Chemical images of marine bio-active compounds by surface enhanced Raman spectroscopy and transposed orthogonal partial least squares (T-OPLS)
Journal article, 2012

Surface enhanced Raman spectroscopy combined with transposed Orthogonal Partial Least Squares (T-OPLS) was shown to produce chemical images of the natural antibacterial surface-active compound 1,1,3,3-tetrabromo-2-heptanone (TBH) on Bonnemaisonia hamifera. The use of gold colloids function-alised with the internal standard 4-mercapto-benzonitrile (MBN) made it possible to create images of the relative concentration of TBH over the surfaces. A gradient of TBH could be mapped over and in the close vicinity of the B. hamifera algal vesicles at the attomol/pixel level. T-OPLS produced a measure of the spectral correlation for each pixel of the hyperspectral images whilst not including spectral variation that was linearly independent of the target spectrum. In this paper we show the possibility to retrieve specific spectral information with a low magnitude in a complex matrix.

information

hamifera

bacterial-colonization

scattering

feasibility

3

chemometrics

Surface enhanced Raman spectroscopy

Bonnemaisonia hamifera 1

pls

3-Tetrabromo-2-heptanone

red alga-bonnemaisonia

fluorescence

1

Author

Aamer Abbas

University of Gothenburg

Mats Josefson

AstraZeneca R&D

Göran M. Nylund

University of Gothenburg

Henrik Pavia

University of Gothenburg

Katarina Abrahamsson

University of Gothenburg

Analytica Chimica Acta

0003-2670 (ISSN)

Vol. 737 37-44

Subject Categories

Biochemistry and Molecular Biology

Ecology

DOI

10.1016/j.aca.2012.05.047

More information

Latest update

5/10/2021