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

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Chem 155 Unit 14 248 <strong>of</strong> 316Strategies used to make IR spectrometry work -1. Poor sources and detectors:use interferometer instead <strong>of</strong> monochromator1. Optics absorb IR light:use mirrors instead <strong>of</strong> lenses2. Materials for transmissive optics:use high-atomic-mass materials <strong>with</strong> weakinter atomic bonds – typical materials are:1. CaF 2 2. ZnSe 3. KBr 4. NaCl3. Sample Handling:use solvents transparent in selected spectralregionsavoid solvents completelyuse reflection-absorption instead <strong>of</strong>transmissionPage 248 <strong>of</strong> 316

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