49
SPECIFICATIONS
Range
0.00 to 1.60 mg/L P
Resolution
0.01 mg/L
Accuracy
±0.05 mg/L or ±5 % of reading @ 25 °C, whichever is greater
Light Source
Tungsten lamp with narrow band interference filter @ 610 nm
Method
Adaptation of the EPA method 365.2 and
Standard Methods for the Examination of
Water and Wastewater, 20
th
edition, 4500-P E, ascorbic acid method. The reaction
between orthophosphate and the reagent causes a blue tint in the sample.
REQUIRED REAGENTS
Code
Description
Q.ty/test
Q.ty/set
HI 93758A-0*
Reagent Vial
1 vial
50 vials
HI 93758-0
Phosphorus Reagent
1 packet
50 packets
*
Reagent Vial identification:
P R
, red label.
REAGENT SET
HI 93758A-50
Reagents for 50 tests
For other accessories see page 68.
MEASUREMENT PROCEDURE
• Select the
Phosphorus,
Reactive
method following one of the procedures described in the “Method
Selection” section (see page 15).
• Remove the cap from a Reagent Vial.
• Add exactly 5.0 mL of sample to the vial, while keeping the
vial at a 45-degree angle.
• Replace the cap and mix by inverting the vial a couple of
times. This is the blank.
• Place the vial into the holder and push it completely down.
•
Press the
Zero
key. The instrument will perform a zero sequence
and after a few seconds the display will show “
-0.0-
”. Now the
meter is zeroed and ready for measurement.
•
Remove the vial.
PHOSPHORUS, REACTIVE
Phosphorus, Reactive