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Questions and Answers
What is the purpose of a reference cuvette in spectrophotometry?
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?
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?
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?
Which type of sample is unsuitable for analysis using a spectrophotometer?
What is the relationship between absorbance and concentration in spectrophotometry?
What is the relationship between absorbance and concentration in spectrophotometry?
What is one function that a spectrophotometer cannot perform?
What is one function that a spectrophotometer cannot perform?
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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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