Comparative assessment of the methods for exchangeable acidity measuring
| Autor: | G. A. Zaboeva, E. V. Vanchikova, E. V. Shamrikova, E. V. Kyz'yurova, Yu. I. Bobrova, N. V. Grishchenko, N. V. Bespyatykh |
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| Rok vydání: | 2016 |
| Předmět: |
Potassium
Metal ions in aqueous solution Extraction (chemistry) Inorganic chemistry Potentiometric titration Barium chloride Atomic emission spectroscopy Soil Science chemistry.chemical_element 04 agricultural and veterinary sciences 010501 environmental sciences 01 natural sciences chemistry.chemical_compound chemistry Soil pH Soil water 040103 agronomy & agriculture 0401 agriculture forestry and fisheries 0105 earth and related environmental sciences Earth-Surface Processes |
| Zdroj: | Eurasian Soil Science. 49:512-518 |
| ISSN: | 1556-195X 1064-2293 |
| DOI: | 10.1134/s1064229316050136 |
| Popis: | A comparative assessment of the results of measuring the exchangeable acidity and its components by different methods was performed for the main mineral genetic horizons of texturally-differentiated gleyed and nongleyed soddy-podzolic and gley-podzolic soils of the Komi Republic. It was shown that the contents of all the components of exchangeable soil acidity determined by the Russian method (with potassium chloride solution as extractant, с(KCl) = 1 mol/dm3) were significantly higher than those obtained by the international method (with barium chloride solution as extractant, с(ВаCl2) = 0.1 mol/dm3). The error of the estimate of the concentration of Н+ ions extracted with barium chloride solution equaled 100%, and this allowed only qualitative description of this component of the soil acidity. In the case of the extraction with potassium chloride, the error of measurements was 50%. It was also shown that the use of potentiometric titration suggested by the Russian method overestimates the results of soil acidity measurement caused by the exchangeable metal ions (Al(III), Fe(III), and Mn(II)) in comparison with the atomic emission method. |
| Databáze: | OpenAIRE |
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