Evaluation of Femtosecond Laser-Induced Breakdown Spectroscopy for Analysis of Animal Tissues
Santos Junior, Dario [UNIFESP]
Samad, Ricardo Elgul
Trevizan, Lilian Cristina
Freitas, Anderson Zanardi de
Vieira, Nilson Dias
Krug, Francisco Jose
Is part ofApplied Spectroscopy
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The aim of this work was to evaluate the performance of femtosecond laser-induced breakdown spectroscopy (fs-LIBS) for the determination of elements in animal tissues. Sample pellets were prepared from certified reference materials, such as liver, kidney, muscle, hepatopancreas, and oyster, after cryogenic grinding assisted homogenization. Individual samples were placed in a two-axis computer-controlled translation stage that moved in the plane orthogonal to a beam originating from a Ti:Sapphire chirped-pulse amplification (CPA) laser system operating at 800 mu and producing a train of 840 mu J and 40 fs pulses at 90 Hz. The plasma emission was coupled into the optical fiber of a high-resolution intensified charge-coupled device (ICCD)-echelle spectrometer. Time-resolved characteristics of the laser-produced plasmas showed that the best results were obtained with delay times between 80 and 120 ns. Data obtained indicate both that it is a matrix-independent sampling process and that fs-LIBS can be used for the determination of Ca, Cu, Fe, K, Mg, Na, and P, but efforts must be made to obtain more appropriate detection limits for Al, Sr, and Zn.
CitationApplied Spectroscopy. Frederick: Soc Applied Spectroscopy, v. 62, n. 10, p. 1137-1143, 2008.
SponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
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