Answer to Question #41585 in Chemistry for EDWARD

Question #41585
DEAR SIR
I HAVE AQUESTION ABOUT WATER CHEMISTRY.WHAT IS DIFFERENT BETWEEN TDS (TOTAL DISSOLVE SOLID)AND SALINITY?
BEST REGARDS
EDWARD
1
Expert's answer
2014-04-28T13:03:08-0400
Total dissolved solid (TDS) is a measure of the combined content of all inorganic and organic substances contained in a liquid in molecular, ionized or micro-granular (colloidal sol) suspended form.
Salinity is the saltiness or dissolved salt content of water.
So, salinity is part of total dissolved solids.
Total dissolved solids are normally discussed only for freshwater systems, as salinity includes some of the ions constituting the definition of TDS.

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Comments

Assignment Expert
01.05.14, 15:00

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.

TONE
29.04.14, 07:38

DEAR SIR 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?

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