Determination of the iodine value of biodiesel using 1H NMR with 1,4-dioxane as an internal standard

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2010
Author
Oromí Farrús, Mireia
Villorbina Noguera, Gemma
Eras i Joli, Jordi
Gatius Cortiella, Ferran
Torres i Grifo, Mercè
Canela i Garayoa, Ramon
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Abstract
Iodine values (IVs) of some biodiesel samples were analyzed using both 1H NMR and a standard iodometric method. 1H NMR was carried out with and without 1,4-dioxane as an internal standard (IS). The results obtained using 1H NMR with 1,4-dioxane as an internal standard showed better linear fitting and
correlation with the iodometric method than NMR without the IS. The proposed 1H NMR_IS method allows determination of the IV using smaller samples than the iodometric method. Moreover, the determination can be carried out in less than 15 min, dramatically less than the time needed to carry out the iodometric method.
URI
http://hdl.handle.net/10459.1/58383
DOI
https://doi.org/10.1016/j.fuel.2010.06.016
Is part of
Fuel, 2010, vol. 89, núm. 11, p. 3489–3492
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