Measurement of the Solubility of Methyl Salicylate in Aqueous Droplets

Abstract

Measurements of the solubility of methyl salicylate (MS) in aqueous droplets of phosphoric acid and water are reported at 25 C. Solubility values are determined from gravimetric changes in individual droplets as they are introduced to MS vapors. Gravimetric changes in the droplet are measured using an ultrasensitive, electro optical servomechanism that traps single droplets at the center of an electrodynamic focusing field. It is shown that the MS solubility is a function of the solution acid concentration exhibiting a minimum value of 0.11% at an acid concentration of 62% by weight. The solubility increased rapidly for acid concentrations below and above this minimum value. Evidence of MS hydrolysis in individual aqueous droplets is reported for the first time.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1989
Accession Number
ADA208026

Entities

People

  • Glenn O. Rubel

Organizations

  • Edgewood Chemical Biological Center

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  • Human Systems

DTIC Thesaurus Topics

  • Acids
  • Availability
  • Body Weight
  • Classification
  • Conductivity
  • Electric Fields
  • Electrical Conductivity
  • Engineering
  • Equations
  • Kinetics
  • Liquid Phases
  • Measurement
  • Phase
  • Phosphoric Acids
  • Salicylic Acids
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  • Thermodynamics

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  • Analytical Chemistry