Reading: Chapters\u00a016-18<\/p>\n
Exercises – 16:3, 7, 10,13 17: 3, 18:5 \u00a0Due 4\/11.<\/p>\n
Extra Problem:
\nBoth Raman and FT-IR generally provide similar molecular identification results, so they tend to be competitive. A key advantage of Raman spectrometry is that it requires little or no sample preparation. In fact, samples can even be analyzed without removing them from their packaging materials, such as a glass bottle or plastic bag, making the technique particularly useful in various forensic and pharmaceutical applications.<\/p>\n
Raman instruments have historically been much more expensive than FT-IR instruments because they require high-stability laser sources. Over the past 10 years, however, technology advancements have improved the sensitivity of Raman detectors while costs have dropped substantially.<\/p>\n
In many applications, the extra cost of Raman spectroscopy can easily be justified in productivity savings. The analysis can usually be performed with a probe connected to a long fiber cable that leads back to the instrument, which may be located in a different part of the facility.<\/p>\n
How is it possible to take a Raman spectra through a plastic bag? What type of improved detector technology is making Raman cost effective?<\/p>\n
Resources: \u00a0IR and Raman Database<\/a>, \u00a0http:\/\/www.perkinelmer.com\/CMSResources\/Images\/44-131232BRO_FrontierFTIR.pdf<\/a><\/p>\n http:\/\/www.shimadzu.com\/an\/ftir\/support\/ftirtalk\/index.html<\/a><\/p>\n http:\/\/www.thermoscientific.com\/content\/dam\/tfs\/ATG\/CAD\/CAD%20Documents\/Application%20&%20Technical%20Notes\/Molecular%20Spectroscopy\/FTIR\/FTIR%20Spectrometers\/D10279~.pdf<\/a><\/p>\n http:\/\/www2.ess.ucla.edu\/~schauble\/molecular_vibrations.htm<\/a><\/p>\n