colorimetric measurment principle

colorimetric measurment principle

In a colorimetric analysis process the ionic and other concentration in water is monitored by allowing a reagent to react against the target ions and others, and monitoring the transmissivity of the resultant coloration for light of a specific wavelength  →    a defined light source is activated to project light into the sample water

The Colormetry replaces this process by an electrical monitoring system and automates the entire process.
●    the analysis device measures the transmissivity of the resultant coloration for light of a specific wavelength 
●    it determines the ammount of sent out light which is absorbed by the couloured water sample
●    the unit detects colour-changes and the intensity of a colour; from such informationen the concentration of ions in water can be calculated

applications for colorimetric measurments
●    determination of hardness leackages in the effluent of water softeners with an indicator reacting selective with the ions calcium and magnesium
●    mearument of free chlorine concentration in water with an indicator reacting selective with the free chlorine ions

application of the colorimetric measurment principle in Colormetry divices

application of the colormetric measurment principle in Colormetry devices

determination of water hardness

determination of water hardness

The indicator reacts with Calcium and Magnesium ions forming a colour complex. Titration with colour change soft water   ► water sample is coloured BLUE hard water  ► water sample is coloured RED The unit is able to distinguish between BLUE and RED The unit detects the cholour change and the intensity of the colour The unit evaluates the hardness leackage e.g. in the effluent of water softeners Only one single indicator is necessary Limit values are adjustable in the device adjustable thesholds  [ mg CaCO3 / Liter] :   1 mg/L  0,05 °dH | 2 mg/L  0,10 °dH |  3 mg/L  0,15 °dH  | 5mg/L  0,25 °dH

monitoring of free chlorine

monitoring of free chlorine

The indicator reacts with Free Chlorine ions forming a colour complex Titration with extinction monitoring the more free chlorine in water the more intensive the water sample will be coloured the colour drives from LIGHT ORANGE  to  DARK ORANGE The unit evaluates the concentration  of free chlorine in water Only one single indicator is necessary over the measurment range 0-2 mg / Liter Limit values are adjustable in the device adjustable tesholds [ mg Cl- / Liter ] :   0,05 | 0,10 | 0,20 | 0,03 |  0,40 | 0,50 | 0,60 | 0,70 |  0,80 | 0,90 | 1,00 | 1,20 | 1,40 | 1,60 | 1,80 | 2,00 a high and a low threshold can be set