Hach DR/700 Procedures Manual page 710

PHOSPHORUS, TOTAL,
16.
Remove the vial
from the instrument.
Remove the cap from
the vial.
2 minutes
19.
Wait 2 minutes.
Read sample between
2 and 8 minutes.
continued
17.
Using a funnel,
add the contents of
one PhosVer 3
Phosphate Reagent
Powder Pilow for
10-mL samples
Powder Pillow to the
vial.
20.
Clean the
outside of the sample
vial with a towel.
Place the prepared
sample into the
adapter with the Hach
logo facing the front
of the instrument.
Note: Wiping with a
damp towel, followed by
a dry one, will remove
fingerprints or other
marks.
81-36
18.
Cap tightly and
shake for 10-15
seconds.
Note: The powder will
not dissolve completely.
21.
Press:
READ
The display will
count down to 0.
Then the display will
show the results in
mg/L PO .
4