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Exp 5 - FT IR copy

Exp 5 - FT IR copy - CHE 226-001 Experiment 5 Determination...

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CHE 226-001 Experiment 5 Determination of Forgery Documents Using FT-Infrared Spectroscopy Pre-Lab Questions 1. The process is started when the source emits infrared rays, and then the collimator directs the waves and narrows them. Once the waves pass through the sample, the molecules begin to vibrate in specific, recordable ways. Lastly, a detector can record, interpret, and graph the changes made by these vibrations. 2. Paint from older and modern times have different types of organic compounds that can be detected by a FT-IR machine. The IR graphs from the unknown sample and a modern paint sample can be used to determine if the unknown paint is old or new through analysis of the types of peaks present in the graph. An older paint will contain peaks that represent different compounds, such as: barium, ferric oxide, lead, and zinc oxide. Procedures The purpose of this experiment is to determine the composition of paint samples using Fourier transform infrared spectroscopy. This experiment will give an understanding of how FT-
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