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Potentiometric Titration of Sulfate in Water and Soil Extracts Using a Lead Electrode
Author(s) -
Goertzen J. O.,
Oster J. D.
Publication year - 1972
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1972.03615995003600040052x
Subject(s) - potentiometric titration , titration , sulfate , gran plot , chemistry , ph meter , ion selective electrode , precipitation , electrode , analytical chemistry (journal) , titration curve , environmental chemistry , inorganic chemistry , biochemistry , physics , organic chemistry , meteorology , selectivity , catalysis
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.