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A rapid benchtop NMR method for determination of droplet size distributions in food emulsions
Author(s) -
van Duynhoven John P. M.,
Maillet Benjamin,
Schell Jimmy,
Tronquet Mathieu,
Goudappel GertJan W.,
Trezza Elena,
Bulbarello Andrea,
van Dusschoten Dagmar
Publication year - 2007
Publication title -
european journal of lipid science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.614
H-Index - 94
eISSN - 1438-9312
pISSN - 1438-7697
DOI - 10.1002/ejlt.200700019
Subject(s) - spectrometer , analytical chemistry (journal) , pulsed field gradient , emulsion , chemistry , materials science , chromatography , biological system , optics , physics , molecule , organic chemistry , biology
The determination of water and oil droplet size distributions in food emulsions by low‐field NMR has the advantage of a simple and non‐perturbing sample preparation. Furthermore, NMR performs very well with respect to precision. The current implementation on most benchtop NMR spectrometers deploys a variation of gradient duration and requires continuous corrections for gradient imbalances, thus making the whole procedure a time‐consuming one. By using variation of gradient strength and further stretching the capability of commercial benchtop NMR spectrometers, both water and oil droplet sizes can be measured in a more rapid manner, typically two to three times faster. The measured droplet size distributions are equivalent to those assessed by the current (slow) method, for both O/W and W/O emulsions. Furthermore, the rapid method shows a good performance with respect to precision. In addition, the method is able to determine droplet sizes in samples with much smaller amounts of dispersed phase.