Hach DR2400 - Page 666

Phosphorus, Total
Phosphorus, Total
Page 2 of 6
PhosphorusTot_TNT_Other_PAP_Eng_Ody.fm
5. Cap tightly and shake
to dissolve.
6. Place the vial into the
COD Reactor.
7. Touch the timer icon.
Touch
OK.
A 30-minute heating
period will begin.
8. When the timer
beeps, carefully remove
the hot vial from the
reactor. Place it in a test
tube rack and cool to
room temperature.
9. Use a TenSette Pipet
to add 2 mL of 1.54 N
Sodium Hydroxide
Standard Solution to the
vial. Cap and mix.
10. Wipe the outside of
the vial with a damp
cloth followed by a dry
one, to remove
fingerprints or other
marks.
11. Install the 16-mm
adapter.
Note: See Section 2.6 in the
Instrument Manual for
installation details.
Place the vial into the
adapter.
12. Touch Zero.
The display will show:
0.00 mg/L PO
4
3–
Zero