| Texto completo | |
| Autor(es): |
Nicolodelli, Gustavo
[1, 2]
;
Villas-Boas, Paulino R.
[1]
;
Menegatti, Carlos R.
[3]
;
Senesi, Giorgio S.
[4]
;
Magalhaes, V, Daniel
;
de Souza, Daniele
[5]
;
Milori, Debora M. B. P.
[1]
;
Marangoni, Bruno S.
[2]
Número total de Autores: 8
|
| Afiliação do(s) autor(es): | [1] Embrapa Instrumentat, BR-13560970 Sao Carlos, SP - Brazil
[2] Univ Fed Mato Grosso do Sul, Phys Inst, POB 549, BR-79070900 Campo Grande, MS - Brazil
[3] Univ Sao Paulo, Sch Engn Lorena, POB 116, BR-12602810 Lorena, SP - Brazil
[4] CNR, Ist Nanotecnol NANOTEC, PLasMI Lab, Via Amendola 122-D, I-70126 Bari - Italy
[5] Univ Fed Sao Carlos, Dept Phys, POB 676, BR-13565905 Sao Carlos, SP - Brazil
Número total de Afiliações: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | APPLIED OPTICS; v. 57, n. 28, p. 8366-8372, OCT 1 2018. |
| Citações Web of Science: | 7 |
| Resumo | |
Laser-induced breakdown spectroscopy (LIBS) has attracted a lot of attention due to its potential to rapidly identify and quantify any chemical element with minimal sample preparation. Despite continuous improvements, the sensitivity of this technique still remains a challenge. In order to increase LIBS intensity, a laser-induced fluorescence (LIF) system can be coupled with LIBS to re-excite a transition of the element in the plasma by employing very expensive optical parametric oscillators (OPO). In this work, a homemade tunable continuum wave-diode laser (CW-DL) has been developed and coupled to a double pulse (DP) LIBS system to enhance the sensitivity of Pb detection in a soil sample at the transition 6s(2)6p(2)-P-3(2) -> 6s(2)6p7s-P-3(1) at 405.78 nm. Before sample analysis, the production of no scattered light by the plasma was ascertained, and the optimal temperature of 10,000 K was estimated for this transition, feasible to be achieved in DP-LIBS systems. An increase of approximately 100% for the Pb I transition at 405.78 nm was obtained by DP-LIBS-CW-DL-LIF with respect to the DP-LIBS system alone. This result opens a new promising line of research to improve LIBS sensitivity using the CW-DL approach. (C) 2018 Optical Society of America (AU) | |
| Processo FAPESP: | 13/07276-1 - CEPOF - Centro de Pesquisa em Óptica e Fotônica |
| Beneficiário: | Vanderlei Salvador Bagnato |
| Modalidade de apoio: | Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs |
| Processo FAPESP: | 17/19248-3 - Utilização da técnica LIBS para estudo de metais pesados em amostras de percolado líquido |
| Beneficiário: | Carlos Renato Menegatti |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |