28
SPECIFICATIONS
Range
0.0 to 30.0 mg/L NO
3
--N
Resolution
0.1 mg/L
Accuracy
±1.0 mg/L or ±5 % of reading @ 25 °C, whichever is greater
Light Source
Tungsten lamp with narrow band interference filter @ 420 nm
Method
Chromotropic acid method. The reaction between nitrate and the reagents causes a
yellow tint in the sample.
REQUIRED REAGENTS
Code
Description
Q.ty/test
Q.ty/set
HI 93766V-0*
Reagent Vial
1 vial
50 vials
HI 93766-0
Nitrate Reagent
1 packet
50 packets
*
Reagent Vial identification:
N
, white label.
Note
: Store the unused vials in a cool and dark place.
REAGENT SET
HI 93766-50
Reagents for 50 tests
For other accessories see page 68.
MEASUREMENT PROCEDURE
Before using the reagent kit carefully read all the instructions and the Material Safety Data Sheet
(MSDS). Pay particular attention to all warnings, cautions and notes. Failure to do so may result
in serious injury to the operator.
• Select the
Nitrate
method following one of the procedures described in the “Method Selection” section
(see page 15).
• Remove the cap from a Reagent Vial.
• Add exactly 1.0 mL of sample to the vial, while keeping the
vial at a 45-degree angle.
• Replace the cap tightly and invert the vial 10 times. This is the blank.
Warning
: The vial will become hot during mixing, be careful when handling it.
Note
: The method is technique sensitive: to obtain reproducible results it is
strongly recommended to follow carefully the “invert” procedure
described on page 10.
•
Place the vial into the holder and push it completely down.
NITRATE
Nitrate