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Solubility of (+)-Usnic Acid in Water, Ethanol, Acetone, Ethyl Acetate and n-Hexane

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Abstract

Using ultraviolet spectrophotometry, the solubility of (+)-usnic acid in water, ethanol, acetone, ethyl acetate and n-hexane were measured at temperatures from (278.15 to 338.15) K at atmospheric pressure. The results obtained led to the solubility order: ethyl acetate > acetone > n-hexane > ethanol > water. The solubility values were correlated with the Apelblat equation, the λh equation and the ideal model. The results showed that these three models agreed well with the experimental data.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (Grant Nos. 30873194, 21172177 and 81001421) and the Natural Science Foundation of Shaanxi Province (2012K14-05-03).

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Authors and Affiliations

  1. School of Science, Xi’an Jiaotong University, No. 28 Xianning Westroad, Xi’an, 710049, Shaanxi, People’s Republic of China

    Ju-qing Jin & Yong Rao

  2. School of Medicine, Xi’an Jiaotong University, No. 76 Yanta Westroad, Xi’an, 710061, Shaanxi, People’s Republic of China

    Xiao-li Bian, Ai-guo Zeng & Guang-de Yang

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  1. Ju-qing Jin
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  2. Yong Rao
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  3. Xiao-li Bian
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  4. Ai-guo Zeng
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  5. Guang-de Yang
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Correspondence to Guang-de Yang.

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Jin, Jq., Rao, Y., Bian, Xl. et al. Solubility of (+)-Usnic Acid in Water, Ethanol, Acetone, Ethyl Acetate and n-Hexane. J Solution Chem 42, 1018–1027 (2013). https://doi.org/10.1007/s10953-013-0010-1

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  • DOI: https://doi.org/10.1007/s10953-013-0010-1

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