SPECTROPHOTOMETER

Question 1

Spectrophotometer parts

Answer 1

1. Source of radiation
2. Wavelength selector
3. Sample cell
4. Radiation detector
5. Signal processor and readout

Question 2

Source of radiation

Answer 2

1. Continuum sources
2. Line sources

Question 3

Source of radiation

Continuum sources

Answer 3

1. Deuterium lamp
2. Tungsten lamp
3. Nernst glower

Question 4

Source of radiation

Line sources

Answer 4

Hollow cathode

Question 5

Isolates a restricted region of the spectrum

Answer 5

Wavelength selector

Question 6

Wavelength selector

Answer 6

1. Filters
2. Monochromators

Question 7

Wavelength selector

Dedicated to a single band of wavelength

Answer 7

Filters

Question 8

Wavelength selector

designed for spectral scanning (ex: prisms, gratings)

Answer 8

Monochromators

Question 9

Holds the sample to be analyzed

Answer 9

Sample cell

Question 10

Sample cell

Answer 10

1. Quartz cuvette
2. Silicate glass or plastic cell
3. NaCl or KBr plates

Question 11

Sample cell

Quartz cuvette

Answer 11

UV or Visible region

Question 12

Sample cell

Silicate glass or plastic cell

Answer 12

Visible region

Question 13

Sample cell

NaCl or KBr plates

Answer 13

IR region

Question 14

Converts radiant energy into a usable electrical signal

Answer 14

Radiation detector

Question 15

Radiation detector

Answer 15

1. Phototubes
2. Photomultipliers
3. Photodiodes

Question 16

Radiation detector

More sensitive radiation detector

Answer 16

Photodiodes

Question 17

Displays the transduced electrical signal into numbers

Answer 17

Signal processor and readout