Hach-Lange BODTRAK II: Respirometric Biochemical Oxygen Demand (BOD) - Manual (Page 25)

BODTrak™ II procedures
25
1. Heat or cool the
sample to 19 to 21 ºC
(66 to 70 ºF).
2. Homogenize the
sample in a blender if it
contains large settleable
or floatable solids.
3. Choose the correct
sample size for the
sample range ( Table 6 on
page 24 ). Measure the
sample into a graduated
cylinder.
4. Add the contents of 1
nutrient buffer pillow to the
graduated cylinder.
5. If seeding the sample,
use a tensette pipet to add
the correct quantity of
seed to the graduated
cylinder ( Table 6 on page
24 ).
6. If necessary, add more
nutrient or buffer. Do not
add more than a total
volume of 50 mL (seed,
nutrient, buffer).