CONICET | Buscador de Institutos y Recursos Humanos

We review second- and third-order multivariate calibration, based on the growing literature in this field, the variety of instru- mental data being produced by modern instruments, and the proliferation of algorithms capable of dealing with higher-ordermental data being produced by modern instruments, and the proliferation of algorithms capable of dealing with higher-order data. We primarily emphasize the relevance of the subject to analytical chemistry. We intend the terminology section to clarifydata. We primarily emphasize the relevance of the subject to analytical chemistry. We intend the terminology section to clarify some confusing features relating to the definition of sample constituents in second-order calibration. We then classify andsome confusing features relating to the definition of sample constituents in second-order calibration. We then classify and compare instrumental data and available algorithms. We provide insight into the relative advantages and disadvantages of thecompare instrumental data and available algorithms. We provide insight into the relative advantages and disadvantages of the existing algorithms (e.g., in terms of:existing algorithms (e.g., in terms of: achieving second-order advantage (the ability to cope with varying amounts of potential interferents in test sam-achieving second-order advantage (the ability to cope with varying amounts of potential interferents in test sam- ples);ples); presence of linear dependency in the data;presence of linear dependency in the data; handling trilinear deviations;handling trilinear deviations; using incomplete calibration data;using incomplete calibration data; extension to higher-order information;extension to higher-order information; handling missing values; and,handling missing values; and, pproviding physico-chemical information.pproviding physico-chemical information. Finally, we present a number of applications, selected from recent second- and third-order experimental works based on data obtained through excitation-emission fluorescence spectroscopy, spectral-kinetic and spectral-pH measurements, and hyphen-obtained through excitation-emission fluorescence spectroscopy, spectral-kinetic and spectral-pH measurements, and hyphen- ated techniques.ated techniques.

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