Evaluation of laser-induced breakdown spectroscopy with nanosecond laser at 266 nm and femtosecond laser at 780 nm for the analysis of plant materials

• Grant number: 13/09260-5
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• Start date: September 01, 2013
• End date: January 31, 2014
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Analytical Chemistry
• Principal Investigator: Francisco José Krug
• Grantee: Gabriel Gustinelli Arantes de Carvalho
• Supervisor: Javier Laserna
• Host Institution: Centro de Energia Nuclear na Agricultura (CENA). Universidade de São Paulo (USP). Piracicaba , SP, Brazil
• Institution abroad: Universidad de Málaga (UMA), Spain
• Associated to the scholarship: 10/16379-0 - Sampling strategies for analysis of biological materials by laser induced breakdown spectrometry, BP.DR

Abstract

Systematic studies dealing with analysis of plant materials by laser-induced breakdown spectroscopy (LIBS) with different lasers are still necessary, and one would expect that matrix effects could be minimized by using either nanosecond lasers at UV or femtosecond lasers, which generally provide ablation processes less dependent on physical and chemical properties of the matrix. The aim of this project is to investigate the performance of nanosecond laser at 266 nm, in terms of precision of measurements and trueness, for the simultaneous determination of Ca, K, P, Mg, B, Cu, Fe, Mn and Zn in leaves from different plants species. In a second step, it will be evaluated a femtosecond laser for the determination of the abovementioned elements in plant materials. Experiments will be performed with a Nd:YAG laser (6 ns, 266 nm, 10 Hz) and a Ti:Sapphire laser (35 fs, 780 nm, 10kHz), and a spectrometer with Echelle optics and ICCD. Test samples will be analyzed either as pressed pellets or dried leaves. In general, this study will contribute to the PhD thesis entitled "Sampling strategies in LIBS analysis of plant materials". (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

ARANTES DE CARVALHO, GABRIEL GUSTINELLI; MOROS, JAVIER; SANTOS, JR., DARIO; KRUG, FRANCISCO JOSE; LASERNA, J. JAVIER. Direct determination of the nutrient profile in plant materials by femtosecond laser-induced breakdown spectroscopy. Analytica Chimica Acta, v. 876, p. 26-38, MAY 30 2015. (13/09260-5, 10/16379-0)