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Glossary:Total dissolved solids (TDS)
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- Total dissolved solids in a quantity of liquid.
- Mineral material suspended or dissolved in solution which passes a standard glass filter and 0.45 1-1m filter and does not evaporate below 180° C. TDS is generally used as a gross indicator of the mass of dissolved salts in a solution, but the analytical method is subject to interferences from colloidal material.