2011•Beverage industryRequires access
Optimization of technology for extraction of red pigment from azalea by response surface methodology
Zhong Nian-chi
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Abstract
With HCl-ethanol solution as the extracting agent,acidic extraction was adopted to extract red pigment from azalea,and the effects of extraction time,temperature,solid-liquid ratio and ethanol concentration on the extraction were investigated.Using Box-Benhnken response surface methodology,the extraction process was optimized,and a response surface was established with the pigment's absorbency as the response value to study the interactions among these factors.It was concluded that the optimum extraction conditions included 40℃,180 min,ethanol concentration 60% and solid-liquid ratio 1 ∶ 8.