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
Wednesday, 31 March 2010 14:37

Micromac Cfa

On-line analyzers for complex chemical parameters
monitoring in water and waste water

 

Batch Continuous Flow Analysis (BCFA) hydraulics was recently applied to measure specific chemical parameters which needs a particular sample conditioning:  

  • Lead and Cadmium, to be measured as free or Total ions
  • Cyanide, either as free or Total ions 
  • volatile Phenols.

MICROMAC Cfa is a microprocessor controlled On Line analyzer specifically designed for automatic monitoring of complex chemical compounds on several type of water matrices.

Robust and Reliable
Designed for industrial and environmental On Line applications, Micromac C ensures the highest level of reliability in the electronics, mechanics and hydraulics components.
Complete separation between electronics and hydraulics plus a simple and robust CFA hydraulics allows long term and reliable operations.
 
Easy to install
The analyzer is delivered after a long and successful series of factory tests. It is ready for installation, without any further adjustment; it is provided completed with a spare set for start up. To start monitoring activity, Customer needs only to connect sample line, waste line and power supply and to insert reagents and calibrant into the internal compartment.
 
Automatic Calibration
As soon as user selectable Calibration Time expires, the analyzer perform a calibration cycle, storing and checking the new calibrant O. D. If new O.D. exceeds the selected limits, an alarm contact is closed.
  
Sample dilution
Water sample can be analyzed as it is or after automatic dilution. Automatic dilution can be factory adjusted for high range applications.
 
Measuring interval
User selectable; between two measurements the analyzer remains in stand by mode, without reagents consumption
 
Features and benefits
  • Fully automatic operation
  • Built-in sample pretreatment, including in-line distillation
  • Long autonomy; low maintenance, low operating cost
  • Easy operation; plug in analyzer, no special training is required
  • Electronics and hydraulics completely separated
  • Serial interface for local o remote PC connection.
Published in On-line analyzers