2444-091611

2444-091611 - QUIZ Avg. 2 15.0 / 25 Stnd. Dev. 5.8 Exam 1....

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QUIZ 2 Avg. 15.0 / 25 Stnd. Dev. 5.8 Exam 1. Wed. 09/21 7:30 - 9:30 A120 and A203 A - M in A120 N - Z in A203
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Peak Areas and Integration: Counting Hydrogen Ratios An NMR spectrum containing four signals representing four different types of hydrogen atoms. Four signals - four different protons Integrate the area under each peak, which should be proportional to the number of hydrogen atoms. The larger the peak area, the larger the number of hydrogen atoms Integration of Peak Area, and Counting Hydrogens
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Using an arcane system, there are horizontal line traces along with the proton peaks. If we measure the height of these traces, beginning where the peak starts and ending where the peak stops, we obtain a number that correlates with the peak area. Integration of the peak area in this way gives the ratio of one peak to another, if all peaks are divided by the smaller value. Modern instruments digitally integrate the peaks and display the ratio. Integrating each signal
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Peak A integrates for 26 mm , peak B for 9.2 mm , peak C for 9.1 mm , and peak D for 9.7 mm . If we divide everything by the smallest integration (9.1 units), we obtain a ratio of
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This note was uploaded on 02/25/2012 for the course CHEM 244 taught by Professor Jardin,j during the Fall '08 term at UConn.

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2444-091611 - QUIZ Avg. 2 15.0 / 25 Stnd. Dev. 5.8 Exam 1....

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