Ascorbyl palmitate-β-cyclodextrin inclusion complex as an oxygen scavenging microparticle

An ascorbyl palmitate-β-cyclodextrin inclusion complex (IC) was produced and evaluated as a possible oxygen scavenger. The X-ray diffraction profiles of ascrobyl palmitate (AP), β-cyclodextrin (β-CD), and the IC were characterized by wide angle X-ray diffraction (WAXD). The formation of inclusion complex induced large shifts in the WAXD signals. Surface morphology images from scanning electron microscopy showed that the IC had a rod shape. TGA analysis demonstrated that the IC had better thermal stability than the AP. The off-flavor profiles of the AP and the IC were analyzed by GC/MS. The IC had less off-flavor byproducts than the AP during oxygen scavenging reaction. The oxygen scavenging capability of the IC was compared with other oxygen scavengers, the AP and iron powder (IP), at two different storage temperatures, 4 and 23 °C. The IC had higher oxygen scavenging capability than the AP and the IP at both storage temperatures. The effect of thermal processing on oxygen scavenging capability was also investigated. Only the IC maintained good oxygen scavenging capability after thermal processing. Results demonstrated that the IC can be used as an effective oxygen scavenger.