41
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
±5 mg/L
Deviation
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 93750
A
-0
Potassium Reagent
6 drops
HI 93750
B
-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 50.
MEASUREMENT PROCEDURE
Note
: for sample preparation follow the NUTRIENT SOLUTIONS (HR) procedure at page 21.
• 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