In mass spectrometry, the substance with a 1+ charge and a mass equal to the molar mass of an organic compound is called the A) base peak. B) fragment ion. C) molecular ion.
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- In a mass spectrum, what m/z value would correspond to the fragment shown below?Explain why electrospray ionization in mass spectrometry often results in detection of only the parent ion peak for a molecule, and why the detected ions are often 1 mass unit greater than 8. mass of the molecule.What is the difference between molecular ion peak and base peak.
- Why is mass spectrometry called so, not as spectrometry?In mass spectrometry, the molecular ion peak occurs at O A. the largest m/z value. O B. the smallest m/z value. O C. the m/z value of the most abundant ion. O D. an m/z value equal to the molecular weight of the sample molecule.1. Which one of the given compounds is consistent with the mass spectrum below? 100 40 20 10 20 25 30 35 40 5o 55 45 60 65 70 75 m/z Courtesy of SDBS: National Institute of Advanced Industrial Science and Technology A. CH,CH,CH(CH,), В. CH,CHOHCH,CH, C. CH,CH,OCH,CH, D. CH,CH,NHCH,CH, E. CH,CH,CH,CH, Relative htensity
- 1. What is the molecular ion peak in a mass spec represent? 2. What is the base peak in the mass spec? 3. In the space below differentiate between a mass spec of a compound with one chlorine and a compound with one bromine. Chlorine BromineConsider the following molecule, draw the structure of the fragment that you would expect to be the base peak in the MS. .. NN []n ? HOCX D Marvin JS by ChemAxon H C N O SF P CI Br Open in ReHow can I interperet this mass spectrometry?
- Consider the mass spectrum below. 100 80- 60- 20 0.0- 0.0 60 100 miz SDBS, National Institute of Advanced Industrial Science and Technology Which peak is the molecular ion? Choose one OA OB OD. OGThe absorbance of sample A is higher than the absorbance of sample B. Therefore, sample A has (circle the correct one) more / less dissolved solute than sample B. The absorbance is (circle the correct one) directly / inversely related to the transmittance of a sample.Benzoic acid produced which of the following mass spectra? Unknown A Unknown B MASS SPECTRUM 100 MASS SPECTRUM 100 80 80 60 60 40 40 20- 20- 0.0 0.04 20 0.0 40 120 - 80 m/z 160 40 60 a0 .m/z 100 120 140 NIST Chemistry WebBook (http://webbook.nist.gov/chemistry) NIST Chemistry WebBook thetp://webbook.rist.goulchemistry) Unknown D Unknown C MASS SPECTRUM MASS SPECTRUM 100 100 80 80 60 60 40 40 20 20 0.0 0.0 20 40 60 80 100 120 0.0 40 80 120 160 200 m/z m/z NIST Chemistry WebBook (http://webbook.nist.gov/chemistry) NIST Chemistry Weblook thetp//webbook.rist.govichemistry) Re htensty Rel. Intensity