Tap water samples

Ion-complexing compound

Ca2+ [mg/L] potentiometric titration with ASS sensors

Ca2+ [mg/L]

colorimetric titration

Strasbourg

(France)

I

70

72

Freiberg

(Germany)

II

26

28

Garda

(Italy)

I

32

35

Kolobrzeg

(Poland)

II

84

87