The Use of Total Ionic Strength Adjusting Buffers in Determining Fluoride Concentration in Soil Solutions by Ion Selective Electrometry

Menzies N.W., Edwards D.G. and Bell L.C. (1993) The Use of Total Ionic Strength Adjusting Buffers in Determining Fluoride Concentration in Soil Solutions by Ion Selective Electrometry. Communications in Soil Science and Plant Analysis, 24 15-16: 1865-1882. doi:10.1080/00103629309368924


Author Menzies N.W.
Edwards D.G.
Bell L.C.
Title The Use of Total Ionic Strength Adjusting Buffers in Determining Fluoride Concentration in Soil Solutions by Ion Selective Electrometry
Journal name Communications in Soil Science and Plant Analysis   Check publisher's open access policy
ISSN 1532-2416
Publication date 1993-09-01
Sub-type Article (original research)
DOI 10.1080/00103629309368924
Volume 24
Issue 15-16
Start page 1865
End page 1882
Total pages 18
Subject 1102 Cardiovascular Medicine and Haematology
1111 Nutrition and Dietetics
1900 Earth and Planetary Sciences
2300 Environmental Science
Abstract Total ionic strength buffers based on citrate at pH 7.5 and cyclohexylenediaminetetra-acetic acid (CDTA) at pH 5.2 were evaluated for use when determining fluoride (F) concentration in soil solutions. Both buffers achieved acceptable recoveries of F added to ultra-filtered (0.025 μm) solutions. Recovery of F added to unfiltered and 0.22 μm filtered solution was low when the CDTA buffer was used. This effect was attributed to the adsorption of F by micro-particulate materials present in these samples. The use of this buffer would need to be restricted to samples in which micro-particulates were not present. The performance of the citrate buffer was not affected by the presence of micro-particulates; however, electrode response times, and departure from Nernstian response at low F concentrations, were greater when this buffer was employed. Fluoride was found to be present at low concentrations in the soil solution of the 60 virgin highly weathered soils tested. The F concentration in 75% of the surface samples was <3 μM, while all subsoil samples had soil solution F concentrations <1 μ M.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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