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Immersion liquid techniques in solid particle characterization: A review.

Ilpo Niskanen1, Kenichi Hibino2, Jukka Räty3

  • 1Oulu Mining School, University of Oulu, P.O. Box 3000, FI-90014 Oulu, Finland; National Institute of Advanced Industrial Science and Technology (AIST), Central 3, 1-1-Umezone, Tsukuba, Ibaraki 305-8563, Japan.

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Summary
This summary is machine-generated.

This review details non-imaging immersion matching techniques for determining the refractive index of small particles. These methods are crucial for quality control in industrial particle suspensions and colloids.

Keywords:
ConcentrationImmersion liquid methodMineral particlePigmentPurity testingRefractive index

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Area of Science:

  • Materials Science
  • Optical Physics
  • Colloid Science

Background:

  • Small solid particles with tailored chemical, physical, and optical properties are integral to everyday products like paper and cosmetics.
  • Microscopy is a key tool for characterizing particles, providing data on size, shape, and refractive index.
  • The immersion liquid method is a common technique for refractive index determination using microscopes.

Purpose of the Study:

  • To provide a comprehensive overview of non-imaging immersion matching techniques for refractive index determination.
  • To describe the basic features, benefits, and limitations of each presented technique.
  • To illustrate potential applications in industrial quality monitoring of particle suspensions and colloids.

Main Methods:

  • Overview of immersion liquid set methods.
  • Discussion of temperature and wavelength variation techniques.
  • Explanation of double variation and liquid evaporation methods.

Main Results:

  • Detailed description of various non-imaging immersion matching techniques.
  • Comparative analysis of the advantages and disadvantages of each method.
  • Identification of practical applications for quality control.

Conclusions:

  • Non-imaging immersion matching techniques offer valuable approaches for particle refractive index determination.
  • These methods are applicable to quality monitoring of industrial particle suspensions and colloids.
  • Understanding the features, benefits, and limitations of each technique is essential for effective application.