A5082364925- Laser-induced spectroscopy and plasma
- Analytical chemistry methods development
- Cultural Heritage Materials Analysis
- Mercury impact and mitigation studies
- Extraction and Separation Processes
- Heavy Metals in Plants
- Electrochemical Analysis and Applications
- Botanical Research and Applications
- Nuclear Physics and Applications
- Metallurgical Processes and Thermodynamics
- Pacific and Southeast Asian Studies
- Plant Diversity and Evolution
- Mass Spectrometry Techniques and Applications
- Spectroscopy and Chemometric Analyses
- Heavy metals in environment
Universidade Federal do ABC
2017-2019
Universidade de São Paulo
2009-2018
Centro Regional de Derechos Humanos y Justicia de Género, Corporación Humanas
2018
Centro Universitário Fundação Santo André
2018
It has been demonstrated that laser induced breakdown spectrometry (LIBS) can be used as an alternative method for the determination of macro (P, K, Ca, Mg) and micronutrients (B, Fe, Cu, Mn, Zn) in pellets plant materials. However, information is required regarding sample preparation analysis by LIBS. In this work, methods involving cryogenic grinding planetary ball milling were evaluated leaves comminution before preparation. The particle sizes associated to chemical properties such fiber...
Pulse repetition rates and the number of laser pulses are among most important parameters that do affect analysis solid materials by induced breakdown spectroscopy, knowledge their effects is fundamental importance for suggesting analytical strategies when dealing with ablation processes polymers. In this contribution, influence these in ablated mass features craters was evaluated polypropylene high density polyethylene plates containing pigment-based PbCrO4. Surface characterization profile...
Laser-induced breakdown spectroscopy (LIBS) is a multi-elemental technique with multiple advantages. However, direct determination in liquid samples not an easy task since laser water interaction can affect the precision and accuracy of method cause loss sensitivity. To enable LIBS application sample analysis, some strategies such as liquid-to-solid transfer have been used. This work proposes quantification chromium by using ceramic solid support. Results showed that selectively adsorbs...
The calibration and quantitative measurement is the " Achilles heel of LIBS technique. This paper deals with a method developed for direct K Mg in plant samples. Instrumental parameters were optimized best condition found was 50 μm spot size, 10 Hz laser repetition rate, 75 accumulated pulses 25 mJ/pulse 0.25 μs delay time. For calibration, use synthetic standard calibrating material prepared by addition increasing concentrations wood, filter babassu mesocarp proposed order to assess...
The first report of quantitative measurement calcium, magnesium, potassium and sodium in bovine chicken meat by LIBS.
Matte photographic paper was explored as a low-cost material for metal-ion retention. The extraction promoted by ultrasound, the mechanical waves of which forced adhesion to surface an ion pair formed DTAB (dodecyltrimethylammonium bromide) with anionic coordination complex metal ions and SPADNS (1,8-dihydroxy-2-(4-sulfophenylazo)naphthalene-3,6-disulfonic acid trisodium salt). As proof concept, migration copper present in aqueous solution solid phase their direct measurement laser-induced...
A novel vortex assisted dispersive liquid-phase microextraction procedure combined with ICP techniques for preconcentration and determination of REEs in water.
Abstract Mushrooms are bioaccumulating organisms commonly used in selenium (Se) enrichment studies. However, the addition of Se culture medium may alter distribution other essential elements mushroom fruiting body. To evaluate effects enrichment, Ca, Mg, and K distributions pink oyster ( Pleurotus djamor ) Mg white ostreatus mushrooms were mapped by laser-induced breakdown spectroscopy (LIBS), which can be at room temperature requires minimal or no sample preparation. It was verified that...
The direct analysis of high silicon content samples by Laser-Induced Breakdown Spectrometry (LIBS) is a good alternative, since the decomposition with refractory characteristics not an easy task.
Due to matrix interference and sample particle size effects, some of the most important difficult issues in laser‐induced breakdown spectroscopy (LIBS) analysis are calibration quantitative measurement a complex matrix. This study proposes use borate fusion as an alternative preparation procedure for Al, Fe, Si Ti bauxite by LIBS. Analytical curves were made using certified reference materials (CRM), precision accuracy methods evaluated analysing additional CRM, two different approaches:...