricultural Lands of Gaza Strip that Has Undergone Three Successive Wars

Al- Najar, H. Alrayes N., Dokhan Al., Saqer A., Silmi R., S. Al-Kurdi

American Journal of Environmental Protection. 2015, 3(4), 151-158 doi:10.12691/env-3-4-6