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DR/2400
Method 10129
Scope and Application:
* U.S. Patent 6,368,870
Tips and Techniques
• Place a safety shield in front of the COD reactor to prevent injury if splattering occurs.
• A reagent blank is required for each series of samples.
• Wipe the outside of sample cells before each insertion into the instrument cell holder. Use a damp towel followed by a dry one to
remove fingerprints or other marks.
1.
Turn on the COD
reactor.
Heat to 103–105 °C.
OrganicCarbonTotal_Other_Low_DIR_Eng_Ody.fm
For water, drinking water, and wastewater
2.
Use a graduated
cylinder to add 10 mL of
sample to a 50-mL
Erlenmeyer flask that
contains a stir bar.
Organic Carbon, Total
3.
Add 0.4 mL of Buffer
Solution, pH 2.0. Use pH
paper to make sure the
sample pH is 2.
Direct Method*
LR (0.3 to 20.0 mg/L C)
Method 10129
HRS MIN SEC
HRS MIN SEC
4.
Place the flask on a
stir plate and stir at a
moderate speed for
10 minutes.
Organic Carbon, Total
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