Consider a reflection measurement using a fiber guided light source but performed in ambient room lighting. In this case, even if a perfectly black sample is being measured, room light would enter the input fiber. Blocking the input fiber would block all light and fail to take this background light into account, resulting in a perfectly black sample still showing some reflection since the ambient room lighting would be interpreted as coming from the sample. When taking a background spectrum, only reference light should be prevented from entering the spectrometer; in this case, the fiber guided light source should be switched off when taking a background spectrum to account for the background lighting.
Mass Spectrometry Tutorial
Prepared at the University of Arizona. Many instructive problems are provided.
Modern Methods of Mass Spectrometry
An excellent introduction to modern methods of mass spectrometry from University of Leeds.
NMR Tutorial and Spectroscopy Problems
Prepared at Imperial College. A more advanced tutorial than that provided in this text. The associated problems all involve nmr spectroscopy, but also use data from infrared and mass spectrometry.
NMR Spectroscopy-A Virtual Text
Prepared by Joseph Hornak, Rochester Institute of Technology. An exceptional introduction to modern nmr spectroscopy. More advanced than this text.
NMR meets Musicians
A clever and informative site from the University of Erlangen-Nuremberg, Institute of Organic Chemistry
A useful site providing information for NMR, IR and mass spectroscopy. Created at the University of Potsdam.
More Spectroscopy Tools
A nice collection of applications for interpreting NMR, IR and mass spectra. Created at Colby College.
Spectra Data Base
A large and very useful collection of MS, NMR, IR, Raman & ESR spectra. This page is hosted by SDBS, Japan.
Spectroscopy Problems 64 Graded Problems Compiled at Notre Dame. A very nice collection of problems using all the spectroscopy methods discussed here. 72 Graded Problems Compiled at UCLA. An outstanding collection of unknowns requiring the interpretation of nmr spectra & some ir. Solutions are provided. A general discussion of nmr and its uses is given. Some advanced techniques not discussed in this text are used. Infrared Spectroscopy Problems Prepared at Colby College. This is the Netscape version.