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

Robbins, C.W. and Carter, D.L. and James, D.W. (1973) Potentiometric Titration of Sulfate in Water and Soil Extracts Using a Lead-Mercury Amalgam Indicator Electrode. Soil Science Society of America Proceedings. 37(2):212-215.

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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.

Item Type: Article
NWISRL Publication Number: 0254
Subjects: Soil > Chemistry > Sulfur
Mass Import - autoclassified (may be erroneous)
Depositing User: Dan Stieneke
Date Deposited: 20 Nov 2010 21:51
Last Modified: 16 Feb 2017 22:32
Item ID: 238
URI: https://eprints.nwisrl.ars.usda.gov/id/eprint/238
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