spectroscopy flashcards

How can you find atomic mass from mass spectrometry

The furthest right significant peak at mass spectrometry is the M+ peak, which represents the atomic mass as m/z when z = 1 is equal to m

What is the M+1 peak

A tiny peak 1 above the M+ peak, representing the fragment ions with an extra neutron on the carbon atom

How does a mass spectrometer work

An electron beam knocks 1 electron off each molecule, accelerated through an electromagnetic field, then the amount that the ion was deflected and where it is detected indicates the m/z ratio

What are fragment ion peaks used for

we can use fragments to figure out the overall structure of the molecule like where alkyl branches are

How does an infrared spectrometer work

We fire infrared radiation at the molecules and different bonds absorb the radiation and we can detect which wavenumbers of waves are absorbed which tells us the functional groups present in the moleucle

What ways can bonds vibrate

A bond can stretch or bend

How do greenhouse gases cause the greenhouse effect

The radiation emitted by earth is absorbed by the bonds in greenhouse gases causes the earth to warm by reabsorbing the reemitted radiation

What is the fingerprint region

A section of an infrared spectrum which, using computer analysis, can identify the specific molecule

What is infrared spectroscopy used for

We can analyse air samples to see which pollutants are present

In breathalysers, so it can be detected if there is a certain concentration of alcohol in the breath