UV and visible spectroscopy

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  • Created by: J.E.C.
  • Created on: 29-04-14 16:43
How does a spectrometer work?
Light from the source is split into two identical beams and one beam passes through the sample solution, whilst the other passes through pure solvent. The light from the 2 emerging beams is compared to give the absorption spectrum of the sample.
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UV and visible spectra are otherwise known as ___ spectra?
Electronic
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What is plotted on the x axis of a UV or VL spectrum?
Wavelength
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Colorimetry measures the intensity of __ of __ __ over a narrow range of ___?
Absorption, coloured compounds, frequencies.
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The intensity of absorption also depends on __ and __?
The concentration of the solution, distance traveled by light through the solution.
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It is not always possible to make a solution of the coloured compound, in thsis case we would use __ spectroscopy? To do this we...? This pectrum will therefore represent the ___ not ___ by the pigment?
Reflectance. Shine a light on to the surface of the painted object and examine the compostion of the relfected light. Colour not absorbed
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Other cards in this set

Card 2

Front

UV and visible spectra are otherwise known as ___ spectra?

Back

Electronic

Card 3

Front

What is plotted on the x axis of a UV or VL spectrum?

Back

Preview of the front of card 3

Card 4

Front

Colorimetry measures the intensity of __ of __ __ over a narrow range of ___?

Back

Preview of the front of card 4

Card 5

Front

The intensity of absorption also depends on __ and __?

Back

Preview of the front of card 5
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