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Phosphates PO43-

Applications

  • Power Utility
  • Cooling water
  • Drinking water
  • Boiler feedwater
  • Industrial and municipal wastewater
  • Surface water

Description

 The JAL-Z colorimeter is a compact analytical instrumentation for online analysis and process monitoring. The colorimeter is based on a color-developing chemical reaction carried out inside the analyzer's glass cell. The sample, coming from an external reservoir or process stream is autonomously grabbed by the instrument and mixed with the appropriate reagents to make the reaction happen. The analyzer uses an LED light source and a photodiode to photometrically measure the developed color intensity (absorbance). The absorbance is proportional to the concentration of the target chemical species (analite). 

Features

  •  Low reagents consumption and analytical reliability thanks to our custom designed miniature peristaltic pumps
  • Dual compartment design to guarantee a complete separation between the electronics and the hydraulic section
  • Color touchscreen to show the last measured value clearly, and to set all the options and settings via an user friendly interface
  • Datalogger function with data history in graphical form and USB download
  • Automatic calibration, validation and cleaning to reduce down time and operator intervention, their frequency can be freely set by the user
  • Fully integrable in industrial automation via the analog outputs (2 x 4-20 mA channels), digital output (2 relays + ModbusRTU) and digital input (voltage free contact)

     The determination ranges of the phosphate analyzer vary from trace μg/L to 2000 mg/L PO43- using the (optional) internal dilution module. Ranges also depend on the method used. 

METHOD

Phosphates Blue

  Molybdate reacts in acid medium with orthophosphate to form phosphomolybdic acid, which is then reduced to intensely colored molybdenum blue. The absorbance intensity is proportional to the phosphate concentration in the sample and is determined at 850 nm. 

Features

Measured parameter:      PO43-    

Range :

(Ø 26 mm)              0.01 - 4 ppm P-PO4 (12.5 ppm PO4) 

(Ø 16 mm)              0.05 - 10 ppm P-PO4 (30 ppm PO4)   

(with dilution)     2 - 400 ppm P-PO4 (1200 ppm PO4)    

 Reproducibility*

(Ø 26 mm)             ± 5 ppb / ± 5%  

(Ø 16 mm)             ± 10 ppb / ± 5%    

* if two values take whichever is greater

Limit of detection :     0.01 ppm P-PO4    

Wavelength :     850 nm   

Demineralized water : Not required 

Interferences :    Cu(II) (> 10 mg/L) Fe(III) (> 50 mg/L), arseniates, silica (> 20 mg/L)

Reference :   ISO 6878:2004  

Number of reagents: 2

Min. analysis time : 9 minutes

Default analysis time : 15 minutes

Reagent consumption**

(Ø 26 mm)     1.5 L 

(Ø 16 mm)     1 L 

** per month, at the default analysis frequency.

Phosphates Yellow

   Molybdate reacts in acid medium with orthophosphate to form phosphomolybdic acid, which is then reduced to intensely colored molybdenum blue. The absorbance intensity is proportional to the phosphate concentration in the sample and is determined at 850 nm. 

Features

Measured parameter:      PO43-      

Range :

(Ø 26 mm)               0.05 - 10 ppm P-PO4 (30 ppm PO4) 

(Ø 16 mm)               0.1 - 16 ppm P-PO4 (50 ppm PO4    

(with dilution)      4 - 640 ppm P-PO4 (2000 ppm PO4)  

 Reproducibility*

(Ø 26 mm)             ± 200 ppb / ± 5%   

(Ø 16 mm)             ± 500 ppb / ± 5%     

* if two values take whichever is greater

Limit of detection :     0.05 ppm P-PO4    

Wavelength :      430 nm    

Demineralized water : Not required  

Number of reagents: 1

Min. analysis time : 9 minutes

Default analysis time : 15 minutes

Reagent consumption**

(Ø 26 mm)     2.5 L 

(Ø 16 mm)     1 L 

** per month, at the default analysis frequency.

Downloads

JAL-Z_Chlorine-Colorimeter-Datasheet (pdf)

Download

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