Test 2

Mass spectrometry

100

Mass spectrometers separate ions based on....

mass-to-charge ratio

200

This has 4 poles of oscillating current.

Quadrupole

300

Time-of-flight MS separates electrons as they travel through a....

drift tube

400

The analyzer is responsible for....

ion sorting

500

In an electron multiplier, when an electron hits a ________, a burst of electrons is emitted, which then move on to the next dynode, further increasing the number of electrons.

dynode

ICP-MS

100

Function of the ICP for the ICPMS

Atomizer and ionizer

200

Ionic species in the plasma that have the same m/z as the analyte ion

Spectroscopic interferences

300

Solid samples can be introduced by.....

laser ablation

400

Due to matrix effects

non-spectroscopic interferences

500

Area in the ICP-MS where there is a raid expansion of gas, causing cooling

Expansion stage

X-Ray spectroscopy

100

When high-energy electrons bombard an atom, electrons from one of these shells are removed?

K or L shells

200

Type of x-ray spectroscopy that uses scattering to determine the structure of a crystal.

Diffraction

300

Can be used for all elements greater than....

sodium, Na

400

Name the type of source that is made up of a tube that is under vacuum and contains a tungsten filament and an anode. 

x-ray tube

500

Type of x-ray spectroscopy that provides detailed chemical and physical information about the elements.

X-ray absorption fine structure spectroscopy (XAFS)

UV-Vis

100

Name for A = abc

Beer's Law

200

Name for a functional group that absorbs UV-Vis radiation

chromophore

300

What is the main disadvantage of a single-beam instrument?

Have to irradiate sample and reference cells separately

400

What type of instrument uses radiation from the source is split into two beams that simultaneously pass through he reference and sample cells and then strike two separate photodetectors

double-beam-in-space

500

₀In the formula lnP₀/P = mu*x , what are P₀ and P

P₀ = power of incident beam, P = power of radiation after passing through sample

IR and Raman

100

what is the units for the x-axis in an IR spectrum?

wavenumber

200

Which property of a molecule must change for a Raman mode to be active?

Polarizability

300

Name one way Raman and IR spectra are dissimilar.

the relative intensities of the bands are different 

some peaks may be active in one but not the other

400

What is the name for the type of scattering that occurs when an electron is excited to a virtual state, j, and then returns back down to the ground state?

Rayleigh scattering

500

Why can't water be used as a solvent in IR?

Because it absorbs in a large portion of the UV-Vis spectra and will obscure analyte bands