Elutriation Procedure and Particle Velocity

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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?

X-ray diffraction method Signup and view all the answers

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

X-ray diffraction method Signup and view all the answers

Which method is based on the light blockage principle?

X-ray diffraction method Signup and view all the answers

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

Fluid moves vertically upwards and particles move vertically downwards Signup and view all the answers

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

Fastest counting Signup and view all the answers

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

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

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

It depends on the movement of particles in a fluid Signup and view all the answers

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

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

What does elutriation involve?

Movement of fluid opposite to sedimentation 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)?

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

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

Particles suspended in electrically conductive fluid Signup and view all the answers

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

It causes change in electrical resistance Signup and view all the answers

Elutriation Procedure and Particle Velocity

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Questions and Answers

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

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

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

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

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

Which method is based on the light blockage principle?

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

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

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

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

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

What does elutriation involve?

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

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

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

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