Characterizing Dissolved Organic Matter Using PARAFAC Modeling of Fluorescence Spectroscopy: A Comparison of Two Models
| العنوان: | Characterizing Dissolved Organic Matter Using PARAFAC Modeling of Fluorescence Spectroscopy: A Comparison of Two Models |
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| المؤلفون: | Jason B. Fellman, Mathew P. Miller, David V. D'Amore, Rose M. Cory, Daniel M. White |
| المصدر: | Environmental Science & Technology. 43:6228-6234 |
| بيانات النشر: | American Chemical Society (ACS), 2009. |
| سنة النشر: | 2009 |
| مصطلحات موضوعية: | Chemistry, Significant difference, Analytical chemistry, Fluorescence spectrometry, Water, Soil science, General Chemistry, Residual, River water, Gas Chromatography-Mass Spectrometry, Fluorescence spectroscopy, Nutrient content, Soil, Spectrometry, Fluorescence, Models, Chemical, Solubility, Dissolved organic carbon, Correlation analysis, Regression Analysis, Environmental Chemistry, Organic Chemicals, Factor Analysis, Statistical, Alaska |
| الوصف: | We evaluated whether fitting fluorescence excitation-emission matrices (EEMs) to a previously validated PARAFAC model is an acceptable alternative to building an original model. To do this, we built a 10-component model using 307 EEMs collected from southeast Alaskan soil and streamwater. All 307 EEMs were then fit to the existing model (CM) presented in Cory and McKnight (Environ. Sci. Technol. 2005, 39, 8142-8149). The first approach for evaluating whether the EEMs were fit well to the CM model was an evaluation of the residual EEMs, and we found 22 EEMs were fit poorly by the CM model. Our second measure for verifying whether EEMs were fit well to the CM model was a comparison of correlations between the percent contribution of PARAFAC components and DOM measurements (e.g., dissolved nutrient concentrations), and we found no significant difference Ip0.05) between the two models. These results support the approach of fitting EEMs to an existing model when DOM is collected from similar environments, which can potentially reduce some of the problems when building an original PARAFAC model. However, it is important to recognize that some of the sensitivity or ecological interpretative power may be lost when fitting EEMs to an existing model. |
| تدمد: | 1520-5851 0013-936X |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::17aed0b143da1a12b095228d6505ee58Test https://doi.org/10.1021/es900143gTest |
| رقم الانضمام: | edsair.doi.dedup.....17aed0b143da1a12b095228d6505ee58 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15205851 0013936X |
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