Multisensor hyperspectral imaging approach for the microchemical analysis of ultramarine blue pigments.

ABSTRACT: This work presents a multisensor hyperspectral approach for the characterization of ultramarine blue, a valuable historical pigment, at the microscopic scale combining the information of four analytical techniques at the elemental and molecular levels. The hyperspectral images collected were combined in a single hypercube, where the pixels of the various spectral components are aligned on top of each other. Selected spectral descriptors have been defined to reduce data dimensionality before applying unsupervised chemometric data analysis approaches. Lazurite, responsible for the blue color of the pigment, was detected as the major mineral phase present in synthetic and good quality pigments. Impurities like pyrite were detected in lower quality samples, although the clear identification of

SUBMITTER: Gonzalez-Cabrera M 

PROVIDER: S-EPMC8758711 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature