Method

Equation

R²

Range (ppm)

Cd-ICP at 228.702 nm

I = [0.1976[Cd] + 0.897] × 10⁶

0.996

1 - 50

Cd(II)-ISE

E = 22.6log[Cd] − 211.1 (mV)

0.999

1 - 500