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A Multimodal Wide-Field Fourier-Transform Raman Microscope
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Multicomponent analysis using a confocal Raman microscope.

Zhengyuan Tang, Sinead J Barton, Tomas E Ward

    Applied Optics
    |August 18, 2018
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    Summary
    This summary is machine-generated.

    This study explores using confocal Raman microscopy for analyzing low-volume aqueous mixtures. The method accurately quantifies glucose, lactic acid, and urea concentrations, offering a promising analytical technique.

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    Area of Science:

    • Analytical Chemistry
    • Spectroscopy

    Background:

    • Raman spectroscopy is of significant interest for analyzing low-volume aqueous mixtures.
    • Existing methods focus on optical system design to maximize Raman photon collection.
    • Confocal Raman microscopy offers an alternative approach for multicomponent analysis.

    Purpose of the Study:

    • To investigate the use of a confocal Raman microscope setup for multicomponent analysis.
    • To quantify physiologically relevant aqueous mixtures of glucose, lactic acid, and urea.

    Main Methods:

    • Utilized a confocal Raman microscope setup.
    • Employed partial least-squares regression for quantitative analysis.
    • Performed theoretical analysis relating optical parameters to performance.

    Main Results:

    • Successfully quantified glucose, lactic acid, and urea in aqueous mixtures.
    • Achieved predicted errors of 17.81 mg/dL for glucose, 10.6 mg/dL for lactic acid, and 7.6 mg/dL for urea.
    • Demonstrated that performance can be improved with longer acquisition times.

    Conclusions:

    • Confocal Raman microscopy is a viable technique for multicomponent analysis of aqueous mixtures.
    • The study provides a theoretical framework for optimizing confocal Raman microscopy performance.
    • This method shows potential for accurate quantification of key biomolecules.