Chlorine, Total
Chlorine, Total
Page 2 of 10
ChlorineTot_PT2_ULow_DPD_Eng_Ody.fm
5. Break open one ULR
Chlorine Buffer Solution
Ampule.
6. Using a TenSette
®
Pipet and a clean tip,
transfer 1.0 mL of buffer
from the ampule to a
clean, treated 50-mL
graduated mixing
cylinder.
7. Break open one
ampule of DPD Indicator
Solution for Ultra Low
Range Chlorine.
8. Using a TenSette
®
Pipet and a clean tip,
transfer 1.0 mL of
indicator from the
ampule to the graduated
mixing cylinder. Swirl to
mix.
Proceed to step 9 within
one minute.
9. Avoiding extra
agitation, carefully fill the
cylinder to the 50-mL
mark with sample.
Stopper the cylinder.
Gently invert it twice to
mix. This is the prepared
sample.
10. Touch the timer icon.
Touch
OK.
A three-minute reaction
time will begin. Perform
steps 11–16 during this
period.
Measure the reacted
sample 3–6 minutes after
mixing the sample and
reagents. If less than three
minutes elapses, the
reaction with chloramines
may be incomplete. A
reading after six minutes
may result in higher
reagent blank values.
11. Push the valve button
the OriFlo
™
barrel
assembly to the “closed”
position. Place the barrel
assembly into its stand.
Pour approximately
50 mL of the original
sample into the barrel.
The lower ring on the
barrel assembly
represents about a 50-mL
volume.
12. Insert the plunger
into the barrel and slowly
push the plunger down
with even pressure, until
the plunger is fully
seated.
50 mL
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