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COMPOSER Matthias G. Monn - SEIBOLD Online-Analyser for Cyanide
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- Properties and typical applications
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Bild vergrößern
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- Toxicology
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- Method
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- Application information
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- Technical information
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- Downloads
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- Matthias G. Monn
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Properties and typical application
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Any chemical compound containing the cyano group -C=N with the carbon atom
triple-bonded to the nitrogen atom is a cyanide (CN). The cyano-group can be found
in various kinds of gaseous, liquid and solid compounds.
All cyanides able to release the cyanide ion CN- are highly poisonous and in
nature are produced by certain bacteria, fungi and algae. Further, cyanide is
readily introduced into organic molecules by displacement of the corresponding
organic halide during industrial processes.
Typical fields of business encountering cyanide are the steel industry, gold
and silver mining, production of tints and varnish, synthetic resins, synthetic
fibres, electroplating, coal and crude oil production.
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Toxicology
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For cyanide the guideline value for chemicals that are of health siginificance
in drinking water according to
World Health Organisation
is 0.07 mg/litre as total cyanogenic compounds.
Similar to hydrocyanic acid, cyanides are extremely toxic as a consequence of
being able, even with very weak acids (e.g. water), to protonate and build
hydrogen cyanide (HCN). HCN and cyanide build a complex with the ferrous atom.
If this complex is built with the ferrous atom of the red blood pigment
(haemoglobin) the transport of oxygen to cells is being avoided. As a
consequence, respiration, for example, may arrest.
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Method
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The measuring principle is based on the employment of an ion selective
electrode (ISE).
The specific ion selective electrode is a highly sensitive single-rod measuring
cell with an integrated reference electrode. The measuring surface is made up
of a selective coating, providing adsorption of cyanide ions and dissolving
silver ions. The potential of the electrode is influenced according to the
change of the concentration of cyanide and measured against the potential of
the reference electrode.
A specific reagent is added to the sample for adjusting the ionic strength of
the liquid to be measured. The measuring procedure varies for different
applications and can be decided on the concentration of cyanide and interfering
ions.
For analysis of potable water and water with low concentration of interfering
ions, we strongly recommend using automated calibration.
For analysis with high concentration of interfering ions and possible organic
products of decomposition we further recommend using the option of
„Known Addition“.
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Application information
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Measuring range
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0.01 - 2.0 mg/l CN-
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Resolution
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0.01
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Accuracy
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+/- 2% (based on full scale)
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Measuring interval
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Continuous
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Discontinuous/programmable
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External start
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Measuring method
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Ion selective electrode (ISE)
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Reagents
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2 (Cyanide standard solution, Ionic strength adjustor)
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Calibration
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Automated
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Cleaning
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Automated
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Interferences
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Ni, Cd, Cu, Cl, I, Br, S (widely bypassed by using Known Addition)
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Interfering ions can be masked in local applications or
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are widely bypassed by using Known Addition.
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Technical information
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Power supply
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230 VAC, 50 Hz (110 VAC optional)
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Current consumption
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Max. 50 VA
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Switch contacts
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2 x P-controlled (min, max)
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1 x alarm contact
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Analogue output
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4..20 mA
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Digital output
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RS232 C
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Options: Interbus-S, Profibus, CAN
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Cabinet size
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746 x 600 x 373 mm (HxBxD)
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Weight
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App. 80 kg
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Environmental temperature
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+15°C .. +35°C
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Humidity
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Max. 70% RH, no condensation
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Sample pressure
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0 .. 0.5 bar
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Sample inlet
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6/4 mm hose
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Sample drain
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Unpressurised, free falling, 6/4 mm hose
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Downloads
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DataSheet COMPOSER Matthias G. Monn - SEIBOLD Online-Analyser for cyanide (english)
Datenblatt COMPOSER Matthias G. Monn - SEIBOLD Online-Analysator für Cyanid (deutsch)
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Matthias G. Monn
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Matthias Georg Monn was born in Vienna in 1717.Monn was a famous composer and
organist. He was playing the organ at Wiener Karlskirche an composed 16 symphonies
and various solo concerts besides church and chamber music. Together with Johann
Georg Albrechtsberger he paved the way for Viennese Classicism. Matthias G. Monn
died 1750 in Vienna at the age of only 33 years.
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SEIBOLD-Messtechnik und Projektentwicklug GmbH, A-1110 Wien, Grillgasse 51
Tel +43 1 332 00 60, Fax +43 1 332 00 60 44,
office@seiboldme.com
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