Hanna-instruments HI 83225 Manuel d'utilisateur télécharger pdf (Page 42)

Potassium HR

POTASSIUM HIGH RANGE

SPECIFICATIONS

Range 20 to 200 mg/L

Resolution 5 mg/L

Accuracy ±30 mg/L ±7% of reading at 25 °C

Typical EMC Dev. ±5 mg/L

Light Source Tungsten lamp with narrow band interference filter @ 610 nm

Method Adaptation of the Turbidimetric Tetraphenylborate method. The reaction between

Potassium and reagents causes turbidity in the sample.

REQUIRED REAGENTS

Code Description Quantity

HI 93750A-0 Potassium Reagent 6 drops

HI 93750B-0 Powder Reagent 1 packet

REAGENT SETS

HI 93750-01 Reagents for 100 tests

HI 93750-03 Reagents for 300 tests

For other accessories see page 57.

MEASUREMENT PROCEDURE

Note: for sample preparation follow the NUTRIENT SOLUTIONS (HR) procedure at page 22.

• Select the

Potassium HR

method using the procedure described in the

Method Selection

section (see

page 12).

• Fill the cuvette with 10 mL of sample, up to the mark.

• Add six drops of HI 93750A-0, replace the cap and

swirl the solution.

• Place the cuvette into the holder and close the lid.

10 mL

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Hanna-instruments HI 83225 Manuel d'utilisateur Page 42