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A down-to-earth analyst view of rotational ambiguity in second-order calibration with multivariate curve resolution: a tutorial
(Elsevier Science, 2021-04)
Rotational ambiguity is a phenomenon with the potential of generating an uncertainty in the estimation of analyte concentrations in protocols based on matrix instrumental data processed by multivariate curve resolution - ...
Improving the Analytical Reproducibility of Electrochemical Capacitive Sensors Using the Chemical Hardness of the Interface
(2021-01-01)
Miranda and Bueno recently demonstrated that chemical hardness could be experimentally measured and used as a chemical reactivity index of electrochemical interfaces. Herein, we applied this reactivity index concept to ...
Unusual calibration curves observed for iron using high-resolution continuum source graphite furnace atomic absorption spectrometry
(Elsevier, 2010)
The simultaneous determination of cadmium and iron in plant and soil samples has been investigated using
high-resolution continuum source graphite furnace atomic absorption spectrometry. The primary cadmium
resonance ...
Rapid determination of zinc in foods by flow injection analysis with flame AAS using gradient calibration method
(2004-09-01)
A calibration method was developed using flow injection analysis (FI) with a Gradient Calibration Method (GCM). The method allows the rapid determination of zinc In foods (approximately 30 min) after treatment with ...
Espectroscopia no infravermelho próximo para estimativa dos teores de argila e de matéria orgânica em amostras de solo
(Universidade Federal de Santa MariaBrasilAgronomiaUFSMPrograma de Pós-Graduação em Ciência do SoloCentro de Ciências Rurais, 2019-07-19)
Among the constituents of the soil, special attention is given to soil clay and soil organic matter (SOM), since, among other aspects, they are determinant for nutrient retention and for the formation of aggregates, which ...
Multi-way chromatographic calibration: A review
(Elsevier Science, 2019-02-22)
This review discusses recent advances in both theory and experiment regarding multi-way chromatographic calibration. The focus is directed towards the chemometric processing of multi-way data arrays in which one or more ...
Strategy To Obtain Accurate Analytical Solutions in Second-Order Multivariate Calibration with Curve Resolution Methods
(American Chemical Society, 2018-08)
A novel procedure is described for processing the second-order data matrices with multivariate curve resolution-alternating least-squares; while the data set is nontrilinear and severe profile overlapping occurs in the ...