Calibration
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TARAtec 9/10
Measured variables
Recommended analytical methods
Chlorine dioxide
DPD-1
Photometer for chlorine
dioxide
Ozone
DPD-1 + DPD-3
Photometer for ozone
DPD-4
Hydrogen peroxide
Single-stage sulphuric acid titration with
potassium permanganate (for the procedure
see appendix)
Peracetic acid
Two-stage sulphuric acid titration with
potassium permanganate and sodium
thiosulphate (for the procedure see appendix)
Chlorine
DPD-1
Up to 10 ppm:
Photometer for chlorine
Iodometry
Up to 200 ppm:
Photometer for chlorine
Up to 2000 ppm
titration with sodium
thiosulphate
Tab. 4: Recommended analytical methods
Chlorine dioxide can also be determined using a photometer
intended for chlorine. The result must be multiplied by a factor of
1.9.
Ozone can also be determined using a photometer intended for
chlorine. The result must be multiplied by a factor of 0.68.
At higher concentrations of disinfectant the DPD colouration may fail
to appear.
