32
33
Chlorine Dioxide
• Press ZERO key. The meter will show “-0.0-” when the meter is zeroed and ready for measurement.
• Fill another cuvette with 10 mL of the reacted sample (#2) up to the mark and
replace the cap.
• Insert the sample into the instrument.
• Press READ and the meter will perform the reading. The instrument displays the results in mg/L of
chlorine dioxide.
SAMPLING PROCEDURE
It is recommended to analyze chlorine dioxide samples immediately after collection. Chlorine dioxide samples
must be stored in sealed dark glass bottle, with minimal head space. Excessive heat (above 25°C/78°F),
agitation and exposure to light must be avoided.
INTERFERENCES
Interferences may be caused by strong oxidants.
10 mL
#2
#2
Chlorine Dioxide
#1
• Add the content of one packet of HI 93738B-0 Dechlorinating Reagent to one of the two cylinders
(#1), close and invert it several times until it is totally dissolved. This is the blank.
• Add precisely 0.5 mL of HI 93738C-0 Chlorine Dioxide Reagent to each cylinder (#1 & #2), close them
and invert several times to mix.
• Add 0.5 mL of HI 93738D-0 Chlorine Dioxide Reagent to each cylinder (#1 & #2), close them and
invert several times to mix. Cylinder #2 is the reacted sample.
• Fill a cuvette with 10 mL of the blank (#1) up to the mark and replace
the cap.
• Place the blank (#1) into the holder and close the lid.
#1
#1
#1
#2
#2
#1
10 mL
#1 & #2
#1 & #2
