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  • 1 Department of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, Shaanxi, People’s Republic of China
  • 2 College of Science, Northwest A&F University, Yangling 712100, Shaanxi, People’s Republic of China
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Abstract

In this article, the enthalpy of dissolution for oxymatrine in 0.15 M citric acid solution is measured using a RD496-2000 Calvet Microcalorimeter at 36.5 °C under atmospheric pressure. The differential enthalpy (ΔdifHm) and molar enthalpy (ΔsolHm) were determined for oxymatrine dissolution in 0.15 M citric acid solution. On the basis of these experimental data and calculated results, the kinetic equation, half-life, ΔsolHm, ΔsolGm, and ΔsolSm of the dissolution process were also obtained.

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