Algorithm

n

R2

RMSE (ug/L)

RMSE (%)

p-value

Intercept

Slope

OC3M

9

0.58

0.15

34%

0.02

−0.65

0.85

Carder

9

0.58

0.20

44%

0.02

−0.55

1.2

GSM

8

0.62

0.11

22%

0.02

−0.46

0.65