18
f
i
l
t
e
r
d
i
s
c
• Mix well using the spoon
and then wait for 5
minutes.
• Unscrew the filter assembly,
put a filter disc inside and
close it again.
• Connect the filter assembly
to the 60 mL syringe by
the screw rim.
• Take off the syringe
plunger and fill the syringe
with the sample to be
filtered. Pour the sample
gently, trying to avoid
transferring of the actived
carbon to the syringe.
• Reinsert the plunger and
filter the solution into the
100mL beaker by pushing
gently the syringe plunger.
The sample is now ready.
Note: Filter at least 40 mL of solution if all the four parameters
have to be tested. If the solution is still turbid or colored, treat it
again with a packet of active carbon. After use, throw the filter
disc away and wash the syringe and the filter assembly well.
Always use a new disc for another sample.
NUTRIENTS SOLUTION (MR):
• Use the graduated cylinder to measure exactly 20 mL
of sample.
35
SPECIFICATIONS
Range
0.0 to 50.0 mg/L
Resolution
0.5 mg/L
Accuracy
±2.5 mg/L ±4% of reading
Typical EMC Dev.
±0.5 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 be-
tween phosphorus and reagents causes a blue
tint in the sample.
REQUIRED REAGENTS
Code
Description
Quantity
HI 93706
A
-0
Molybdate
10 drops
HI 93706
B
-0
Amino Acid Powder
1 packet
REAGENT SETS
HI 93706-01
Reagents for 100 tests
HI 93706-03
Reagents for 300 tests
For other accessories see page 48.
MEASUREMENT PROCEDURE
• Select the program number corresponding to Phosphorus MR on
the secondary LCD by pressing PROGRAM
t
and
s
.
• Fill the cuvet with 10 mL of unreacted
sample (up to the mark) and replace
the cap.
• Place the cuvet into the holder and
ensure that the notch on the cap is
positioned securely into the groove.
• Press ZERO and “SIP” will blink on
the display.
Note: for sample preparation follow the NUTRIENTS SOLUTION (MR)
procedure at page 18.
PHOSPHORUS MEDIUM RANGE
1
0
m
L
Phosphorus MR
