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Phosphorus, Total
5.
Use a funnel to add
the contents of one
Potassium Persulfate
Powder Pillow for
Phosphonate to each vial.
Cap tightly and shake to
dissolve.
9.
Use a TenSette Pipet
to add 2.0 mL of 1.54 N
sodium hydroxide to
each vial.
Cap and invert to mix.
Phosphorus, Total
Page 2 of 6
6.
Place the vials in the
COD Reactor.
10.
Use a polyethylene
dropper to add 0.5 mL of
Molybdovanadate
Reagent to each vial.
Cap and invert to mix.
7.
Touch the timer icon.
Touch
.
OK
A 30-minute heating
period will begin.
11.
Touch the timer icon.
Touch
.
OK
A 7-minute reaction
period will begin.
Read the sample within
seven to nine minutes
after adding the
Molybdovanadate
Reagent.
PhosphorusTot_TNT_High_MOL_Eng_Ody.fm
8.
After the timer beeps,
carefully remove the hot
vials from the reactor.
Place them in a test tube
rack and allow to cool to
room temperature
(18–25 °C).
12.
Wipe the vials with a
damp towel, followed by
a dry one, to remove
fingerprints or other
marks.
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