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Water: Monitoring & Assessment

Table 5.2

Method Location
(Lab or Field)
Comments Table 5.2

Summary of chemical monitoring methods
Volunteers can measure some parameters in the field or in the laboratory.
Dissolved Oxygen (DO)
Winkler with eye dropper Either If lab, the sample is fixed in field and titrated in lab; must be measured within 8 hours of collection.
Winkler with digital titrator or buret Either
Meter Field The meter is fragile and must be handled carefully.
Biochemical Oxygen Demand (BOD)
Winkler with eye dropper 1st part - Either
2nd part - Lab
If lab, the sample is fixed in field and titrated in lab; must be measured within 6 hours of collection.
Winkler with digital titrator or buret 1st part - Either
2nd part - Lab
If lab, the sample is fixed in field and titrated in lab; must be measured within 6 hours of collection.
Meter 1st part - Either
2nd part - Lab
The meter is fragile and must be handled carefully; must be measured within 6 hours of collection.
Temperature
Thermometer Field Cannot be done in the lab.
pH
Color comparator Either If lab, measured ASAP within 2 hours of collection.
pH "Pocket Pal" Either If lab, measured ASAP within 2 hours of collection.
Meter Either If lab, measured ASAP within 2 hours of collection.
Turbidity
Meter Either If lab, measured ASAP within 24 hours of collection.
Total Orthophosphate
Ascorbic Acid w/ color comparator Either If lab, measured within 48 hours of collection.
Ascorbic acid w/ spectophotometer Either If lab, measured within 48 hours of collection.
Nitrate
Cadmium reduction w/ color comparator Either If lab, measured within 48 hours of collection.
Cadmium reduction w/ spectrophotometer Either If lab, measured within 48 hours of collection.
Total Solids
Oven drying/weighing Lab Must be measured within 7 days of collection.
Conductivity
Meter Either If lab, measured ASAP within 28 days of collection.
Total Alkalinity
Titration Either If lab, measured within 24 hours of collection.
Fecal Bacteria
Membrane filtration Lab Must be measured within 6 hours of collection.

 


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