Spectroscopy

Question 1

What is AAS?

Answer 1

A lamp of the same element as being analysed shines through flame with sample and detector measures intensity of resultant light. Very similar to colourimetry

Question 2

UV-Vis

Answer 2

Sends monochrome light through a sample and reference cuvette and compares the absorbance. Changes through wavelengths to find electron levels

Question 3

IR Spec

Answer 3

IR Radiation causes covalent bonds to vibrate, Different bonds vibrate at different wave numbers. Useful for identifying functional groups.

Question 4

Mass Spec

Answer 4

Atomises and removes electron from particle to make it charged (can be fragmented), accelerated through an electric field, exposed to a magnetic field depending on mass to charge ratio deflects at different amounts. Detector determines charge to mass ratio.

Question 5

NMR

Answer 5

Radio waves are fired at particles in a magnetic field.