Basic Principles of Instrumentation in Analytical Chemistry
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Questions and Answers

What is the unit of frequency?

  • Cycles/second or s-1 or Hertz (Hz) (correct)
  • Meters (m)
  • Joules (J)
  • Centimeters (cm)

    • What is the characteristic used to measure the distance between two waves of light?

  • Frequency (ν)
  • Wavenumber
  • Energy (E)
  • Wavelength (λ) (correct)

    • What carries the energy in electromagnetic radiation?

  • Photons (correct)
  • Protons
  • Electrons
  • Neutrons

    • Which property characterizes the number of waves per centimeter in electromagnetic radiation?

    <p>Wavenumber</p> Signup and view all the answers

    What is the primary purpose of chromatography?

    <p>Separation, identification, and purification of components of a mixture</p> Signup and view all the answers

    What is the formula to calculate energy carried by a photon?

    <p>E = hν</p> Signup and view all the answers

    Which substances can be separated using chromatography?

    <p>Pigments, dyes, amino acids, vitamins, polymers</p> Signup and view all the answers

    Who is credited with inventing and naming liquid chromatography?

    <p>Mikhail Tswett</p> Signup and view all the answers

    What does the term 'chromatography' mean?

    <p>'Color Writing'</p> Signup and view all the answers

    What is the definition of chromatography?

    <p>'A technique for separating mixtures into their components in order to analyze, identify, purify and/or quantify the mixture or components'</p> Signup and view all the answers

    Study Notes

    Instrumental Analysis

    • In instrumental analysis, a physical property of a substance is measured to determine its chemical composition.

    Goals of Analysis

    • The goal of analysis is to provide information about the composition of the sample, which is called quantitative analysis.

    Types of Analytical Methods

    • There are three categories of analytical methods:
      • Chemical methods
      • Instrumental methods
      • Chromatography methods

    Types of Chemical Analysis

    • There are two types of chemical analysis:

    Qualitative Analysis

    • Refers to identifying the product, yielding useful clues about the molecular or atomic species, structural features, or functional groups in the sample.

    Quantitative Analysis

    • Refers to determining the purity of the product, providing numerical data corresponding to the concentration of the analyte.
    • This type of analysis is done using instruments.

    Choosing an Instrument

    • The choice of instrument depends on the property being measured.

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    Quiz Team

    Description

    Learn about the fundamental principles of using instruments to measure the physical properties of substances for the purpose of determining their chemical composition. Explore the different types of analytical methods and their applications in biochemical, inorganic, organic, and physical analyses.

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