关键词: 紫粒小麦麦麸, 色素, 提取工艺, 抗氧化活性, 毛发染色

Abstract: With purple wheat bran as raw material, natural purple pigment was extracted by alkali water cracking, macroporous adsorption resin purifying, sodium filter membrane concentrating and evaporation concentrating. The extraction conditions were optimized through single factor experiments. And at room temperature (25~30℃), the optimum process conditions for extracting purple pigment were determined as follows: Extraction time was 60 min, the ratio of material to liquid was 1∶4 (g/mL), 3 times of extraction. Antioxidant experiments showed that the extracted wheat purple pigment had high antioxidant activity. Moreover, the wheat purple pigment could dye wool into different colors after reacting with different metal ions. The results showed that the wheat purple pigment extracted by optimized processes had high purity and strong antioxidant activity, and it had great development potential and practical value.

Key words: purple wheat bran, pigment, extraction process, antioxidant activity, hair dyeing