Nitrates NO3-

• Drinking water
• Process optimisation of wastewater treatment plants
• Industrial and municipal wastewater
• Mineral water monitoring
• Surface water

 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). 

•  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 instrument is ideal for potable water or suface water analysis and with the addition of a dilution module is also capable of the determination of nitrates in complex matrices such as urban and industrial wastewaters.
The determination ranges of the nitrate analyzer vary from trace μg/L to 25.0 mg/L N-NO3 (80 mg/L NO3) using the (optional) internal dilution module. The result can be expressed as NO3 or N-NO3. 

  Both hydrazine and copper catalyst reagents are used to reduce Nitrate to Nitrite in a basic medium inside a heated reaction cell. A sulfanilamide and N-(1-naphthyl)-ethylene diammonium dichloride reagent is added to react with the Nitrite to form a purple colored compound. The absorbance intensity is proportional to the Nitrite concentration in the sample and is measured at 525 nm 

Measured parameter:     NO3-   

Range :

(Ø 26 mm)             2 - 400 ppb N-NO3 (1.28 ppm NO3)  

(Ø 16 mm)             4 - 650 ppb N-NO3 (2.08 ppm NO3)  

(with dilution)    25 ppm N-NO3 (80 ppm NO3)   

 Reproducibility*

(Ø 26 mm)            ± 2 ppb / ± 5% 

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

* if two values take whichever is greater

Limit of detection :    2 ppb   

Wavelength :    525 nm  

Demineralized water : Not required 

Termoregulation :  37 °C 

Interferences :   Amines, urea, iodides.

Reference :   DIN EN 26 777   

Number of reagents: 3

Min. analysis time : 11 minutes

Default analysis time : 20 minutes

Reagent consumption**

(Ø 16 mm)     4 L 

** per month, at the default analysis frequency.