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MAGNESIUM HARDNESSMAGNESIUM HARDNESS

MAGNESIUM HARDNESS

Hardness Mg

SPECIFICATIONS

Range 0.00 to 2.00 mg/L

Resolution 0.01 mg/L

Accuracy ±0.11 mg/L ±5% of reading

Typical EMC ±0.02 mg/L

Deviation

Light Source Tungsten lamp with narrow band interference

filter @ 525 nm

Method Adaptation of the Standard Methods for the

Examination of Water and Wastewater, 18

edition, EDTA colorimetric method. The reaction

between magnesium and reagents causes a red-

dish-violet tint in the sample.

REQUIRED REAGENTS

Code Description Quantity

HI 93719A-0 Mg indicator 0.5 mL

HI 93719B-0 Alkali solution 0.5 mL

HI 93719C-0 EDTA solution 1 drop

HI 93719D-0 EGTA solution 1 drop

REAGENT SETS

HI 93719-01 Reagents for 100 tests

HI 93719-03 Reagents for 300 tests

For other accessories see page 141.

MEASUREMENT PROCEDURE

• Select the program number corresponding to Hardness Mg on the

secondary LCD by pressing PROGRAM W and V.

• Rinse a graduated beaker several times

with unreacted sample, before filling it

to the 50 mL mark with the sample.

• Add 0.5 mL of HI 93719A Magnesium

indicator solution, then swirl to mix.

Hanna Instruments C 99 series User Manual

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