Performance Evaluation of a Portable Laser-Induced Fluorescence Spectroscopy System for the Assessment of the Humification Degree of the Soil Organic Matter

Autor(es)

dos Santos, Cleber H. ^{[1, 2]} ; Romano, Renan A. ^{[3, 2]} ; Nicolodelli, Gustavo ^[2] ; Carvalho, Camila M. ^{[3, 2]} ; Villas-Boas, Paulino R. ^[2] ; Martin-Neto, Ladislau ^[2] ; Montes, Celia R. ^[4] ; Melfi, Adolpho J. ^[5] ; Milori, Debora M. B. P. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil

^[2] Embrapa Instrumentacao, BR-13560970 Sao Carlos, SP - Brazil

^[3] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil

^[4] Univ Sao Paulo, Ctr Energia Nucl Agr, BR-13418900 Piracicaba, SP - Brazil

^[5] Univ Sao Paulo, NUPEGEL, Inst Energia & Ambiente, BR-13418900 Piracicaba, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of the Brazilian Chemical Society; v. 26, n. 4, p. 775-783, APR 2015.
• Citações Web of Science: 7

Resumo

Laser-induced fluorescence spectroscopy (LIFS) has shown advantages for analyses of whole soil, providing results about chemical structure of soil organic matter (SOM) without the need for a chemical fractionating process; thus, allowing direct analysis of soils. Moreover, another advantage is the potential for the development of portable systems, which could be usable in field analyses. The aim of this paper is to evaluate the performance of a portable LIFS system to assess the humification degree (HD) of SOM. A good correlation (R > 0.8) was obtained for results (HD) achieved using the proposed portable system and a conventional fluorescence spectrometric method for humic acid. In addition, the results obtained using the portable LIFS system statistically agreed with the ones achieved using a benchtop LIFS system already described in the literature for such application (R = 0.953). Thus, the portable LIFS system constitutes an affordable option for the in situ characterization of SOM. (AU)

• Processo FAPESP: 04/14315-4 - Uso de efluentes de esgotos tratados por processos biológicos (lagoas de estabilização e reatores UASB/lodos ativados) em solos agrícolas
• Beneficiário: Adolpho José Melfi
• Modalidade de apoio: Auxílio à Pesquisa - Temático