• Publications
  • Influence
Discrimination of management effects on soil parameters by using principal component analysis: a multivariate analysis case study
One of the major interests in soil analysis is the integrated evaluation of soil properties, which might be indicators of soil quality. Unsupervised methods of multivariate statistics are powerfulExpand
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Least-squares support vector machines and near infrared spectroscopy for quantification of common adulterants in powdered milk.
This paper proposes the use of the least-squares support vector machine (LS-SVM) as an alternative multivariate calibration method for the simultaneous quantification of some common adulterantsExpand
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Comparison and application of near-infrared (NIR) and mid-infrared (MIR) spectroscopy for determination of quality parameters in soybean samples
Abstract Grain composition is directly related to maintenance of quality. Chemical analyses have been determined using traditional and laborious methods, which are time-consuming and generateExpand
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Determination of amylose content in starch using Raman spectroscopy and multivariate calibration analysis
AbstractFourier transform Raman spectroscopy and chemometric tools have been used for exploratory analysis of pure corn and cassava starch samples and mixtures of both starches, as well as for theExpand
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Exploratory analysis of the volatile profile of beers by HS–SPME–GC
Kohonen Neural Network maps were used for exploratory analysis of Brazilian Pilsner beers. The input data consisted of the peak areas of the volatile profile compounds of samples obtained afterExpand
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Determination of organic matter in soils using radial basis function networks and near infrared spectroscopy
Abstract A relationship was established between the organic matter content in soils determined by conventional chemical measurements and by diffuse reflectance spectra in the near infrared regionExpand
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Second- and third-order multivariate calibration: data, algorithms and applications
We review second- and third-order multivariate calibration, based on the growing literature in this field, the variety of data being produced by modern instruments, and the proliferation of algorithms capable of dealing with higher-order data. Expand
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N-way PLS applied to simultaneous spectrophotometric determination of acetylsalicylic acid, paracetamol and caffeine.
  • M. Sena, R. Poppi
  • Chemistry, Medicine
  • Journal of pharmaceutical and biomedical analysis
  • 27 January 2004
In this work, a simple and rapid analytical procedure was proposed for simultaneous determination of acetylsalicylic acid (ASA), paracetamol (PRC, also known as acetaminophen) and caffeine (CAF) inExpand
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Application of mid infrared spectroscopy and iPLS for the quantification of contaminants in lubricating oil
Abstract The feasibility of using a narrow spectral range in the mid infrared region for a rapid and conclusive determination of contaminants (gasoline, ethylene glycol and water) in lubricating oilExpand
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Determination of organic matter in soil using near-infrared spectroscopy and partial least squares regression
An alternative approach for the determination of organic matter content in soil is proposed, using near infrared spectroscopy and partial least squares regression for data modeling. This method wasExpand
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