SPECTROPHOTOMETER Flashcards
1
Q
Spectrophotometer parts
A
- Source of radiation
- Wavelength selector
- Sample cell
- Radiation detector
- Signal processor and readout
2
Q
Source of radiation
A
- Continuum sources
- Line sources
3
Q
Source of radiation
Continuum sources
A
- Deuterium lamp
- Tungsten lamp
- Nernst glower
4
Q
Source of radiation
Line sources
A
Hollow cathode
5
Q
Isolates a restricted region of the spectrum
A
Wavelength selector
6
Q
Wavelength selector
A
- Filters
- Monochromators
7
Q
Wavelength selector
Dedicated to a single band of wavelength
A
Filters
8
Q
Wavelength selector
designed for spectral scanning (ex: prisms, gratings)
A
Monochromators
9
Q
Holds the sample to be analyzed
A
Sample cell
10
Q
Sample cell
A
- Quartz cuvette
- Silicate glass or plastic cell
- NaCl or KBr plates
11
Q
Sample cell
Quartz cuvette
A
UV or Visible region
12
Q
Sample cell
Silicate glass or plastic cell
A
Visible region
13
Q
Sample cell
NaCl or KBr plates
A
IR region
14
Q
Converts radiant energy into a usable electrical signal
A
Radiation detector
15
Q
Radiation detector
A
- Phototubes
- Photomultipliers
- Photodiodes
