The Determination of Barium in Waste Water. Complexometric Method.
ENVIRONMENTAL HEALTH LAB MCCLELLAN AFB CALIF
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A complexometric method is described which is applicable to most natural and treated waters whose barium content ranges from 0 to 10 ppm. The method fails at times with acid or pulluted waters that contain excessive amounts of heavy metals. Barium is determined by the difference between the titrant volume of disodium dihydrogen ethylenediamine tetraacetate Na2EDTA required by an untreated sample and a sample from which barium has been precipitated as barium sulfate. A solution of Eriochrome Black T dye is bright blue in the absence of alkaline earths, but as an indicator, the alkaline earths can be titrated with Na2EDTA. Interferences are also discussed. Author
- Inorganic Chemistry
- Water Pollution and Control