Abstract
A quantitative method is reported for the estimation of glycerol during transesterification of oil to form biodiesel. The reagent used to derivatize glycerol was 9,9-dimethoxyfluorene. Glycerol is estimated by both UV–visible spectrophotometric and high performance liquid chromatography methods. Using the former method, detection limits of 0.05% w/w of glycerol in biodiesel was established. Validation of the developed method was done using the Greenhill method for determination of free glycerol formed during the transesterification reaction.
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Abbreviations
- ASTM:
-
American Society for Testing and Materials
- ATR-FTIR:
-
Attenuated total reflectance-Fourier transform infrared
- CCDC:
-
Cambridge Crystallographic Data Collection
- CE:
-
Capillary electrophoresis
- FAME:
-
Fatty acid methyl esters
- FID:
-
Flame ionization detection
- HPLC:
-
High performance liquid chromatography
- HTGC:
-
High temperature capillary gas chromatography
- NIR:
-
Near infrared spectroscopy
- PTSA:
-
p-Toluenesulfonic acid
- SEC:
-
Size exclusion chromatography
- TG:
-
Triglycerides
- TLC:
-
Thin layer chromatography
- mp.:
-
Melting point
- NMR:
-
Nuclear magnetic resonance
- HRMS:
-
High resolution mass spectra
- RT:
-
Retention time
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Acknowledgments
Funding from the Department of Science and Technology (DST), Government of India is gratefully acknowledged. The authors thank the Sophisticated Analytical Instrumentation Facility (SAIF), Indian Institute of Technology Madras and Dr. Babu Varghese for the X-ray data collection. The authors also acknowledge valuable suggestions received during the drafting stage from Professor R. Ravi and G. Ravikumar.
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An erratum to this article can be found at http://dx.doi.org/10.1007/s11746-010-1570-5
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Reddy, S.R., Titu, D. & Chadha, A. A Novel Method for Monitoring the Transesterification Reaction of Oil in Biodiesel Production by Estimation of Glycerol. J Am Oil Chem Soc 87, 747–754 (2010). https://doi.org/10.1007/s11746-010-1549-2
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DOI: https://doi.org/10.1007/s11746-010-1549-2