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RProgrammer (talk | contribs) →Measurement: Typo; it said gravimetric when it meant conductivity. The surrounding text above and below right here alone shows the correct meaning by context, so no need for a citation: conductivity is only applicable to measuring ionic solids (salts). |
ElementSix (talk | contribs) m fixed ref error |
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:''TDS = k<sub>e</sub>EC''
where TDS is expressed in mg/L and EC is the electrical conductivity in microsiemens per centimeter at 25 °C. The conversion factor ''k<sub>e</sub>'' varies between 0.55 and 0.8.<ref>{{cite journal |last1=Atekwanaa |first1=Eliot A. |last2=Atekwanaa |first2=Estella A. |last3=Roweb |first3=Rebecca S. |last4=Werkema Jr. |first4=D. Dale |last5=Legalld |first5=Franklyn D. |date=2004 |title=The relationship of total dissolved solids measurements to bulk electrical conductivity in an aquifer contaminated with hydrocarbon |url=http://www.epa.gov/esd/cmb/pdf/JAG-TDSpublished.pdf |journal=Journal of Applied Geophysics |publisher=Elsevier |volume=56 |issue=4 |pages=281–294 |doi=10.1016/j.jappgeo.2004.08.003 |access-date=15 February 2016 |bibcode=2004JAG....56..281A |archive-url=https://web.archive.org/web/20140801000000
Some TDS meters will use this electrical conductivity measurement to then infer the number of [[parts per million]] (ppm) using the above formula; 1 ppm indicates 1 mg of dissolved solids per kg of water.<ref name="Frequently Asked Questions">{{cite web|url= http://www.tdsmeter.com/faqs|title=Frequently Asked Questions|access-date=23 May 2017| archive-url=https://web.archive.org/web/20170618073154/www.tdsmeter.com/faqs| archive-date= 2017-06-18| url-status= unfit }}</ref>
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