Unit 2 Analytical techniques
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State two types of analytical techniques
Mass spec and Infra red spectroscopy
What is the name of the process by which molecular ions are broken up into ions with smaller molecular mass
The process is called fragmentation
what peak is at the far right of a mass spectrum
The molecular ion peak, if you add a hydrogen atom to the peak you will get the relative molecular mass of the original molecule
what is the difference between low and high resolution mass spec
High resolution records the masses to a higher accuracy, by including more significant figures. Whereas, low resolution mass spectrometry records the mass to the nearest whole number
Describe what happens in a infra-red spectrometer
A beam of infra-red light is passed through a sample, the radiation that emerges has some frequencies missing that correspond to the bonds found in the sample. A graph of transmittance against frequency is then plotted.
Define the fingerprint region
The area on an infra-red spectrum between 500-1500cm-1 which contains a series of complex vibrations that is unique to each molecule.