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. 2023 May 30;8(23):20675–20683. doi: 10.1021/acsomega.3c01241

Table 2. Vibrational Bands Present in the SERS Spectra of Each Colorant-Specific Dyed Hair That Can Be Used for Hair Colorant Identification.

colorant corresponding vibrational bands present in SERS spectra (cm–1)
PBA 496, 582, 736, 761, 950, 1318, 1433, 1511, 1589
PBU 439, 460, 685, 736, 761, 1025, 1158, 1318, 1511, 1589, 1645
SBA 460, 582, 685, 1025, 1158, 1296, 1348, 1511, 1645
SBU 460, 582, 736, 1053, 1158, 1318, 1399, 1589, 1645