We gratefully acknowledge contributions from the following publishers for certain IR-spectra.
The following IR-spectra were reprinted from Merck FT-IR Atlas through courtesy of WILEY-VCH, STM-Copyright & Licenses, Weinheim, Germany: 452, 455, 525, 532, 564, 578, 593, 602, 616, 621, 622, 623, 632 and 633.
The following IR-spectra are reprinted from the Food Chemicals Codex, 4th Edition. Copyright 1996 by the National Academy of Sciences. Courtesy of the National Academy Press, Washington, D.C.: 476 and 551.