Accession Number : AD0751885

Title :   The Determination of Barium in Waste Water. Complexometric Method.

Descriptive Note : Final rept.,

Corporate Author : ENVIRONMENTAL HEALTH LAB MCCLELLAN AFB CALIF

Personal Author(s) : Mesman,Brick B.

Report Date : APR 1968

Pagination or Media Count : 5

Abstract : 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)

Descriptors :   (*BARIUM, *VOLUMETRIC ANALYSIS), (*WATER POLLUTION, BARIUM), ALKALINE EARTH METALS, QUANTITATIVE ANALYSIS, COMPLEX COMPOUNDS, DYES, ETHYLENEDINITRILO TETRAACETATES, CHEMICAL PRECIPITATION

Subject Categories : Inorganic Chemistry
      Water Pollution and Control

Distribution Statement : APPROVED FOR PUBLIC RELEASE