Change search
ReferencesLink to record
Permanent link

Direct link
Molecular exchange in thermal equilibrium between dissolved and crystalline tripalmitin by NMR
KTH, Superseded Departments, Chemistry.ORCID iD: 0000-0002-0231-3970
2003 (English)In: Journal of the American Oil Chemists Society, ISSN 0003-021X, E-ISSN 1558-9331, Vol. 80, no 12, 1187-1192 p.Article in journal (Refereed) Published
Abstract [en]

An NMR technique to measure exchange kinetics at thermal equilibrium in dispersions of moderately soluble crystalline material is presented. By monitoring the exchange of molecules between pools in solid and dissolved form, one can characterize the surface specific exchange rate. Illustrative experiments were performed in a model system with beta-type crystals of tripalmitin as the solid phase and tripalmitin, a fraction of it deuterated, dissolved in a medium-chain TG oil as the liquid phase. The concentration of deuterated tripalmitin in the solvent was followed by H-2 NMR after the crystals, which initially lack deuterated tripalmitin, were immersed in the liquid. The variation of the H-2 concentration in the solvent provided the surface specific exchange rate. No systematic errors, due to the slight difference in properties of the deuterated tripalmitin compared to hydrogenated tripalmitin, were observed. The methodology worked well between crystal concentrations of 2 and 4 wt%.

Place, publisher, year, edition, pages
2003. Vol. 80, no 12, 1187-1192 p.
Keyword [en]
colloid chemistry, deuterium NMR dispersion, surface chemistry, surface exchange, triglyceride, nuclear-magnetic-resonance, solid-liquid ratio, wide-line nmr, model emulsions, kinetics, adsorption, fat
URN: urn:nbn:se:kth:diva-23051ISI: 000187584400006OAI: diva2:341749
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

Open Access in DiVA

No full text

Search in DiVA

By author/editor
Furo, Istvan
By organisation
In the same journal
Journal of the American Oil Chemists Society

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 21 hits
ReferencesLink to record
Permanent link

Direct link