1—22
Chlorine, Free and Total, LR, continued
4.Press ZERO/SCROLL.
The display will show
“- - - -” then “0.00”.
Remove the blank from
the cell holder.
5.Fill a second 10-mL cell
to the 10-mL line with
sample.
Note: Do not use the same
sample cells for free and
total chlorine analysis
without thoroughly rinsing
the cells with sample
between free and total
tests.
6.Add the contents of one
DPD Free Chlorine Powder
Pillow or one DPD Total
Chlorine Powder Pillow to
the sample cell (the
prepared sample).
Note: SwifTest™
Dispensers for Free or
Total Chlorine can be used
in place of powder pillows.
See Using the SwifTest™
Dispenser (USEPA
accepted for reporting) on
page 1—28.
5957088.book Page 22 Friday, March 22, 2013 3:54 PM
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