Table 5 Wavelength, working standard concentration, correlation coefficient and equation of the calibration curves for determination of metals using FAAS
From: Levels of selected metals in leaves of Cannabis sativa L. cultivated in Ethiopia
Metal | Wavelength (nm) | Method detection limit (μg/g dry weight) | Concentration of working standards (mg/L) | Correlation coefficient (r) | Equation for calibration curves |
|---|---|---|---|---|---|
Ca | 422.7 | 25 | 0.25, 0.5, 0.75, 1.0 | 0.9997 | Y = 0.49265 X − 2.64 × 10−3 |
Cr | 357.9 | 1 | 1.0, 2.0, 3.0,4.0 | 0.9997 | Y = 0.09698 X + 5.00 × 10−4 |
Ni | 232.0 | 8 | 1.0, 2.0, 3.0,4.0 | 0.9998 | Y = 0.04318 X − 6.22 × 10−3 |
Cu | 324.8 | 19 | 0.25, 0.5, 1.0, 2.0 | 0.9999 | Y = 0.20258 X − 2.80 × 10−4 |
Zn | 213.9 | 31 | 0.25, 0.5, 0.75, 1 | 0.9999 | Y = 0.66746 X − 1.13 × 10−3 |
Cd | 228.8 | 0.4 | 0.25, 0.5, 0.75, 1 | 0.9997 | Y = 0.49265 X − 2.64 × 10−3 |
Pb | 217.0 | 6.0 | 1.0, 2.0, 3.0,4.0 | 0.9995 | Y = 0.09786 X + 4.52 × 10−3 |