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Showing 1 to 11 of 11 for “"multivariate calibration"”.
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MULTIVARIATE CALIBRATION FOR ICP-AES
… thesis details the application of univariate and multivariate calibration methods for the prediction of Pt, Pd, and Rh in acid-digested and of Au, Ag and Pd in fusion-digested autocatalyst samples. Of all the univariate calibration methods investigated matrix matching proved the most accurate …
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Using multivariate calibration to evaluate hominin brain/body size relationships
"Modern humans are highly encephalized, having relatively large brains despite our already large bodies. The current assumption is that brains and bodies have both increased in size during the course of human evolution but the rate, timing, and evolutionary relationship of the two are still …
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Measurement of blood analytes in turbid biological tissue using near-infrared Raman spectroscopy
… The collected Raman spectra were analyzed with multivariate calibration techniques, and compared with hospital measurements. The analysis of the spectra of whole blood samples demonstrate that many chemical components in ex vivo whole blood samples can be measured accurately with near-infrared …
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Chemometric methods for the analysis of process spectra using minimal reference data
To construct a spectroscopic multivariate calibration model, a set of representative mixture spectra (independent variables) and the corresponding reference values for the property of interest (dependent variables) must be obtained. For a dynamic system such as a batch or semi-batch chemical …
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Improvements on Instrumentation to Explore the Multidimensionality of Luminescence Spectroscopy
… vibrational luminescence data with second order multivariate calibration algorithms. The use of cryogenic fiber optic probes is extended to commercial instrumentation. An attractive feature of spectrofluorimeters with excitation and emission monochromators is the possibility to record synchronous …
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Chemometrics applied to the discrimination of synthetic fibers by microspectrophotometry
… different dye loadings along with introducing a multivariate calibration approach to determine the dye concentration of fibers. In the first study, background subtracted and normalized visible spectra from eleven blue acrylic exemplars dyed with varying compositions of dyes were discriminated …
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Aplicación de técnicas quimiométricas a la resolución de señales electroquímicas solapadas
… (ANN) can be underlined, as well as several multivariate calibration methods: Multilinear Regression (MLR), Partial-Least Squares Regression (PLS) and Principal Component Regression (PCR).The chemometric methodology developed has been applied to certain electrochemical systems of different …
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Clinical feasibility of Raman spectroscopy for quantitative blood glucose measurement
… correction scheme to correct for the calibration errors arising from the lag between glucose concentrations in the bloodstream and the interstitial fluid. In addition, Monte Carlo simulations were employed to study the differences in the distribution of Raman scattered photons along …
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Designing A Calibration Set in Spectral Space for Efficient Development of An NIR Method For Tablet Analysis
<p>Designing a calibration set is the first step in developing a spectroscopic calibration method for quantitative analysis of pharmaceutical tablets. This step is critical because successful model development depends on the suitability of the calibration data. For spectroscopic-based methods, …
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Biological Indicators of Forest Dieback
… chlorophyll levels from plant extracts. A multivariate calibration method was used in conjunction with HPLC to determine the accuracy of these equations for determining the levels of chlorophyll and b. The results show revealed that the equations appear to be underestimating the chlorophyll …
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Electrical detection of atmospheric pollutants and detergents on silicon
… in ambipolar JNTs is leveraged to develop a multivariate calibration model, improving their ability to differentiate between pollutant gases. In Chapter 4, the focus shifts to reducing pollutant ammonia (NH3). Ambipolar Si-JNTs exposed to NH3 under ultraviolet light (254 nm) excitation …