Table 5 Linearity table of 7 elements
Linearity level | Vanadium (V) | Cobalt (Co) | Nickel (Ni) | Arsenic (As) | Cadmium (Cd) | Mercury (Hg) | Lead (Pb) | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Conc. In ppb | Ratio | Conc. in ppb | Ratio | Conc. In ppb | Ratio | Conc. in ppb | Ratio | Conc. in ppb | Ratio | Conc. in ppb | Ratio | Conc. in ppb | Ratio | |
Linearity Level-1 (25%) | 10.00 | 2.1902 | 5.00 | 2.5707 | 20.00 | 2.8737 | 1.50 | 0.1455 | 0.50 | 0.2031 | 3.00 | 0.0237 | 0.50 | 0.0485 |
Linearity Level-2 (50%) | 20.00 | 4.2902 | 10.00 | 5.0613 | 40.00 | 5.6086 | 3.00 | 0.2855 | 1.00 | 0.4169 | 6.00 | 0.0469 | 1.00 | 0.0944 |
Linearity Level-3 (100%) | 40.00 | 8.0322 | 20.00 | 9.4614 | 80.00 | 10.459 | 6.00 | 0.5347 | 2.00 | 0.7596 | 12.00 | 0.0887 | 2.00 | 0.1729 |
Linearity Level-4 (150%) | 60.00 | 12.296 | 30.00 | 14.572 | 120.00 | 16.083 | 9.00 | 0.8138 | 3.00 | 1.1418 | 18.00 | 0.1361 | 3.00 | 0.267 |
Linearity Level-5 (200%) | 80.00 | 15.593 | 40.00 | 19.266 | 160.00 | 20.655 | 12.00 | 1.0409 | 4.00 | 1.5426 | 24.00 | 0.1753 | 4.00 | 0.3397 |
Linearity Level-6 (250%) | 100.00 | 20.164 | 50.00 | 25.031 | 200.00 | 26.927 | 15.00 | 1.3474 | 5.00 | 1.9344 | 30.00 | 0.2279 | 5.00 | 0.441 |
Slope | 0.197 | 0.493 | 0.132 | 0.088 | 0.382 | 0.007 | 0.086 | |||||||
y-Intercept | 0.252 | −0.074 | 0.167 | 0.015 | 0.013 | 0.001 | 0.005 | |||||||
Correlation coefficient r | 0.999 | 0.999 | 0.999 | 0.999 | 1.000 | 0.999 | 0.999 | |||||||
Squared correlation coefficient (r2) | 0.999 | 0.999 | 0.999 | 0.999 | 0.999 | 0.999 | 0.999 | |||||||