Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 56, Issue 6, Pages 1866-1872Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jf073227n
Keywords
moisture; olive oil; P-31 NMR spectroscopy; karl Fischer titration
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A method for moisture determination in olive oil using P-31 NMR spectroscopy is developed. This method is based on the replacement of the hydrogen atoms of water molecules with the tagging agents 2-chloro-4,4,5,5-tetra m ethyl-1, 3,2-dioxaphospho lane and diphenylphosphinic chloride. Both reagents were successful in determining moisture in olive oil. However, only the second reagent provided a clean and instantaneous reaction under mild condition with no side reactions as observed with the first reagent. A study comparison was made to assess the agreement between the present analytical NIVIR method and the well-established methods of Karl Fischer titration.
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