
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).
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.
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.
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.
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.
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.
JAL-Z_Chlorine-Colorimeter-Datasheet (pdf)
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