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Molecular exchange in thermal equilibrium between dissolved and crystalline tripalmitin by NMR
YKI – Ytkemiska institutet.
YKI – Ytkemiska institutet.
2003 (engelsk)Inngår i: Journal of the American Oil Chemists Society, ISSN 0003-021X, E-ISSN 1558-9331, Vol. 80, s. 1187-1192Artikkel i tidsskrift (Fagfellevurdert)
Abstract [en]

An NMR technique to measure the 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 b-type crystals of tripalmitin as the solid phase and tripalmitin, a fraction of it deuterated, dissolved in a medium chain triglyceride oil as the liquid phase. The concentration of deuterated tripalmitin in the solvent was followed by 2H NMR after the crystals, that initially lack deuterated tripalmitin, were immersed in the liquid. The variation of the 2H concentration in the solvent provided the surface specific exchange rate. No systematic errors, due to the slight difference in properties of the deuterated tripalmitin (2H-PPP) compared to hydrogenated tripalmitin (1H-PPP), were observed. The methodology worked well between crystal concentrations of 2 and 4-wt%.

sted, utgiver, år, opplag, sider
2003. Vol. 80, s. 1187-1192
Emneord [en]
Dispersion, triglyceride, deuterium NMR, areas of Colloid and Surface Chemistry<
HSV kategori
Identifikatorer
URN: urn:nbn:se:ri:diva-26984OAI: oai:DiVA.org:ri-26984DiVA, id: diva2:1053987
Merknad
A1487Tilgjengelig fra: 2016-12-08 Laget: 2016-12-08 Sist oppdatert: 2017-11-29bibliografisk kontrollert

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