Hach DR2400 - Page 534

Organic Carbon, Total
Organic Carbon, Total
Page 2 of 6
OrganicCarbonTotal_Other_Mid_DIR_Eng_Ody.fm
5. Label two Mid Range
Acid Digestion vials
sample and reagent blank.
6. Use a funnel to add
the contents of one TOC
Persulfate Powder Pillow
to each Acid Digestion
vial (colorless liquid).
7. Use a TenSette
®
Pipet
to add 1.0 mL of
organic-free water to the
reagent blank vial and
1.0 mL of prepared
sample to the sample
vial. Swirl to mix.
8. Rinse two blue
Indicator Ampules with
deionized water and
wipe them with a soft,
lint-free wipe.
Do not touch the
ampules sides after
wiping. Pick them up by
the top.
9. Lower one unopened
ampule into each Acid
Digestion vial. When the
score mark on the ampule
is level with the top of the
Acid Digestion vial, snap
the top off the ampule
and allow it to drop into
the Acid Digestion vial.
Do not invert or tilt the
vial after inserting the
ampule.
10. Cap the vial
assemblies tightly and
place them in the COD
reactor for 2 hours
at 103–105 °C.
11. Carefully remove the
vial assemblies from the
reactor. Place them in a
test tube rack.
Allow the vials to cool for
one hour for accurate
results.
12. Touch
Hach Programs.
Select program
425 Organic Carbon MR.
Touch
Start.
Hach Programs