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NITRATE, HR,
5 minutes
7.
Set the cell down
and wait 5 minutes.
Note: Do not wait more
then 15 minutes before
completing Steps 8-12.
continued
8.
Fill a 10-mL cell
to the 10-mL line
with sample (the
blank).
50-27
9.
Place the blank in
the cell holder.
Note: In bright sunlight
it may be necessary to
close the cell
compartment cover.
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