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Iodine values (IVs) of some biodiesel samples were analyzed using both 1 H NMR and a standard iodometric method. 1 H NMR was carried out with and without 1,4-dioxane as an internal standard (IS). The results obtained using 1 H 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...
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