Spectrophotometry Fundamentals

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Questions and Answers

What is the purpose of a reference cuvette in spectrophotometry?

  • To dilute the samples
  • To clean the samples
  • To calibrate the instrument (correct)
  • To heat the samples

In spectrophotometry, what does the Beer-Lambert law describe?

  • The relationship between pressure and weight
  • The relationship between light intensity and absorbance (correct)
  • The relationship between temperature and volume
  • The relationship between color and density

What is the purpose of a monochromator in a spectrophotometer?

  • To adjust the temperature
  • To amplify the signal
  • To mix different wavelengths
  • To filter out unwanted light (correct)

Which type of sample is unsuitable for analysis using a spectrophotometer?

<p>Opaque (C)</p> Signup and view all the answers

What is the relationship between absorbance and concentration in spectrophotometry?

<p>Directly proportional (C)</p> Signup and view all the answers

What is one function that a spectrophotometer cannot perform?

<p>Determine sample temperature (C)</p> Signup and view all the answers

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Study Notes

Absorbance

  • In spectrophotometry, a reference cuvette is used to calibrate the instrument.
  • The Beer-Lambert law describes the relationship between light intensity and absorbance.
  • A monochromator in a spectrophotometer filters out unwanted light.
  • Opaque samples are unsuitable for analysis using a spectrophotometer.
  • Absorbance and concentration have a direct proportional relationship in spectrophotometry.

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