815 ESTIMATED SOLUBLE SALTS BY ELECTRICAL CONDUCTIVITY
EC
Semi-quantifies the amount of soluble salts in H2O using the conductivity meter.
Summary: This method semi-quantifies the amounts of soluble salts in the water by measurement of the electrical conductivity (ECe) of the water sample. The higher the concentration of salt in a solution, the higher will be the electrical conductance (the reciprocal of resistance). Electrical conductivity is a function of quantity and specific types of cations and anions in the water. The method has a detection limit of approximately 0.01 dS/m. The analysis requires 10 mL of sample but 25 mL is requested to allow for quality control samples.
Method 2510 (Conductivity) in Standard Methods for the Examination of Water and Wastewater 20th Edition. Clesceri, L. S., Greenberg, A. E. and Eaton, A. D., eds. American Public Health Association; Washington D.C.; 1998; pp. 2-24 - 2-47.