构建磁基团丰富的超交联聚合物,其核心是功能性三,以有效丰富植物生长调节剂
Yaxing Guo1, Juntao Wang2, Weihua Liu2
1College of Food Science and Technology, Hebei Agricultural University, Baoding 071001, China; Department of Chemistry, College of Science, Hebei Agricultural University, Baoding 071001, China.
Food chemistry
|September 8, 2023
概括
一种新的磁性吸附剂有效地从食物和水中提取植物生长调节剂 (PGR). 这种方法可以在现实世界样本中灵敏而准确地检测PGR残留物.
科学领域:
- 分析化学 分析化学
- 环境科学 环境科学
- 食品安全 食品安全
背景情况:
- 精确确定微量植物生长调节剂 (PGR) 需要有效的样本预处理方法.
- 现有的PGR缩方法可能是低效的,需要新的方法.
研究的目的:
- 开发和验证一种新的磁吸附剂,用于高效地提取PGRs.
- 建立一种敏感的分析方法,用于在多种矩阵中确定PGR.
主要方法:
- 合成磁性超交联聚合物 (M-CTT-9OH-HCP) 作为磁性吸附剂.
- 使用吸附剂从水,西瓜,西红和牛奶中固态提取PGR.
- 使用高性能液体色谱-光检测 (HPLC-FLD) 分析PGR.
主要成果:
- 吸附剂M-CTT-9OH-HCP证明了有效地提取PGRs.
- 开发的HPLC-FLD方法在0.03-60.0 ng g-1 / mL范围内显示出良好的线性 (r ≥ 0.9973).
- 实现了高方法回收 (83.0%-119%) 和可接受的精度 (RSDs ≤9.8%).
- 获得了低检测极限 (0.01-1.50 ng g-1 / mL) 和定量 (0.03-5.00 ng g-1 / mL).
结论:
- 这种新的磁吸附剂为PGR丰富提供了一个高效和敏感的工具.
- 已建立的方法适用于在各种现实世界样本中准确确定PGR残留物.
- 这种方法在食品和环境分析中推进了样本预处理技术.
更多相关视频
05:17Enhancement of the Initial Growth Rate of Agricultural Plants by Using Static Magnetic Fields
Published on: July 8, 2016
13.3K
15:33Microwave-assisted Functionalization of Polyethylene glycol and On-resin Peptides for Use in Chain Polymerizations and Hydrogel Formation
Published on: October 29, 2013
29.0K
相关概念视频
01:17Ziegler–Natta Chain-Growth Polymerization: Overview
3.4K
Ziegler–Natta polymerization is another form of addition or chain‐growth polymerization used for synthesizing linear polymers over branched polymers. The catalyst used for polymerization is the Ziegler–Natta catalyst, named after Karl Ziegler and Giulio Natta, who developed it in 1953. This catalyst is an organometallic complex of titanium tetrachloride and triethyl aluminum, with the active form of the catalyst being an alkyl titanium compound. Using the Ziegler–Natta...
3.4K
01:20Anionic Chain-Growth Polymerization: Overview
2.1K
The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
2.1K
01:04Anionic Chain-Growth Polymerization: Mechanism
2.1K
The mechanism for anionic chain-growth polymerization involves initiation, propagation, and termination steps. In the initiation step, a nucleophilic anion, such as butyl lithium, initiates the polymerization process by attacking the π bond of the vinylic monomer. As a result, a carbanion, stabilized by the electron‐withdrawing group, is generated. The resulting carbanion acts as a Michael donor in the propagation step and attacks the second vinylic monomer, which acts as a Michael...
2.1K
00:57Cationic Chain-Growth Polymerization: Mechanism
2.4K
The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the...
2.4K
01:10Radical Chain-Growth Polymerization: Overview
2.5K
Chain-growth or addition polymerization is successive addition reactions of monomers with a polymer chain. In radical chain-growth polymerization, the reaction proceeds via a free-radical intermediate. The free radical is formed from radical initiators, which spontaneously generate free radicals by homolytic fission. Organic peroxides (such as dibenzoyl peroxide, as shown in Figure 1) or azo compounds are popular radical initiators. A low concentration ratio of radical initiator to monomer is...
2.5K
01:03Step-Growth Polymerization: Overview
3.5K
Step-growth or condensation polymerization is a stepwise reaction of bi or multifunctional monomers to form long-chain polymers. As all the monomers are reactive, most of the monomers are consumed at the early stages of the reaction to form small chains of reactive oligomers, which then combine to form long polymer chains in the late stages. Hence, the reaction has to proceed for a long time to achieve high molecular weight polymers.
Many natural and synthetic polymers are produced by...
Many natural and synthetic polymers are produced by...
3.5K