A technique in which all frequencies are examined simultaneously
Fourier Transform Infrared
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What does a monochromator do?
Splits light into its individual frequencies so they can be measured one at a time
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When does the molecule absorb infrared radiation?
When the frequency of a vibration is equal to the frequency of the IR radiation
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How do you prepare a vapour phase sample?
Introduce it to a special cell and add 10cm NaCl
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How do you prepare a liquid sample?
Squeeze between flat plates of sodium chloride
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How do you prepare a solid sample?
Combine with Nujol to create a mull then sandwich between KBr pellets
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What is the wavelength calibrator?
Polystyrene film
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Which sampling technique uses a curved mirror to reflect all radiation diffusely reflected from a surface and focuses it onto the detector?
Diffuse reflectance
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Which sampling technique involves the sample being placed in direct contact with an optically flat crystal so a correct IR angle will allow total internal reflection?
Attenuated Total Reflectance
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What is retardation?
When the path length of the beam splitter to fixed mirror and to the movable mirror vary and may not always be in phase
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As reduce mass decreases _______
stretching frequency decreases
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As bond order increases ________
stretching frequency increases
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Other cards in this set
Card 2
Front
What does a monochromator do?
Back
Splits light into its individual frequencies so they can be measured one at a time
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