SOLID-STATE EMULSIONS - EVALUATION BY H-1 AND C-13 SOLID-STATE NUCLEAR-MAGNETIC-RESONANCE

The molecular environment of sucrose and mineral oil within sucrose an d mineral oil solid state emulsions was investigated by NMR techniques . The C-13 and H-1 chemical shifts of sucrose and mineral oil to those observed in solid state emulsions (comprised of sucrose and mineral o il) were equivalent, indicating that the local structure of sucrose is unaffected by the presence of mineral oil in the solid-state emulsion . Cross-polarization, magic angle spinning C-13 (CPMAS) in conjuncton with single-pulse studies indicated that the H-1-C-13 dipole-dipole in teractions are very weak, i.e., mineral oil is highly mobile. Spinning side bands were observed, however, in H-1 single-pulse, magic angle s pinning (SPMAS) spectra of the solid-state emulsion, indicating that t he mineral oil has solid properties. Although the mineral oil was show n to be highly mobile, it also appears to be constrained or included b y the sucrose.