Naming amines

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Lamps provide the light in the ultraviolet/visible
light spectrophotometer.
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Particular wavelengths of light can be selected
using a monochromator.
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A photodetector receives the light and converts
it into electrical signals.
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A computer analyses the signals from the
photodetector and displays the spectrum on a
screen or chart recorder.
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The light emerging from the monochromator can be
split into two paths using a beam splitter.
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The two beams of light are directed through the
spectrometer using a series of mirrors or lenses.
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The substance under test is dissolved in a
solvent and placed in a glass or quartz
test-tube, called a cuvette.
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A cuvette containing the solvent alone is used as
a reference.
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Light passes from the lamp through the
monochromator. One path takes it through the
solvent in the reference cell to the
photodetector.
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Electrical signals pass to the computer and
recorder.
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The other path takes the light beam through the
dissolved substance in the sample cell to the
photodetector.
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The beam splitter enables the computer to compare
the spectra of light emerging from the sample and
the reference, so that the final spectrum
corresponds to the sample substance alone.
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The beam splitter enables the computer to compare
the spectra of light emerging from the sample and
the reference, so that the final spectrum
corresponds to the sample substance alone.
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