Salinity can be measured using electrical conductivity meter. We can estimate TDS from conductivity. yet in presence of large amounts of non-conductive substances (e.g. organic compounds) the estimated value will significantly deviate from the actual one.
THANK YOU FOR YOUR ANSWER,BUT I CAN NOT UNDERSTAND THIS ARTICLE THAT CONDUCTIVITYMETER MEASUREMENT CONDUCTIVITY ALL OF COMPOUND THAT IONIZED IN WATER THAT ALL OF SALT COMPOUND(NOT ORGANIC COMPOUND).IN THIS CASE SALINITY SHOULD BE SAME WITH CONDUDUCTIVITY (TDS APPROXIMATE 0.7 CONDUCT)?IN OTHER HAND IF SALINITY IS FROM Na+,Cl-,...condutivity IS EQUAL CALCULATED FROM THIS ION THEN TDS=0.7 COND.?CAN EXPLAIN ME MORE ABOUT IT?