Elemental and Proximate Compositions of Sesame Seeds and the Underlying Soil from Tsegede, Ethiopia

Table 4

Concentrations of standard solutions, coefficient of determination (r²), limit of detection (LOD), recovery, and the associated relative standard deviation (RSD) values of the method used for the determination of essential metallic elements in the sesame seed samples.

Element	Concentration (mg/L)	r^2	LOD (mg/kg)	%Recovery	RSD
Fe	0.5, 1, 1.5, 2, 3, 4	0.9966	0.17	96.4	11.6
Zn	0.1, 0.4, 0.8, 1.2, 1.6	0.9984	0.30	96.9	3.79
Ni	0.1, 0.2, 0.5, 1, 2	0.9990	0.09	96.9	14.9
Cu	0.5, 1, 1.5, 2, 3	0.9989	0.15	112.4	9.04
Mn	0.1, 0.2, 0.5, 1, 2	0.9995	0.09	95.0	14.8
Ca	0.5, 1, 2, 4, 8, 10	0.9997	0.26	94.1	8.41
Mg	0.5, 1, 2, 4, 8, 10	0.9988	0.31	97.5	0.24