ABSTRACT
Specific conductance measures a water's capacity to carry an electric current. This property is related to the total concentration of the ionized substances in the water and the temperature at which the measurement is made. Specific conductance is used to monitor the quality of deionized water. The amount of dissolved ionic matter in a sample can be estimated by multiplying the conductivity by some empirical factor. This chapter advises to run two blanks following a procedure using doubly deionized water (DDW) instead of a sample. The blanks help to correct for errors that result because filters are hygroscopic and may pick up or lose water from the air. The chapter also discusses the measure of the "settling qualities" of suspended solids and measures the portion of material that settles within 1 hr. It also includes the material that floats to the surface.
