Humans have a long history of using organic compounds. As early as17th century ago, humans could obtain some organic compounds such as protein, oil, sugar and dyes from animals and plants as necessities for eating, wearing and using. 1828 German chemist F. Wohler first synthesized organic urea from inorganic ammonium cyanate.
After 1844, people successively synthesized a large number of organic compounds such as methane, acetylene, acetic acid, oil, sugar, etc. Since then, human beings have made organic chemistry enter the era of synthesis. With the development of synthetic organic matter, people clearly realize that there is no obvious boundary between organic matter and inorganic matter, but there are some differences in composition, structure and properties.
It has been known that most organic compounds contain elements such as carbon, hydrogen, oxygen and nitrogen, and a few also contain sulfur, phosphorus and halogen. Any organic compound contains carbon in its molecular composition, and most of them also contain hydrogen.
Because the hydrogen atom of organic compound molecules can be replaced by other atoms or atomic groups, many other organic compounds are derived, so modern people generally think that hydrocarbons and their derivatives are called organic compounds, which is called organic compounds for short; The science of studying organic compounds is called organic chemistry.
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Criteria for judging organic food:
1, raw materials come from organic agricultural production system or wild natural products.
2, organic food in the process of production and processing must strictly follow the organic food production, collection, processing, packaging, storage and transportation standards.
3. Strict quality management system, production process control system and tracking system must be established in the process of organic food production and processing, so a transition period is generally needed; This conversion process generally takes 2-3 years before it can be approved as organic food.
4. Organic food must be certified by a legal organic food certification body.
Baidu encyclopedia-organic food
Baidu encyclopedia-organic