Metals | Concentration of the standards in (mg/l) | Correlation coefficients | Equation for calibration curve (A = mC + b) |
Ca | 5, 10, 15, 20, 25 | 0.9997 | A = 0.1159 C + 0.0137 |
Mg | 5, 10, 15, 20, 25 | 0.998 | A = 0.177 C + 0.2276 |
K | 0.065, 0.41, 0.785, 1.11, 1.57 | 0.998 | A = 0.1676 C − 0.0858 |
Fe | 1, 2.5, 5, 8, 10 | 0.9987 | A = 0.028 C − 0.0048 |
Mn | 0.5, 1.5, 3, 5, 9 | 0.998 | A = 0.1358 C + 0.0872 |
Zn | 0.25, 0.5, 1.0, 1.5, 2.0 | 0.999 | A = 0.333 C − 0.0126 |
Cu | 0.15, 0.35, 0.61, 0.84, 1.5 | 0.9999 | A = 0.0837 C + 0.0169 |
Cr | 0.05, 0.5, 1.0, 1.5, 2.0 | 0.9997 | A = 0.01 C + 0.0017 |
Cd | 0.5, 1.0, 1.5, 2.0, 2.5 | 0.997 | A = 0.292 C + 0.056 |