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https://hdl.handle.net/2440/27356
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Type: | Journal article |
Title: | Limitations of acid digestion techniques for the determination of fluoride in plant material |
Author: | Stevens, D. McLaughlin, M. Alston, A. |
Citation: | Communications in Soil Science and Plant Analysis, 1995; 26(11-12):1823-1842 |
Publisher: | M. Dekker |
Issue Date: | 1995 |
ISSN: | 0010-3624 1532-2416 |
Abstract: | Procedures for determination of fluoride (F) in plant material employing acid digestion and solution analysis by ion specific electrode (ISE) were compared to alkali fusion using a range of plant materials. The efficiency of the methods were assessed using standard reference plant material (SRM) not previously available for plant F analysis. All acid digestion procedures tested failed to obtain the certified value for F in the SRM. This was due to failure of the acids to liberate F bound strongly within silicate minerals found in the plant materials. Acid digestion is therefore not recommended for determination of total F, but could be used to determine labile F in plant materials. During investigation of the acid digestion procedures, it was also found that F concentrations determined in solution using the ISE are sensitive to solution pH, even at solution pH values where complexation of F with hydrogen ions (H⁺) can be discounted. It is therefore recommended that both ionic strength and pH of sample and standard solutions be matched when determining F concentrations in solution using the F-ISE. |
Keywords: | Plant tissue Assay Fluorides Sample preparation Acid digestion Microwave Ion selective electrode Analysis method Inorganic element |
DOI: | 10.1080/00103629509369411 |
Published version: | http://dx.doi.org/10.1080/00103629509369411 |
Appears in Collections: | Aurora harvest 2 Environment Institute publications Soil and Land Systems publications |
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