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Oxygen Demand, Chemical
5.
Cap and invert
several times to mix.
9.
Remove the vials
from the water and wipe
with a clean, dry paper
towel.
13.
Place the sample into
the cell holder.
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Page 2 of 2
6.
Place the vials in the
preheated COD Reactor.
Digest for 1 hour.
You may digest more
resistant organics and the
blank for up to four hours.
10.
Invert the vials
several times to mix.
Read
14.
Touch
Read.
Results will appear in
mg/L COD Mn.
Call
toll-free
800-227-4224
Contact the HACH office or distributor serving you.
www.hach.com
; E-mail –
techhelp@hach.com
7.
Remove the vials and
place them in a cooling
rack for two minutes.
Note: If a vial develops a
colorless upper layer and a
purple lower layer, invert the
vial several times to mix and
proceed.
11.
Install the 16-mm
adapter.
Place the blank into the
adapter.
OxygenCOD_Other_Other_MN3_Eng_Ody.fm
8.
Cool the vials to room
temperature in a cool
water bath or with
running tap water. This
takes several minutes.
Zero
12.
Touch
.
Zero
The display will show:
0 mg/L COD Mn
HACH COMPANY
WORLD HEADQUARTERS
Telephone: (970) 669-3050
FAX: (970) 669-2932
3/04 1ed
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