L1 /
14
CH3041
WATER QUALITY
• Salinity : freshwater < 1, oceans 32 - 37 ppt, part-per-thousand inorganic mass g/kg
of H2O
• Dissolved Oxygen content (DO) mg /L
indirectly determines if aerobic (using O2) or
anaerobic (not using O2) organisms exist.
indirectly determines if aerobic (using O2) or
anaerobic (not using O2) organisms exist.
8.24 mg /L
DO for water saturated with O2,25oC
• A measurement of
the dissolved oxygen
content is made either titrimetrically (Winkler method) or with DO probes.
content is made either titrimetrically (Winkler method) or with DO probes.
• Temperature: field probe oC,
influences DO
higher T Þ lower DO.
higher T Þ lower DO.
