Determination of the Level of Heavy Metals in the Selected Cereals from Debre Markos Local Market, Amhara Region, Ethiopia

Table 2

Recovery test results and calibration curve equations for the determination of heavy metals in selected cereals.

Analyte	Recovery (%)	Regression equations (Y = mx + b)	R ^2	Wavelength (nm)
Cr	85.6–107.2	Y = 13969x + 3289.8	0.9973	425.433
Cu	91.6–106.4	Y = 103051x + 34163	0.9966	324.754
Pb	98.4–112.8	Y = 1899.4x + 200.23	0.9976	405.754
Cd	99.2–110.4	Y = 13829x + 4869.5	0.9983	228.802

Y = intensity; m = slope; x = concentration (mg/L); b = intercept.