Determination of Major and Trace Metals in Date Palm Fruit (Phoenix dactylifera) Samples Using Flame Atomic Absorption Spectrometry and Assessment of the Associated Public Health Risks

Table 4

The parameters for the calibration of the FAAS instrument.

Elements	Wavelength (nm)	Standard concentration (mg/L)	Calibration equation
Na	589	1, 2, 4, 8	y = 0.0891x + 0.0276	0.998
Ca	422.7	0.25, 0.5, 1, 2	y = 0.0118x − 0.0036	0.993
Mn	279.5	0.25, 0.5, 1, 2	y = 0.0217x − 0.001	0.999
Fe	248.3	0.25, 0.5, 1, 2	y = 0.0122x − 0.0029	0.992
Ni	232	1, 2, 3, 4	y = 0.0045x + 2E − 05	0.996
Cu	324.7	0.25, 0.5, 0.75, 1	y = 0.0118x − 0.0036	0.993
Zn	2139	0.25, 0.5, 0.75, 1	y = 0.051x + 0.0008	0.996
Pb	283.2	1, 2, 3, 4	y = 0.0027x + 0.001	0.998
Cd	213.9	0.25, 0.5, 0.75, 1	y = 0.0273x − 0.0016	0.980