20
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sample with the syringe, push the plunger completely into the
syringe and insert the tip into the sample. Pull the plunger out
until the lower edge of the seal is on the 5 mL mark of the
syringe.
• Remove the cap and fill the
Demineralizer Bottle with tap
water.
• Replace the cap and shake gently
for at least 2 minutes.
• Open the upper part of the
Demineralizer Bottle cap and squirt
gently the demineralized water into
the cylinder, up to the 100 mL
mark.
• Pour the solution in the large
170mL beaker, replace the cap
and invert several times to mix.
• If the solution contains some turbidity or color, add a powder
packet of active carbon and follow the procedure described for
Irrigation Water
.
33
SPECIFICATIONS
Range
0.0 to 10.0 mg/L
Resolution
0.1 mg/L
Accuracy
±0.5 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 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
Note: for sample preparation follow the IRRIGATION WATER (LR)
procedure at page 17.
• Select the program number corresponding to Phosphorus LR 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.
Phosphorus LR
PHOSPHORUS LOW RANGE
1
0
m
L
