分光测色计在β-胡萝卜素微胶囊干粉中的应用研究

摘要

β-胡萝卜干粉1％CWS是一种经微胶囊技术制备而成的、可冷水溶解的、便于使用的产品.其基本色调为黄色,主要适用于水基食品、速溶食品、布丁、糖果和乳制品等的着色和营养强化.本文介绍了分光测色剂的测量方法及应用,并用该仪器对不同浓度的β-胡萝卜素干粉1％CWS水溶液进行颜色检测,得出了代表其颜色的L*,a*,b*值的范围,建立了该产品的颜色控制标准.结果为:β-胡萝卜素干粉1％ CWS 20ppm水溶液的L*,a*,b*值范围依次为68～78、22～27、113～126; 200ppm水溶液的L*、a*、b*值范围依次为45～52、23～29、74～85.%β-carotene powder 1％CWS is a cold water soluble,convenient product which was preparated by the microencapsulating technology.The product was yellow and was applicated to the fortification and coloration of water-based food,instant products,puddings,confectionery and milk products.The measurement method and application of spectrophotometer was introduced.The aqueous solution of different concentration β-carotene powder 1％ CWS was measured with this instrument.The data range of L *,a *,b * respesenting its color was determined.The standard for color was established.The result is that:β-carotene powder 1％ CWS 20ppm aqueous solution of the product:L*,68 ～78; a *,22 ～27; b *,113 ～126; 200ppm aqueous solution of the product:L *,45 ～52; a *,23 ～29; b*,74～85.