Hach BODTrak II - Page 31

BODTrak™ II procedures
31
4. When samples are seeded, calculate the results using this equation and the
corrected results:
Where:
A = corrected BOD of the seeded sample
B = corrected BOD of the seed blank
SA = volume of seed in sample (sample can also be GGA)
SB = volume of seed in seed blank
Example:
A= 290 mg/L BOD
B= 120 mg/L BOD
SA= 20 mL
SB= 110 mL
BOD mg/L = 268 mg/L
BOD mg/L()ABx
SA
SB
--------
⎝⎠
⎛⎞
–=
BOD mg/L()290mg/L 120mg/L x
20mL
110mL
-------------------
⎝⎠
⎛⎞
–=