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Full set of Notes with Fill-Ins - San Jose State University

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Chem 155 Unit 14 251 <strong>of</strong> 316A general problem <strong>with</strong> pellets and mulls:A = -log[P/Po]How do you measure Po?You use an open beam to approximate PoSo – the spectra you obtain, are a sum <strong>of</strong>absorbances – the spectra contain:Sample plus window plus mulling oilabsorbance plus reflection losses.IR spectra obtained <strong>with</strong> these sampling methods areuseful for identification, not quantitation:qualitativeThe two pieces <strong>of</strong> information that are useful:Functional group identificationSpectral ‘fingerprinting’Page 251 <strong>of</strong> 316

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