Cr³⁺ solution number

Absorbance (Without interfering salts)

Interfering salts

Absorbance (with interfering salts)

% Interference

1

0.81

NaCl

0.80

1.23

2

0.83

NaNO₃

0.81

2.4

3

0.82

CaCl₂

0.83

1.22

4

0.85

ZnSO₄

0.80

5.88