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Particle Size Distribution & Analysis Introduction

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Particle Size Distribution & Analysis Introduction

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Questions and Answers

What is the surface diameter of a particle?

The diameter of a sphere with the same sedimentation rate as the particle

The diameter of a sphere with the same volume as the particle

The average diameter of particles in a powder sample

The diameter of a sphere with the same surface area as the particle (correct)

Which type of diameter is used when analyzing powders used for suspension?

Surface diameter

Average diameter

Sedimentation diameter (correct)

Volume diameter

In microscopy, what is the optical size range for particle size analysis?

0.01-1 µm

0.5-100 µm (correct)

1-10 µm

10-50 µm

What method is used to determine the particle size range through electronic means?

Electronic determination of PS (Coulter counter) Signup and view all the answers

What is the main purpose for using stoke's diameter in particle size analysis?

Measuring sedimentation rate Signup and view all the answers

When analyzing powders for pharmacological action after dissolution and absorption, which diameter is typically used?

Volume diameter Signup and view all the answers

What is the sedimentation diameter used to describe in particle size analysis?

Sedimentation rate of a particle Signup and view all the answers

In microscopy for particle size analysis, how is the sample prepared?

Prepared as a slurry in a liquid dispersion medium Signup and view all the answers

What determines the type of expressed diameter used in particle size analysis?

The method used to determine the diameter Signup and view all the answers

What does volume diameter represent in particle size analysis?

The size of a sphere with the same volume as a particle Signup and view all the answers