Preparation and stability of paprika oleoresin complex in sodium carboxymethyl cellulose, sodium hyaluronic acid, hydroxypropyl methyl cellulose, and cyclodextrin

• Main Authors: Meng-Fen Jheng, 鄭孟芬
• Other Authors: Ming-Hsien Huang
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/85223256308046019514

碩士 === 國立高雄應用科技大學 === 化學工程與材料工程系 === 99 === Food colorants can be divided into synthetic and natural colorants. The synthetic colorants are found more dangerous and poisonous than natural colorants for human body. Therefore, the natural colorants have been rapidly developed for food, cosmetic and pharmaceutical industry. Paprika oleoresin, the main component of chili, is a natural red colorant. This study firstly extracted capsaicin from chili fruits under alkaline conditions. Paprika pigments were dissolved in acetone from chili skin. The oil-soluble paprika pigments and water-soluble paprika pigments was separated by HP-2MG column. The color value (E_1cm^(1%)) of oil- soluble paprika pigments and water-soluble paprika pigments were 174 and 47. The paprika pigments are very easy to be faded by environmental factors. Then, the polymer and cyclodextrin were used as a stabilizer to increase resistance of the discoloration. The water-soluble complexes were prepared with sodium carboxymethyl cellulose (CMC), sodium hyaluronic acid (HA), hydroxypropyl methyl cellulose (HPMC), and cyclodextrin (CD) to improve the stability and water solubility of oil-soluble paprika pigments. The polymers or cyclodextrin were dissolved in water. The solution of oil-soluble paprika pigments dissolved in acetone was added to the aqueous polymer solution. The water-soluble paprika complexes can be obtained after acetone was evaporated. From the color destruction of sun light, heat, and pH stability tests of the four complexes which were examined by UV/Vis and FTIR, the CMC paprika complex shows a much better result than the others. The rate of color destruction for CMC paprika complex was a first order kinetics in the sun light and heating conditions.