南阳灰色小麦色素的变色范围与吸收光谱特性  

Absorption spectral characteristics and colour range of pigment in Nanyang grey wheat

作　　者：高向阳[1,2] 朱盈蕊[3] 高遒竹 王长青[2] 

机构地区：[1]郑州科技学院食品科学与工程系,河南郑州450064 [2]河南农业大学食品科学技术学院,河南郑州450002 [3]郑州市质量技术监督检验测试中心,河南郑州450006 [4]江南大学食品学院,江苏无锡214122

出　　处：《粮油食品科技》2015年第5期68-71,共4页Science and Technology of Cereals,Oils and Foods

基　　金：河南省科技攻关项目(JBO2-0624430003)

摘　　要：探讨南阳彩色小麦色素的变色范围和吸收光谱等特性,为该资源的科学利用和开发提供参考。以南阳灰麦为材料,用酸性乙醇溶液超声波辅助浸提色素后,用酸碱滴定法和分光光度法测定。结果表明：在可见光区,色素乙醇溶液的最大吸收波长为541 nm,变色范围为p H 4.75~6.58;灰麦色素是较理想、经济的环保型酸碱指示剂,也可作为天然着色剂和抗氧化剂等食品添加剂加以开发利用。The absorption spectral characteristics and colour range of pigment in Nanyang grey wheat was studied, which provided reference for scientific utilization and development of the pigment. Nanyang grey wheat was soaked in acidic ethanol to extract pigment by ultrasonic. The pigment was determined by acid - base titration and spectrophotometry- The results showed that in the visible region the maximum ab- sorption wavelength lied at 541 nm, colour range was pH 4.75 - 6.58. The pigment in grey wheat is a relatively ideal, economical and environmentally friendly acid- base indicator, it can be developed and used as a natural colorant and antioxidant in food.

关 键 词：彩色小麦 色素 变色范围 吸收光谱 

分 类 号：TS202[轻工技术与工程—食品科学] S512.9[轻工技术与工程—食品科学与工程]