食品的染色不外乎采用两大类色素:天然色素与化学合成色素。天然色素来自天然物,主要从动植物组织中提取,是一种安全理想的食用色素,有些还有一定的营养保健作用,如β胡萝卜素、促进生长发育的叶绿素等。但由于天然色素提取成本高、着色力差、颜色不稳定而极少被采用。化学合成色素是从煤焦油中提取,或以苯、甲苯、萘等芳烃类化合物为原料合成,又称煤焦油色素,不仅 Food dyeing is nothing more than two types of pigment: natural pigment and chemical synthesis pigment. Natural pigment from natural products, mainly from plant and animal tissues extracted, is a safe and ideal food coloring, and some nutrition and health effects, such as β-carotene, and promote growth and development of chlorophyll. However, due to the high cost of natural pigment extraction, poor coloring, color instability and rarely used. Chemical synthesis pigments are extracted from coal tar, or benzene, toluene, naphthalene and other aromatic compounds as raw materials, also known as coal tar pigment, not only