Systea S.p.A.

Analytical Technologies

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Wednesday, 07 April 2010 08:27

Micromac Total N&P

On line analyzer for nitrogen and phosphorus
monitoring in surface and waste water
 

Micromac C TN&TP is designed to analyze Total Nitrogen and Total Phosphorus in the same device; UV digestion is applied for Total N, UV and high temperature digestion for Total P.

The measurement is performed in a combined mode, ensuring one hour of measurement for both parameters; 4-20 mA  data output is provided at the same time.

Measurement method 

The sample after proper filtration is pumped inside the LFA
reactor, where after injection of H2SO4 is trapped inside the
high temp heating bath for inorganic P hydrolysis. During
the hydrolysis time, the analyzer runs a complete TN test on
the same sample, by adding the oxidation reagents and
passing through a UV digestion step, to convert Nitrogen
into Nitrate by UV radiation in persulfate alkaline medium.
The nitrates formed are then reduced to nitrites by hydrazine
in alkaline solution, where copper is used as catalyst; the
nitrites react with sulphanilamide and
naphtylethylendiamine in acid solution, to form a pink
colored compound measurable at 550 nm.
The reactor is washed and then the analyzer opens the
heating bath and adds in the digested sample a proper
oxidant to convert all the organic forms of phosphorus into
orthophoshate, by the double action of potassium
persulphate and UV radiation in acid environment. The
orthophosphate formed reacts with molybdate to form
phosphomolybdate, which is finally reduced to blue
molybdenum by ascorbic acid. The coloured complex is
read at 660 or 880 nm.
The sample after proper filtration is pumped inside the LFA reactor, where after injection of H2SO4 is trapped inside the high temperature heating bath for inorganic P hydrolysis. During the hydrolysis time, the analyzer runs a complete TN test on the same sample, by adding the oxidation reagents and passing through a UV digestion step, to convert Nitrogen into Nitrate by UV radiation in persulfate alkaline medium. The nitrates formed are then reduced to nitrites by hydrazinein alkaline solution, where copper is used as catalyst; the nitrites react with sulphanilamide and naphtylethylendiamine in acid solution, to form a pink colored compound measurable at 550 nm. The reactor is washed and then the analyzer opens the heating bath and adds in the digested sample a proper oxidant to convert all the organic forms of phosphorus into orthophoshate, by the double action of potassium persulphate and UV radiation in acid environment. The orthophosphate formed reacts with molybdate to form phosphomolybdate, which is finally reduced to bluemolybdenum by ascorbic acid. The coloured complex is read at 660 or 880 nm.
 

Technical specification

  Total N Total P
Measuring principle Colorimetric, UV digestion + UV reduction to NO3 Colorimetric, acidic hydrolosis and UV digestion
Measuring range 0-5/10/20/50 mg/l as N  0-3/5/10 mg/l as P

 

Features and benefits

  • TN&TP measured in the same device
  • One hour analysis time for both parameters
  • Fully automatic operation
  • Long autonomy; low maintenance and operating cost
  • Low reagents consumption
  • Easy operation; plug in analyzer, no special training is required
  • Electronics and hydraulics separated
  • Serial interface for local or remote PC connection

The results of the analysis are displayed in the same moment, after 1 hour.

Published in On-line analyzers
Thursday, 08 April 2010 10:03

Micromac C

On line analyzer for potable, surface and waste water monitoring

MICROMAC C is a colorimetric microprocessor controlled On Line analyzer specifically designed for automatic monitoring on several type of waters matrix.

  • Robust and Reliable: designed for industrial and Environmental On Line applications ensures the highest level of robustness in the electronics, mechanics and hydraulics components. Complete separation between electronics and hydraulics plus a simple and robust LFA* hydraulics allows long and reliable operations.
  • Easy to install: the analyzer is delivered only after a long and successful series of final tests. It is ready for installation, without any further adjustment, and is complete of a spares set for start up. To start monitoring is enough to connect sample line, waste line and power supply.
  • Automatic Calibration: upon a user selectable Calibration Time expiring the analyzer perform a Calibration Cycle, storing and checking the new calibrant O. D. If new O.D. exceed selected limits, an alarm contacts is closed.
  • Sample dilution: each sample can be analyzed as it is or in dilution mode. Dilution mode can be activated also on off scale samples with a dilution factor, factory selected, up to 100.
  • Measuring interval: user selectable; between two measurements the analyzer remain in stand by mode, without reagents consumption.
  • Off scale reanalyze: The analyzer identify off scale samples, and starts the analysis in dilution mode automatically.

Features and benefits

  • Fully automatic operation;
  • Long autonomy; low maintenance, low operating cost;
  • Low reagents consumption; short preparation time; low disposable costs;
  • Easy operation; fully documented plug in analyzer, no special training is required;
  • Electronics and hydraulics completely separated;
  • Serial interface for PC or printer connection (optional).

 

AVAILABLE PARAMETERS 


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Published in On-line analyzers