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Related Experiment Videos

Effects of fluid composition on mist composition.

Eugene M White1, William E Lucke

  • 1Milacron Marketing Company, Cincinnati, OH, USA.

Applied Occupational and Environmental Hygiene
|October 14, 2003
PubMed
Summary
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Synthetic metalworking fluid mists were analyzed. Sparged mists contained more short-chain fatty acids, and collection methods impacted acid recovery, with dodecanedioic acid showing stability over time.

Area of Science:

  • Environmental Chemistry
  • Occupational Health
  • Industrial Hygiene

Background:

  • Metalworking fluids (MWFs) generate mists during use, posing potential inhalation risks.
  • Understanding the composition and generation of MWF mists is crucial for workplace safety.
  • Contaminants like tramp oils can influence misting behavior in water-based MWFs.

Purpose of the Study:

  • To compare short-chain fatty acid (SCFA) content in synthetic MWF mists generated by nebulization versus air sparging.
  • To evaluate the stability and recovery of SCFAs collected from MWF mists using different sampling methods.
  • To investigate the effect of tramp oil contamination on the misting potential of various MWF types.

Main Methods:

  • Laboratory generation of synthetic MWF mists using nebulization and air sparging.

Related Experiment Videos

  • In situ trimethylsilyl derivatization for determination of SCFA species.
  • Collection of mists using resin cartridges and filters, followed by quantitative analysis.
  • Assessment of misting potential in water-based, soluble, semi-synthetic, and synthetic MWFs with and without tramp oil.

    • Main Results:

    • Air sparging generated significantly higher amounts of neodecanoic, nonanoic, and dodecanedioic acids compared to nebulization.
    • Significant losses of octanoic and isononanoic acids occurred over 8 hours of filter collection; dodecanedioic acid remained stable over 22 hours.
    • Tramp oil contamination increased the misting potential of water-based MWFs but had a lesser effect on synthetic MWFs compared to soluble and semi-synthetic fluids.

    Conclusions:

    • The method of mist generation (sparging vs. nebulization) influences the SCFA profile of synthetic MWF mists.
    • Sampling duration and collection media (filter vs. resin) critically affect the accurate quantification of specific SCFAs in MWF mists.
    • Synthetic MWFs exhibit lower misting potential when contaminated with tramp oils compared to other MWF formulations.