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This article in SSSAJ

  1. Vol. 36 No. 4, p. 691-693
     
    Received: Jan 4, 1972
    Published: July, 1972


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doi:10.2136/sssaj1972.03615995003600040052x

Potentiometric Titration of Sulfate in Water and Soil Extracts Using a Lead Electrode1

  1. J. O. Goertzen and
  2. J. D. Oster2

Abstract

Abstract

Sulfate concentrations in natural waters and soil-water extracts were determined semiautomatically using a lead-ion electrode to indicate the solution potential change at the endpoint, a constant flow device to deliver the titrant, a pH-mV meter to measure the potential, and a strip chart recorder to plot the solution potential thus indicating the endpoint. Sulfate concentrations as low as 0.5 meq/liter in the sample solution were determined by the potentiometric titration system. This semiautomated direct titration of sulfate has the advantages of increased sensitivity and speed as compared with the precipitation method.

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