Instrumental and Experimental Conditions for the Application of Fourier Transform Infrared Analysis on Soil and Humic Acid Samples, Combined with Chemometrics Tools and Scanning Electron Microscopy
| Autor: | Vanderlei Aparecido de Lima, Nathalie Merlin, Larissa M. Santos-Tonial |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
chemistry.chemical_classification
Scanning electron microscope Potassium bromide background Soil organic matter Extraction (chemistry) Analytical chemistry General Chemistry pretreatment baseline Chemometrics chemistry.chemical_compound Hydrofluoric acid chemistry FTIR soil organic matter Humic acid Fourier transform infrared spectroscopy |
| Zdroj: | Journal of the Brazilian Chemical Society v.26 n.9 2015 Journal of the Brazilian Chemical Society Sociedade Brasileira de Química (SBQ) instacron:SBQ Journal of the Brazilian Chemical Society, Volume: 26, Issue: 9, Pages: 1920-1927, Published: SEP 2015 |
| Popis: | The investigation of the chemical properties of soil organic matter (OM), by the use of some spectroscopic techniques, requires the removal of the mineral impurities of the samples. Therefore, the objective of this study was to evaluate the influence of the pretreatment of samples and, also, the influence of instrumental conditions on the qualitative and quantitative results obtained by Fourier transform infrared (FTIR) spectroscopy to soil and humic acid (HA) samples. The obtained results showed that: the mass of potassium bromide (KBr) used on the background pellet influenced the characteristics of samples spectra; the baseline correction changes the intensity of the absorptions; both the extraction of HA as the hydrofluoric acid (HF) treatment were not efficient in removing the mineral impurities of the samples. The scanning electron microscopy (SEM) analysis showed differences due to the extraction, but not due to the HF treatment. The present study shows the importance of the use of adequate treatments, before, during and after the spectroscopic study of soil OM, providing valuable information for future works. |
| Databáze: | OpenAIRE |
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