{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

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

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
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
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
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
Background image of page 2
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
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
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
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}