Analytical Techniques Flashcards
What is mass spectrometry used to measure?
Relative atomic masses of atoms and relative molecular mass of organic compounds
What are organic compounds?
(Generally) compounds that contain carbon
What is the charge of ions formed in a mass spectrometer meant to be?
1+
Give an example of application of the mass spectrometer?
Drug testing; especially in the case of urine samples in athletes (other suitable examples are expectable obviously :P )
What is C2H5OH+ known as? (assume numbers are in subscript)
A molecular ion
When molecular ions break up into ions of smaller molecular mass this is known as (…)?
Fragmentation
What does the main peak furthest to the right in a mass spectrum represent?
Molecular ion mass/relative atomic mass
What is the peak furthest to the right in the mass spectrum called?
Molecular ion peak
What is high resolution useful in measuring?
Parent ion’s molecular formula
What does a high resolution mass spectrometer take into account?
That the relative atomic masses of elements are not exactly a whole number (except in the case of carbon-12)
What would you use to distinguish between molecules that seem to have the same mass number when the elements relative masses used previously were whole numbers? (e.g. oxygen = 16)
High resolution mass spectrometry
How are substances separated before they are placed into a mass spectrometer?
Chromatography
What does IR stand for?
Infra-red
What is infra-red spectroscopy used for?
Identifying organic compounds (based on the wavelength absorbed by the bonds)
Do strong bonds vibrate at a lower or higher frequency?
Higher frequency
