SEM-EDX Analysis of Insulator Specimens by Diluted Ionic Liquid —Application to Volcanic Particles—

Long Ze, Susumu Imashuku, Jun Kawai, Daisuke Miki, Susumu Tohno

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Ethanol diluted (1 wt%) ionic liquid 1-ethyl-3-methylimidazolium acetate is used in order to avoid the charge-up of insulator specimen for scanning electron microscope (SEM) analysis. SEM-EDX analysis is additionally performed for the specimen treated by the ethanol diluted ionic liquid. As an example of the insulator specimen, we analyze volcanic ash particles, and succeed to discriminate the elemental composition difference of a specimen surface within 10 μm2micro area. Though a clear secondary electron image of the volcanic ash particle of which diameter is less than 10 μm can be obtained without electric conductive treatment, particles of diameter larger than 20 μm are needed to be treated by the diluted ionic liquid to avoid the charge-up effects.

Original languageEnglish
Pages (from-to)947-951
Number of pages5
Issue number11
Publication statusPublished - 2012
Externally publishedYes


  • diluted ionic liquid
  • insulator
  • micro area
  • volcanic particle

ASJC Scopus subject areas

  • Analytical Chemistry


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