Hanna Instruments HI 83208-2008 User Manual

Page 30

Phosphate LR

PHOSPHATE LOW RANGE

SPECIFICATIONS

Range

0.00 to 2.50 mg/L

Resolution

0.01 mg/L

Accuracy

±0.04 mg/L ±4% of reading

Typical EMC Dev. ±0.01 mg/L

Light Source

Tungsten lamp with narrow band interference filter @ 610 nm

Method

Adaptation of the Ascorbic Acid method. The reaction between phosphate and the

reagent causes a blue tint in the sample.

REQUIRED REAGENTS

Code

Description

Quantity

HI 93713-0

Powder reagent

1 packet

REAGENT SETS

HI 93713-01 Reagents for 100 tests
HI 93713-03 Reagents for 300 tests
For other accessories see page 73.

MEASUREMENT PROCEDURE

• Select the

Phosphate LR method using the procedure

described in the

Method Selection section (see page 12).

• Rinse, cap and shake the cuvette several times with unreacted

sample. Fill the cuvette with 10 mL of sample up to the
mark and replace the cap.

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

• Press ZERO key. The display will show “-0.0-” when the meter is

zeroed and ready for measurement.

• Remove the cuvette and add the content of one packet of

HI 93713-0 reagent. Replace the cap and shake gently
(for about 2 minutes) until the powder is completely
dissolved.

10 mL

Phosphate HR

• Add the content of one packet of HI 93717B-0 Phosphate

HR Reagent B to the cuvette. Replace the cap and shake
gently until completely dissolved.

• Reinsert the cuvette into the instrument.

• Press TIMER and the display will show the countdown prior

to the measurement or, alternatively, wait for 5 minutes
and press READ. When the timer ends the meter will
perform the reading. The instrument displays the results in
mg/L of phosphate (PO

• Press the or to access the second level of functions.
• Press the Chem Frm functional key to convert the result in mg/L of phosphorus (P) and phosphorus

pentoxide (P

• Press the or to go back to the measurement screen.

INTERFERENCES

Sulfide
Chloride above 150000 mg/L )
Calcium above 10000 mg/L as CaCO

Magnesium above 40000 mg/L as CaCO

Ferrous iron above 100 mg/L