Measure nitrate using an electrode
method - 0 to 50 ppm
NITRATE
One of the accepted methods for the
measurement of nitrate is an electrode
method. The advantages of using an ion
selective electrode are:
TYTRONICS'® SENTINEL ISE
Tytronics'® Sentinel ISE is an on-line
analyzer that measures nitrate using an ion
selective electrode. The instrument uses a
batch sampling technique that allows the use
of 0.25” tubing for sample and reagent lines
so small amounts of solids will not affect
instrument performance.
Other advantages of batch sampling are:
Analytical results are not affected by
sample and reagent flows
Analyses are only performed as
frequently as required, minimizing
reagent consumption
ANALYSIS
The Tytronics'® Sentinel ISE uses a known
addition measurement technique. Known
addition provides faster and more consistent
results than a direct electrode measurement.
In the instrument, 20 ml of sample is
captured, Ionic Strength Adjuster (ISA) is
added, and then an aliquot of standard is
added to the sample. From the change in
potential before and after the addition, the
original sample concentration is determined.
METHOD
The advantage of the known addition
technique is that electrode drift will not
affect the instrument results. Electrode
slope is automatically determined by using a
standard of known concentration and
performing a single known addition on the
standard. Instrument accuracy is insured
through the use of the known addition
technique (SKA) and automatic slope
determination.
FEATURES:
Duplicates, on-line, the laboratory
method (ISE electrode)
Utilizes single known addition technique
so results are not affected by electrode
drift
Automatic slope calibration
User adjustable
Use our Tytronics Sentinel for measuring nitrate
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