薄荷香精微胶囊包埋率不同测定方法的比较分析.pdfVIP

※分析检测 食品科学 2010, Vol. 31, No. 06 239 1 1 1 2 , 2 杨 君 ，赵 生 ，陈科兵 ，朱丽云 * ，蒋家新 (1.浙江中烟工业有限责任公司，浙江杭州 310012 ；2. 中国计量学院生命科学学院，浙江杭州 310018) 通过紫外分光光度法、折光率法、近红外漫反射光谱法和气相色谱法等对薄荷香精中主要成分薄荷醇进 行测定，分析4 种方法测定的薄荷醇- 乙醇溶液标准曲线的线性相关性，以获得薄荷香精微胶囊包埋率测定的最佳 方法。结果表明：除紫外吸收法线性相关系数为0.9317 以外，其他3 种测定方法线性相关系数均在0.99 以上，线 性相关性良好，均可以作为薄荷香精微胶囊包埋率测定的方法。 薄荷醇；折光率；近红外漫反射光谱；气相色谱；包埋率 Comparative Study of Different Methods for Determination of Entrapment Efficiency of Mint Flavour Microcapsules 1 1 1 2, 2 YANG Jun ，ZHAO Sheng ，CHEN Ke-bing ，ZHU Li-yun *，JIANG Jia-xin (1. China Tobacco Zhejiang Industrial Co. Ltd., Hangzhou 310012, China； 2. College of Life Sciences, China Jiliang University, Hangzhou 310018, China) Abstract ：Standard curves for determination of menthol responsible for the characteristic aroma of mint flavour, by different methods such as UV absorption spectroscopy, refractive index, near-infrared diffuse reflectance spectroscopy and gas chroma- tography were established and their linearity was analyzed to select reliable methods for determination of entrapment efficiency of mint flavour microcapsules. Results showed that UV absorption spectroscopy gave a determination coefficient of 0.9317, whereas determination coefficients of other three methods were all over 0.99, indicating a good linear correlation. Therefore, refractive index, near-infrared diffuse reflectance spectroscopy and gas chromatography can provide a relatively accurate determination for entrapment efficiency of mint flavour microcapsules. Key words ：menthol ；refractive index ；near-infrared d