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Relative solubility, stability, and absorptivity of lutein and .beta.-carotene in organic solvents
Abstract
The relative solubility, stability, and absorptivity of lutein and beta-carotene were determined in 18 organic solvents. The solubility of both carotenoids was greatest in tetrahydrofuran, while hexane exhibited the least solubility for lutein; methanol and acetonitrile exhibited the least solubility for beta-carotene. Stability was monitored for 10 days at room temperature by measuring absorbance changes at the wavelength maximum. In the majority of the solvents, initial absorbance decreased by less than 10% during the 10-day period. Degradation was greatest for both carotenoids in cyclohexanone. The relative absorptivities were determined by calculating the carotenoid concentration in a reference solvent using a reference absorptivity, and then Beer's Law was applied to the measured absorbance of the same carotenoid concentration in other organic solvents. Absorbance maxima and relative absorptivities were in good agreement with available literature values.
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The perfluorocarbon chain of PFOS is oleophobic and repels the hydrophobic parts of organic solvents.
“The lower solubility of PFOS in lower polar solvents is contrary to that of hydrocarbon compounds41, indicating that the perfluorocarbon chain of PFOS is oleophobic and repels the hydrophobic parts of organic solvents.”
From Effect of hydro-oleophobic perfluorocarbon chain on interfacial behavior and mechanism of perfluorooctane sulfonate in oil-water mixture (2017) · cites this paper as [41]
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Safafar, H., Van Wagenen, J., Møller, P., & Jacobsen, C. (2015) · Marine Drugs · doi:10.3390/md13127069 · Cited by 478
Production, extraction and stabilization of lutein from microalga Chlorella sorokiniana MB-1
Chen, C.-Y., Jesisca, Hsieh, C., Lee, D.-J., Chang, C.-H., & Chang, J.-S. (2016) · Bioresource Technology · doi:10.1016/j.biortech.2015.10.071 · Cited by 116
Meng, P., Deng, S., Lu, X., Du, Z., Wang, B., Huang, J., Wang, Y., Yu, G., & Xing, B. (2014) · Environmental Science & Technology · doi:10.1021/es504108u · Cited by 103
Meng, P., Deng, S., Du, Z., Wang, B., Huang, J., Wang, Y., Yu, G., & Xing, B. (2017) · Scientific Reports · doi:10.1038/srep44694 · Cited by 34
Metadata
- Authors
- Craft, N. E., & Soares, J. H.
- Venue
- Journal of Agricultural and Food Chemistry
- Publisher
- American Chemical Society (ACS)
- Published
- 1992-03
- Volume
- 40
- Issue
- 3
- Pages
- 431-434
- ISSN
- 0021-8561
- 1520-5118
- Cited by
- 311
- References
- 0
- Language
- en
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