Journal
JOURNAL OF CHEMICAL THERMODYNAMICS
Volume 101, Issue -, Pages 84-91Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jct.2016.05.005
Keywords
Pyraclostrobin; Solubility; Solubility parameter; Thermodynamic properties
Categories
Funding
- National Natural Science Foundation of China (NNSFC) [21376164]
- Major National Scientific Instrument Development Project [21527812]
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The solubility of pyraclostrobin in five pure solvents and two binary solvent mixtures was measured from 283.15 K to 308.15 K using a static analytical method. Solubility in five pure solvents was well correlated by the modified Apelblat equation and Wilson model. While the CNIBS/R-K model was applied to correlate the solubility in two binary solvent mixtures, the correlation showed good agreement with experimental results. The solubility of pyraclostrobin reaches its maximum value at a certain cyclohexane mole fraction in the two binary solvent mixtures. The solubility parameter of pyraclostrobin was calculated by the Fedors method and a new modified mixing rule with preferable applicability was proposed to determine the solubility parameter of solvents. Then the co-solvency in the binary solvent mixtures can be explained based on the obtained solubility parameters. In a addition, the dissolution thermodynamic properties were calculated from the experimental values using the Wilson model. (C) 2016 Elsevier Ltd.
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