Hanna Instruments HI 83225 - Manual (Page 45)

45
Potassium MR
POTASSIUM MEDIUM RANGE
SPECIFICATIONS
Range 10 to 100 mg/L
Resolution 2.5 mg/L
Accuracy ±15 mg/L ±7% of reading at 25 °C
Typical EMC Dev. ±2.5 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 NUTRIENTS SOLUTION (MR) procedure at page 21.
• Select the
Potassium MR 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