GC-MS is a tandem technique which uses a gas chromatography instrument to separate components of mixtures and then analy

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Gc Ms Is A Tandem Technique Which Uses A Gas Chromatography Instrument To Separate Components Of Mixtures And Then Analy 1 (79.04 KiB) Viewed 28 times

GC-MS is a tandem technique which uses a gas chromatography instrument to separate components of mixtures and then analyzes each component separately by MS techniques. A sample of norborneol contaminated by a small amount of norbomene was analyzed by GC-MS using electron impact (El) ionization. The chromatogram that shows the relative amounts of norborneol and norbornene is shown below. Assuming that the integration (measurement of the area under peak) for the peaks corresponding to norbornene and norborneol is proportional to the molar ratios of these compounds, what is the approximate purity (in mole %) of the norborneol? HINT: Norborneol is more polar than norbornene so the peak for norborneol will have a longer retention time. OE D OA OC TIC:1 D Question 7 Retention time: 4.92 min Integration 1374 units A. 9.6% norborneol B. 10.6 % norborneol C. 89.4 % norborneol D. 90.4% norbomeol E. 95.2 % norborneol 5.73 min 12961 units of 6 to 1 201504 This problem relates to the norborneol/norbornene mixture that was analyzed by LC- MS in the previous problem. The low resolution electron-impact (El) mass spectrum obtained from the peak at 5.73 minutes in the chromatogram shown above is provided below. What is the correct designation for the peak at m/z - 94? 1 6 pts A IM +11+B IM-11+ CIM-231+ DIM-181+ F IM-15H+