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通心红萝卜是我国四川某地的特产,当地人叫“胭脂红萝卜”。它不仅与其他萝卜一样,可生吃、熟吃、腌制,也可作禽畜饲料,而且还含有一种较浓的天然红色素。其植株除叶片绿色外,叶柄、叶脉、根的内外均是紫红色。如将萝卜用刀切一片放在一杯清水中,就会立即化解成鲜红色、很美观。据报导:50公斤萝卜可提取1.5公斤结晶红色素。由于食品上的化学合成色素有致癌作用,1991年已被联合国禁用,所以提取植物色素是世界各国竞相研究的课题,急待多方面开发与利用。天然色素最大优点是用于食品中对人体十分安全无害。每吨天然色素价格高于化学合成色素的数十
Macaroni carrot is a specialty of somewhere in Sichuan, the locals called “carmine carrot.” Not only is it the same as other radishes, it is eaten raw, cooked, marinated and also used as poultry feed, but it also contains a thicker natural red pigment. In addition to the green leaves of its plants, petiole, veins, both inside and outside the roots are purple. If the radish cut with a knife in a glass of water, it will immediately resolve into bright red, very beautiful. It is reported that 50 kg of radish can extract 1.5 kg of crystalline red pigment. Due to carcinogenic effects of chemical synthetic pigments on food, it has been banned by the United Nations in 1991. Therefore, the extraction of plant pigments is a topic that various countries in the world are competing to study. It is urgently needed to be developed and utilized in many aspects. The biggest advantage of natural pigment is used in food is very safe and harmless to the human body. The price of natural pigment per ton is higher than dozens of chemical synthesis pigments