Hanna Instruments HI 83215-2008 Series User Manual

Page 46

Potassium LR

POTASSIUM LOW RANGE

SPECIFICATIONS

Range

0.0 to 20.0 mg/L

Resolution

0.5 mg/L

Accuracy

±3.0 mg/L ±7% of reading at 25 °C

Typical EMC

±0.5 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 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 50.

MEASUREMENT PROCEDURE

Note: for sample preparation follow the IRRIGATION WATER (LR) procedure at page 19.

• Select the

Potassium LR 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 6 drops of HI 93750A-0 Potassium Reagent,

replace the cap and swirl the solution.

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

10 mL