Fig. 4From: Compositional Analysis of Ternary and Binary Chemical Mixtures by Surface-Enhanced Raman Scattering at Trace Levels a Typical SERS spectrum of 5 × 10−5 M 2-CB, 3- CB, and 4- CB. b Typical SERS spectra of CB mixtures B1 and B2. c 2-CB, 3-CB, 4-CB, and their mixtures’ scores. d Average scores of 2-CB, 3-CB, 4-CB, and their mixtures corresponding to the first two principal componentsBack to article page