Elutriation Procedure and Particle Velocity
15 Questions
2 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Which method is based on the interaction of laser light with particles?

  • Hydrometer method
  • Pipette method
  • X-ray diffraction method
  • Laser light scattering method (correct)

    • Which method is suitable to determine the distribution of particles of respirable size?

  • Turbidimetric method
  • Pressure method
  • X-ray diffraction method
  • Rotating drum method (correct)

    • What is the principle behind the X-ray diffraction method?

  • Specific diffraction pattern from a crystal of material (correct)
  • Light blockage principle
  • Particles deposited on an impaction plate
  • Laser light interaction with particles

    • Which method is very sensitive and used in the identification of polymorphs?

    <p>X-ray diffraction method</p> Signup and view all the answers

    Which method can be used to obtain the size distribution of an aerosol?

    <p>X-ray diffraction method</p> Signup and view all the answers

    Which method is based on the light blockage principle?

    <p>X-ray diffraction method</p> Signup and view all the answers

    In elutriation, what happens to the fluid and the particles?

    <p>Fluid moves vertically upwards and particles move vertically downwards</p> Signup and view all the answers

    What is the main advantage of the Coulter-Current method?

    <p>Fastest counting</p> Signup and view all the answers

    How is the surface method used to determine the mean particle size of a powder?

    <p>By adding air and liquid to the powder, which absorbs liquid and air's mono-molecular layer on its surface</p> Signup and view all the answers

    What is the key feature of the fluid classification method for size analysis of powder?

    <p>It depends on the movement of particles in a fluid</p> Signup and view all the answers

    What happens when a particle travels across the orifice in the Coulter-Current method?

    <p>It displaces its own volume of electrolyte, causing a change in electrical resistance</p> Signup and view all the answers

    What does elutriation involve?

    <p>Movement of fluid opposite to sedimentation</p> Signup and view all the answers

    What is the purpose of using an immersed electrode on either side of the aperture in electronic scanning zone (coulter counter)?

    <p>To measure particle concentration as one particle travels at a time</p> Signup and view all the answers

    What type of suspension flows through a suitable aperture in electronic scanning zone (coulter counter)?

    <p>Particles suspended in electrically conductive fluid</p> Signup and view all the answers

    What is the effect of a particle traveling across the orifice in Coulter-Current method?

    <p>It causes change in electrical resistance</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser