The viability of the application of surface-enhanced resonance Raman spectroscopy (SERRS) to the quantitative analysis of the dye alcian blue 8GX has been examined with the use of citrate- and borohydride-reduced silver colloids. A good linear correlation is observed for the dependence of the SERRS signal intensities at 1344 and 1536cm -1 (R=0.992 and 0.994, respectively) on dye concentrations in the range of 10 -9 -10 -7 M, when using the citrate-reduced silver sol. Likewise, a good linear correlation is also observed for the dependence of the SERRS signal intensities at 1344 and 1536cm -1 (R=0.978 and 0.959, respectively) on dye concentrations in the range 10 -10 -10 -9 M, when using the borohydride-reduced silver sol. At concentrations of dye above 10 -7 M, the concentration dependence of the SERRS signals is nonlinear, almost certainly due to the coverage of the surface of the colloidal silver particles by the dye being in excess of a full monolayer. However, at concentrations of alcian blue greater than 10 -7 M, resonance Raman spectroscopy (RRS) can be employed for quantitative analysis of the dye. When performing RRS, using methanol as an internal standard, we observed a good linear correlation for the dependence of the signal intensities at 1344 and 1536cm -1 (R=0.995 for both bands) on the dye concentration in the 10 -6 -10 -3 M range. The limits of detection of alcian blue by SERRS using a citrate-reduced silver sol, SERRS using a borohydride-reduced silver sol, RRS, and visible absorption spectroscopy are found to be 26 ppb, 203 ppt, 2 ppm, and 0.7 ppm, respectively. Index Headings: Alcian blue; Copper phthalocyanine; Silver sol; Surface-enhanced resonance Raman spectroscopy; SERRS; Resonance Raman spectroscopy; RRS; Quantitative analysis; Internal standard.
Iqbal T. Shadi, Babur Z. Chowdhry, Martin J. Snowden, and Robert Withnall, "Quantitative Detection of Alcian Blue 8GX in the Low Concentration Range Using Surface-Enhanced Resonance Raman Spectroscopy," Appl. Spectrosc. 54, 384-389 (2000)
References are not available for this paper.
OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.