A5047998447- Spectroscopy and Chemometric Analyses
- Spectroscopy Techniques in Biomedical and Chemical Research
- Advanced Chemical Sensor Technologies
- Analytical Chemistry and Chromatography
- Water Quality Monitoring and Analysis
- Pesticide Residue Analysis and Safety
- Meat and Animal Product Quality
- Analytical chemistry methods development
- Fault Detection and Control Systems
- Analytical Methods in Pharmaceuticals
- Metabolomics and Mass Spectrometry Studies
- Gold and Silver Nanoparticles Synthesis and Applications
- Biosensors and Analytical Detection
- Mass Spectrometry Techniques and Applications
- Electrochemical Analysis and Applications
- Identification and Quantification in Food
- Essential Oils and Antimicrobial Activity
- Mineral Processing and Grinding
- Soil Geostatistics and Mapping
- Petroleum Processing and Analysis
- Electrochemical sensors and biosensors
- Biodiesel Production and Applications
- Geochemistry and Geologic Mapping
- Various Chemistry Research Topics
- Dye analysis and toxicity
Universidade Estadual de Campinas (UNICAMP)
2013-2022
Weatherford College
2021
Hospital de Clínicas da Unicamp
2007-2019
Instituto de Desenvolvimento Sustentável Mamirauá
2019
Brazilian Biosciences National Laboratory
2011-2018
Pontifícia Universidade Católica de Campinas
2016-2017
John Wiley & Sons (United States)
2017
Agilent Technologies (United States)
2017
Laboratório Nacional de Ciência e Tecnologia do Bioetanol
2010-2016
Brazilian Center for Research in Energy and Materials
2016
Practical implementation of multivariate calibration models has been limited in several areas due to the requirement appropriate development and validation prove their performance standardization agencies. Herein, a detailed description application based on partial least-squares regression (PLSR) for determination soluble solids (BRIX), polarizable sugars (POL), reducing (RS) sugar cane juice, near infrared spectroscopy (NIR), alcohol industries is presented. The models, including variable...
In the present work, Raman spectroscopy and chemometric tools were explored as an analytical method to discriminate authentic counterfeit Real banknotes. The analysis was based on characterization of inks used confect Multivariate required for data analysis, since colors in banknotes are a mixture pigments spectra is complex not totally resolved. Original R$ 50 analyzed by without any sample preparation three different areas selected study: chalcographic, orange red inks. this study, only...
Single molecule surface-enhanced Raman spectroscopy (SM-SERS) has the potential to revolutionize quantitative analysis at ultralow concentrations (less than 1 nM). However, there are no established protocols generalize application of this technique in analytical chemistry. Here, a protocol for quantification using SM-SERS is proposed. The approach aims take advantage stochastic nature single-molecule regime achieved lower limits (LOQ). Two emerging contaminants commonly found aquatic...
This work verifies the potential of support vector machine (SVM) algorithm applied to near infrared (NIR) spectroscopy data develop multivariate calibration models for determination biodiesel content in diesel fuel blends that are more effective and appropriate analytical determinations this type nowadays, providing usual extended range with required accuracy. Considering difficulty suitable an that, practice, biodiesel/diesel nowadays most often used between 0 30% (v/v) content, a model is...
The major anthocyanin pigments extracted from Hibiscus acetosella flower were investigated by UV–Vis spectroscopy and multivariate curve resolution-alternating least squares (MCR-ALS). Pure spectra kinetic of the species present at different pH values recovered for anthocyanins transformation degradation products, found with without UV radiation exposure. In absence radiation, up to seven detected exposure, this number increased nine. in also when samples exposed where occurred faster two...
This paper presents a portable quantitative method for the on-site determination of uric acid in urine using surface-enhanced Raman spectroscopy (SERS) and gold nanoparticle-coated as substrate. A procedure was developed rapid preparation cost-effective SERS substrates that enabled adequate control homogeneous active area use small quantities nanoparticles per The standard addition multivariate curve resolution-alternating least squares (MCR-ALS) were applied to compensate matrix effect...
In this work, API gravity, kinematic viscosity and water content were determined in petroleum oil using Fourier transform infrared spectroscopy with attenuated total reflectance (FT-IR/ATR). Support vector regression (SVR) was used as the non-linear multivariate calibration procedure partial least squares (PLS) linear procedure. SVR models, multiplication of spectra matrix by support vectors resulted information about importance original variables. The most important variables PLS models...