Principles Of Operation - Thermo Scientific Orion 8010cX User Manual

Principles of Operation

Ammonia nitrogen refers to nitrogen existing in the form of
free ammonia (NH ) and ammonium ions (NH +) in water. It is
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a very important indicator for detecting and controlling the
environmental water quality of drinking water, surface water,
municipal sewage, industrial sewage, etc. It is also an
important water quality parameter for water quality detection.
Orion 8010cX Ammonia Analyzer is based on the Salicylate
Colorimetric method. In this measurement technique:
Ammonium reacts with salicylate and hypochlorite ions in the
presence of alkaline condition and catalysts to generate a
blue-green compound. The light absorbed by the blue
complex at a specific wavelength is proportional to the
ammonia nitrogen content. After calibration, the ammonia
nitrogen concentration (unit: mg/L) in the unknown water
sample can be detected.
Metal ions such as calcium, magnesium and iron in water,
sulfides, available chlorine, aldehydes and ketones, pH, color,
and turbidity could interfere with the measurement of
ammonia.
When primary amine exists in water, the test result will be on
the higher side. When water contains reducing substances,
the test result will be on the lower side.
Orion 8010cX Ammonia Analyzer includes the following
systems:
1.Electrical Control System
2.Water Sample Analysis System
The Electrical Control System includes the power supply
module, measurement interface drive panel, and main control
panel, and has the functions of instrument power-on self-test
and fault alarm. Measurement data can be stored; the user
can download data or upgrade the instrument program
through U-disk. The test data can also be transmitted to
external equipment through 0/4 - 20 mA current output or
digital communication (MODBUS or Profibus), and the user
can set the measurement time, measurement frequency, etc.
according to the requirements of measurement.
The Water Sample Analysis System includes the units of
water samples and reagents injection, color reaction, and
measurement analysis. Water samples and reagents are
injected by an injection pump to ensure a higher injection
accuracy. The instrument has implemented an accurate
temperature control on the color reaction process to ensure
completion of the reaction.
8 | Product Overview Orion 8010cX Ammonia Analyzer