A clay suspension stability end point titration method for measuring cation exchange capacity of soils

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dc.creatorPleysier, J.L.
dc.creatorJanssens, J.
dc.creatorCremers, A.
dc.date1986-07-01
dc.date2025-10-16T13:10:23Z
dc.date2025-10-16T13:10:23Z
dc.date.accessioned2026-06-27T16:05:58Z
dc.descriptionThe silver‐thiourea (AgTU) method for cation exchange capacity (CEC) measurement of soils involves the assessment of Ag in the AgTU soil extracts. Silver can be easily measured by an atomic absorption spectrophotometer or with a radio isotope and scintillation counter. Laboratories for soil analysis in developing countries often do not have access to such instruments. A simple method for measuring Ag in the AgTU soil extracts was, therefore, developed. The method involves a stability end point titration of a stable montmorillonite clay suspension calibrated with AgTU solutions ranging from 5 × 10−4 to 10−2 mol L−1. The AgTU‐CEC measured by this clay titration method was compared with the “effective” CEC by NH4OAc and KCI extractions and with the AgTU‐CEC measured by an atomic absorption spectrophotometer. The correlation coefficients were 0.95 and 0.97, respectively.
dc.formatapplication/pdf
dc.identifierhttps://hdl.handle.net/10568/177164
dc.identifier.urihttp://hdl.handle.net/123456789/122482
dc.languageen
dc.publisherWiley
dc.rightsLimited Access
dc.sourcePleysier, J., Janssens, J., & Cremers, A. (1986). A clay suspension stability end point titration method for measuring cation exchange capacity of soils. Soil Science Society of America Journal, 50, (4), 887-891.
dc.subjectafrican
dc.subjecttitration
dc.subjectbase saturation
dc.subjectflocculation
dc.subjectclay
dc.titleA clay suspension stability end point titration method for measuring cation exchange capacity of soils
dc.typeJournal Article

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Instituto Internacional de Agricultura Tropical (IITA)