Quality of water and water chemical analysis

Components of natural water
        - pH
        - total hardness
        - oxygen
        - BOD
        - conductivity
        - NO3^-; NO2^-; PO4^3-

Rapid test types
        - test strips
        - titrimetry
        - colorimetry
        - spectrophotometry

Advantages and disadvantages of rapid tests
        - sensitivity
        - precision
        - mobility