Formaldehyde CH2O

• Paper and wood industry
• Textile
• Productions of resins and adhesives
• Chemical industry

 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)

  Colorimetric analyzer for the determination of formaldehyde 

  An excess of MTBH (3-methyl-2-benzothiazoline hydrazone) is added to the sample. The reaction between the compound and formaldehyde leads to the formation of an azine. The subsequent addition of the developing solution oxidizes the excess MTBH, the resulting compound reacts with the azine to form a conjugate system which absorb in the red region of the spectrum. The absorbance is proportional to the formaldehyde concentration and it is measured at 660 nm. 

Measured parameter:    CH2O   

Range : 

(Ø 16 mm)             0 - 2 ppm   

Wavelength :     660 nm   

Demineralized water : Not required  

Number of reagents: 2

Min. analysis time : 18 minutes

Default analysis time : 30 minutes