59
PHOSPHORUS, REACTIVE HIGH RANGE
Phosphorus, Reactive HR
SPECIFICATIONS
Range
0.0 to 32.6 mg/L P
Resolution
0.1 mg/L
Accuracy
±0.5 mg/L or ±5 % of reading @ 25 °C, whichever is greater
Light Source
Tungsten lamp with narrow band interference filter @ 420 nm
Method
Adaptation of the
Standard Methods for the Examination of Water and Wastewater,
20
th
edition, 4500-P C, vanadomolybdophosphoric acid method. The reaction between
orthophosphate and the reagents causes a yellow tint in the sample.
REQUIRED REAGENTS
Code
Description
Q.ty/test
Q.ty/set
HI 93763A-0*
Reagent Vial
1 vial
50 vials
DEIONIZED120
Deionized Water
5 mL
1 bottle
*
Reagent Vial identification:
P RHR
, green label.
Note
: Store the unused vials in their container in a cool and dark place.
REAGENT SET
HI 93763A-50
Reagents for up to 49 tests
For other accessories see page 68.
MEASUREMENT PROCEDURE
Reagent Blank Correction
: This method requires a reagent blank correction. A single blank vial may be used
more than once; the blank vial is stable up to two weeks (room temperature). For most accurate measurement,
run a blank for each set of measurements and always use the same lot of reagents for blank and samples.
• Select the
Phosphorus, Reactive High Range
method following one of the procedures described in the
“Method Selection” section (see page 15).
• Remove the caps from two Reagent Vials.
• Add exactly 5.0 mL of sample to one vial (sample vial), and 5.0 mL of deionized water to the other
vial (blank vial), while keeping the vials at a 45-degree angle.
←
green label
→