Review Article
Microanalysis of Organic Pigments in Ancient Textiles by Surface-Enhanced Raman Scattering on Agar Gel Matrices
Figure 4
SERS spectra (514 nm excitation) obtained from the dried beads after extraction of the red dye from a pre-Columbian textile sample with Ag-agar gel spiked either with ethanol or disodium-EDTA solution ((a) and (b), resp.) or from reference alizarin solutions in ethanol (c). (d) The textile sample is shown with a 25 mm ruler on top; the 5 mm dimension agar gel bead is placed close to the ruler.
(a) |
(b) |
(c) |
(d) |