
11
A zero reading was not taken. Follow the
instruction described in the measurement
procedures for zeroing the meter.
Under range. A blinking "0.00" indicates
that the sample absorbs less light than the
zero reference. Check the procedure and
make sure that you use the same vial for
reference (zero) and measurement (unless
a reagent blank correction procedure is
prescribed).
1) A flashing value of the maximum
concentration indicates an over range
condition. The concentration of the sample
is beyond the programmed range: dilute
the sample and rerun the test.
2) A flashing value lower than the maximum
concentration indicates a low signal-to-
noise ratio condition. In this case accuracy
of the result is not guaranteed. Repeat the
reading procedure.
70
PHOSPHORUS, TOTAL HIGH RANGE
SPECIFICATIONS
Range
0.0 to 100.0 mg/L (as PO
4
3-
)
Resolution
0.1 mg/L
Precision
±3.0 @ 75.0 mg/L
Typical EMC
±0.1 mg/L
Deviation
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. A persulfate digestion converts organic
and condensed inorganic forms of phosphates to
orthophosphate. Then the reaction between
orthophosphate and the reagents causes a yellow
tint in the sample.
REQUIRED REAGENTS
Code
Description
Q.ty/test Q.ty/set
*
Reagent Vial
1 vial
50 vials
---
Deionized Water
5 mL
1 bottle
---
Potassium Persulfate
1 packet 50 packets
---
NaOH Solution 1.54 N
2 mL
1 bottle
HI 93763B-0 Molybdovanadate Reagent 0.5 mL
1 bottle
*
Reagent Vial identification
:
P
,
white
cap.
Note
: Store the unused vials in their container in a cool and dark place.
REAGENT SET
HI 93763B-50
Reagents for up to 49 tests
For other accessories see page 77.
REQUIRED ACCESSORIES
C 9800-01
Hanna reactor (115 VAC)
C 9800-02
Hanna reactor (230 VAC)
HI 740216
test tube cooling rack (25 holes)
HI 740217
Laboratory bench safety shield
For other accessories see page 77.
MEASUREMENT PROCEDURE
Before starting to use the reagent kit it is recommended to read carefully
all the instructions and the Health & Safety Data Sheet
(HSDS). Pay particular attention to all warnings, cautions
and notes. Failure to do so may result in serious injury to
the operator.
Phosphorus, Total HR