(e) Fragment ion at m/z 58 (base peak). (f) Fragment ion at m/z 120 (base peak). (g) Fragment ions at m/z 100 (base peak), 91, 72, and 44, NH₂
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- The ppm concentration of Pb2+ in a blood sample were measured with Spectrophotometry. 5.00 mL of a blood sample were taken and this sample gave a signal of 0.301 a.u.. Another 5.00 mL of a blood sample were mixed with 0.50 mL og 1.75 ppm Pb2+. Then, this mixture was diluted to 25.00 mL and this diluted mixture gave a signal of 0.406 a.u.. What is the ppm concentration of a blood sample?Figure below is the mass spectra of cyclohexane (CeH₁2). By taking the atomic mass of C=12.00amu and H=1.00 amu. 56 84 AM 80 100 120 100 80- 60- 40- 20- 20 40 a) Identify the the molecular ion peak (M"). Explain. b) Identify the most stable fragment ion in the spectrum. Explain. c) Identify the fragment ion of mass to charge ratio of 27, 41 and 56. m/zQuick help in instrumental analysis b) Specify the molecular ion peak (M+) by plotting a Mass Spectrum for benzene.
- The mass spectrum of an unknown compound has a molecular ion peak with a relative intensity of 54.77% and an M+1 peak of 6.66%. How many carbon atoms are in the compound? (Fill in an integer number)What is the fragment for the base peak at m/z = 29? Deduce and explain the halogen present in the compound. Hence, identify compound B.What mass range or molecular mass range can be detected using GC-MS?
- 5. Use the mass spectrum to propose a molecular formula for the compound. Show your work. 100 80 60 (M)* m/z = 87 intensity = 35% 40 (M+1) m/z = 88 intensity = 2% 20 0.0 0.0 20 40 60 80 100 m/z Rel. IntensityHow do you call the small peak usually found at the the left of the moelcular ion peak in a mass spectra? fragment peak relative abundance peak M+1 peak or isotope peak parent peak or molecular ion peak30. (6) Determine four molecular formulas for a compound with a mass spectrum of 180: 182 (M: M+2) in a 3:1 ratio. (b) Calculate DBEs for each formula.