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Multicomponent quantitative spectroscopic analysis without reference substances based on ICA modelling

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Abstract

A fast and reliable spectroscopic method for multicomponent quantitative analysis of targeted compounds with overlapping signals in complex mixtures has been established. The innovative analytical approach is based on the preliminary chemometric extraction of qualitative and quantitative information from UV–vis and IR spectral profiles of a calibration system using independent component analysis (ICA). Using this quantitative model and ICA resolution results of spectral profiling of “unknown” model mixtures, the absolute analyte concentrations in multicomponent mixtures and authentic samples were then calculated without reference solutions. Good recoveries generally between 95% and 105% were obtained. The method can be applied to any spectroscopic data that obey the Beer–Lambert–Bouguer law. The proposed method was tested on analysis of vitamins and caffeine in energy drinks and aromatic hydrocarbons in motor fuel with 10% error. The results demonstrated that the proposed method is a promising tool for rapid simultaneous multicomponent analysis in the case of spectral overlap and the absence/inaccessibility of reference materials.

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Acknowledgements

Y.B.M. acknowledges funding in the framework of the Russian President’s Grant for Young Scientists (MK-6226.2016.3).

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Authors and Affiliations

  1. Institute of Chemistry, Saratov State University, Astrakhanskaya Street 83, 410012, Saratov, Russia

    Yulia B. Monakhova & Svetlana P. Mushtakova

  2. Spectral Service AG, Emil-Hoffmann-Straße 33, 50996, Cologne, Germany

    Yulia B. Monakhova

Authors
  1. Yulia B. Monakhova
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  2. Svetlana P. Mushtakova
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Correspondence to Yulia B. Monakhova.

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Monakhova, Y.B., Mushtakova, S.P. Multicomponent quantitative spectroscopic analysis without reference substances based on ICA modelling. Anal Bioanal Chem 409, 3319–3327 (2017). https://doi.org/10.1007/s00216-017-0275-0

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  • DOI: https://doi.org/10.1007/s00216-017-0275-0

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