Hanna Instruments HI 83203-2008 - Manual (Page 21)

40 41 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
4
3- ).
• 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
2
O
5
).
• Press the or to go back to the measurement screen.
INTERFERENCES
Sulfide
Chloride above 150000 mg/L )
Calcium above 10000 mg/L as CaCO
3
Magnesium above 40000 mg/L as CaCO
3
Ferrous iron above 100 mg/L
Phosphate HR
PHOSPHATE HIGH RANGE
SPECIFICATIONS
Range 0.0 to 30.0 mg/L
Resolution 0.1 mg/L
Accuracy ±1 mg/L ±4% of reading
Typical EMC Dev. ±0.1 mg/L
Light Source Tungsten lamp with narrow band interference filter @ 525 nm
Method Adaptation of the Standard Methods for the Examination of Water and Wastewater,
18 th edition, Amino Acid method. The reaction between phosphate and reagents
causes a blue tint in the sample.
REQUIRED REAGENTS
Code Description Quantity
HI 93717A-0 Molybdate 10 drops
HI 93717B-0 Reagent B 1 packet
REAGENT SETS
HI 93717-01 Reagents for 100 tests
HI 93717-03 Reagents for 300 tests
For other accessories see page 46.
MEASUREMENT PROCEDURE
• Select the Phosphate HR method using the procedure de-
scribed in the Method Selection section (see page 11).
• Fill the cuvette with 10 mL of unreacted 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.
• Add 10 drops of HI 93717A-0 Molybdate reagent.
10 mL
x 10