Question

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液液微萃取法测定饮料中多效唑的残留

摘要：农药的使用是防治植物病虫草害的重要手段，在保证农业稳产、高产、满足人们对农副产品需求方面发挥着重要作用。然而，事物总是利弊共存的，尽管农药有突出的优点，并且在农业生产中起着重要作用，但它也存在某些不足，尤其一些化学杀虫剂，如果管理不严，施用不合理，就会对人畜及其有益生物产生毒害，对环境产生污染等。因此，人们对农药残留及农药对环境污染问题更加重视。
本论文综述了液相微萃取方法的发展应用，特别是对液液微萃取技术的方法给予了详细的介绍。并且实验建立了液液微萃取测定饮料中多效唑残留的方法，通过此实验最终确定了最佳实验条件：以甲苯为有机萃取剂，萃取液滴体积为2L，萃取时间为15min，搅拌速度为200rpm时为最佳条件。
关键词：农药残留，液液微萃取，多效唑，气相色谱

Answer 1

In fluid fluid micro extraction method determination drink multiple-effect zuo remains the abstract: The agricultural chemicals use prevents and controls the important means which the plant disease Chinese caterpillar fungus harms, in the guarantee agriculture stable production, the high production, the satisfied people are playing the influential role to the agricultural and subsidiary products demand aspect. However, the thing advantages are always coexistent, although the agricultural chemicals have the prominent merit, and is playing the influential role in the agricultural production, but it also has certain insufficiencies, especially some chemistry pesticide, if the management is lax, employs unreasonable, produces to the human and animals and the beneficial biology poisons, will have the pollution to the environment and so on. Therefore, the people even more take seriously to the pesticide residue and the agricultural chemicals to the environmental pollution question. the present paper summarized the liquid phase micro extract method development application, specially has given the detailed introduction to the fluid fluid micro extract technology's method. And tested has established in the fluid fluid micro extract determination drink the multiple-effect zuo residual method, has determined the best experimental condition finally through this experiment: Take the toluene as the organic extracting agent, the extract bubble volume is 2L, the extract time is 15min, the mixing speed is when 200rpm is the optimum condition. key word: Pesticide residue, fluid fluid micro extract, multiple-effect zuo, gas chromatography

Answer 2

Micro-liquid extraction of the residues in beverages PP333

Abstract: Pesticide Control Plant Diseases, Pests and Weeds use is an important means to ensure stable agricultural, high-yield, agricultural and sideline products to meet the needs of the people plays an important role. However, things are always pros and cons of co-existence, although pesticides have highlighted the advantages in agricultural production and play an important role, but there are also certain deficiencies, especially some chemical pesticides, poor management, application unreasonable, Will be useful for people and livestock and produce biological poisoning, and environmental pollution. Therefore, the people of pesticide residues and pesticides to pay more attention to the environmental pollution problems.
This paper reviewed the liquid phase micro-extraction method development of applications, especially for micro-liquid-liquid extraction methods to give a detailed introduction. And the establishment of a micro-liquid-liquid extraction of residues in beverages PP333 way through this experiment ultimately determine the optimal experimental conditions: toluene Organic Chemistry, extraction droplet size for 2 L, extraction time for 15 min, stirring At a speed of 200 rpm for the best conditions.
Key words: pesticide residues, liquid-extraction, paclobutrazol, GC

Answer 3

Abstract: Pesticide Control Plant Diseases, Pests and Weeds use is an important means to ensure stable agricultural, high-yield, agricultural and sideline products to meet the needs of the people plays an important role. However, things are always pros and cons of co-existence, although pesticides have highlighted the advantages in agricultural production and play an important role, but there are also certain deficiencies, especially some chemical pesticides, poor management, application unreasonable, Will be useful for people and livestock and produce biological poisoning, and environmental pollution. Therefore, the people of pesticide residues and pesticides to pay more attention to the environmental pollution problems.
This paper reviewed the liquid phase micro-extraction method development of applications, especially for micro-liquid-liquid extraction methods to give a detailed introduction. And the establishment of a micro-liquid-liquid extraction of residues in beverages PP333 way through this experiment ultimately determine the optimal experimental conditions: toluene Organic Chemistry, extraction droplet size for 2 L, extraction time for 15 min, stirring At a speed of 200 rpm for the best conditions.
Key words: pesticide residues, liquid-extraction, paclobutrazol, GC