Topic 2.1 CHM261

What is (2)?

• Monochromator

• Photodetector

• Sample holder

What is Detector?

Converts the ... into a useable signal

What is the commonly source type for UV?

• Deuterium

• Tungsten

• Xenon

• Glowing inert solids

"emit limited number lines of radiation at specific wavelength"

What source is this?

• continuum sources

• line sources

What types of line source?

• hollow cathode lamps and laser

• hollow cathode lamps and tungsten

• electrodesless discharge lamps and glowing inert solids

• electrodeless discharge lamps and hollow cathode lamps

Globar useful for

• Atomic absorption

• Molecular fluorescene

• Molecular absorption

• Scattering

What is sample containers for IR

• Crystalline sodium chloride

• Silicate glass

• Quartz for fused silica

What wavelength selector used that can continuously scan a broad range of wavelegths?

• Filters

• Monochromators

• Polychromator

Two types of filters :

3 types of photon detectors

• i) Photovoltaic cells

  ii) Bolometers

  iii) Pyroelectric transducers

• i) Thermocouples

  ii) Bolometers

  iii) Pyroelectric transducers

• i) Photovoltaic cells

  ii) Silicon photodiodes

  iii) Vacuum phototube

• i) Photomultiplier tubes

  ii) Bolometers

  iii) Photoconductivity transducers