WANG Hai-tao, PENG Jin-long, ZHANG Bin, et al. Extraction and Stability of Pigment from Hypericum japonicum[J]. Chinese journal of experimental traditional medical formulae, 2012, 18(9): 69-71.
WANG Hai-tao, PENG Jin-long, ZHANG Bin, et al. Extraction and Stability of Pigment from Hypericum japonicum[J]. Chinese journal of experimental traditional medical formulae, 2012, 18(9): 69-71. DOI: 10.13422/j.cnki.syfjx.2012.09.068.
Objective:To investigate extraction methods of pigment from Hypericum japonicum by different solvents
and investigate effects of different factors on stability of pigment.Method: Pigment was extracted with 6 different solvents
stability of pigment was tested with pH
temperature
light
reducing agents and oxidants.Result: Extraction effect of pigment was optimum by ultrasonic extraction 10 min with 95% ethanol at 30 ℃
These pigment was unstable in light
strong acidity and alkaline
metal ions of Mg2+
Al3+ and other conditions.Food additives
reducing agents and oxidants had little effect on stability of pigment.Conclusion: These pigment had good stability
but it must prevent pigment using in light and avoid acidity and alkaline condition.Pigment from H.japonicum could be used as a good resource of natural plant pigment.