HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Robbins, C. W. Articles by James, D. W. Search for Related Content PubMed Articles by Robbins, C. W. Articles by James, D. W. Agricola Articles by Robbins, C. W. Articles by James, D. W.

Potentiometric Titration of Sulfate in Water and Soil Extracts Using a Lead-Mercury Amalgam Indicator Electrode¹

ABSTRACT

Sulfate concentrations in pure solutions, drainage waters, and soil saturation extracts were determined potentiometrically using a 70% Pb and 30% Hg amalgam indicator electrode and a saturated calomel reference electrode. Adjusting all samples to pH 4.7 allowed titration to a fixed potential on an automatic titrator. Sulfate concentrations ranging from 0.2 to 10 mmole/liter were determined by this method and compared with concentration determined by a turbidimetric method. Results from the two methods did not differ significantly, but the potentiometric titration method was more precise, sensitive, and rapid.

¹ Joint contribution from the Agr. Res. Serv., USDA, and the Dep. of Soils & Biometeorology, Utah State Univ.; Idaho Agr. Exp. Sta. cooperating.

² Soil Scientists, Snake River Conservation Research Center, Route 1, Box 186, Kimberly, Idaho 83341, and Associate Professor of Soils, Utah State Univ., Logan, 84321, respectively.

Received for publication June 23, 1972. Accepted for publication December 5, 1972.