Figure 3
From: Evaluation of an on-site surface enhanced Raman scattering sensor for benzotriazole
Top: Raman spectra for different concentrations of BTAH measured with the Kaiser system. At the right, the area around \(780\,c{m}^{-1}\) is magnified, showing the evolution of the benzene breathing mode. (a) Pure BTAH as reference. (b–d) Decreasing concentration of BTAH from 1000 over 10 to \(0.1\,mg/l\), respectively. (e) Pure C7 substrate. Bottom: Normalized peak area of the \(783\,c{m}^{-1}\) peak versus concentration of BTAH revealing the limit of detection.
