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Determination of Sulfates in Drinking Water

✍ Scribed by Emilia Kirowa-Eisner; Dora Tzur; Mordechai Brand; Chaim Yarnitzky

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
165 KB
Volume
61
Category
Article
ISSN
0026-265X

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✦ Synopsis

Sulfates in drinking water in the concentration range 20 M to 20 mM are conductometrically titrated with the titrant Ba(OAc) 2 in the presence of ethanol. The titrations are performed in an automatic mode with monotonic addition (constant flow rate) of titrant. The titrations are preceded by a flow pretreatment of the samples, in which the interfering species Ca 2ϩ , Mg 2ϩ , and bicarbonates are removed. The pretreatment apparatus consists of two cation-exchange columns with conductometric probes at their exits and a thin-layer degassing device for removal of CO 2 . The advantages of tungsten in a two-electrode conductometric cell are demonstrated.

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