Analytes

Method

Code

Determination lower limit, %

Ca²⁺

Volumetry

Titr -91

0.5

Mg²⁺

Volumetry

Titr -92

0.5

Na⁺

АES

АES -99

0.05

K⁺

АES

АES -100

0.05

Cl^-

Volumetry

Titr -77*

5.0

SO₄^2-

Gravimetry

Grav -101

20.0

CO₃^2-

Volumetry

Titr -93

1.0

HCO₃^-

Volumetry

Titr -94

1.0

Total dissolved solids

Volumetry

Titr

0.1

H₂O^-

Gravimetry

Grav -15*

0.05