基于合体Ag2S量子点的发光传感器用于在牛奶中检测氧基环素
T S Kondratenko1, M S Smirnov1, I G Grevtseva1
1Voronezh State University, 1 Universitetskaya Sq., 394018, Russia.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy
|February 11, 2026
概括
使用硫化银量子点 (Ag2S QDs) 的新型发光传感器可以有效地检测生牛奶中的氧化三环素 (OTC). 这种传感器为乳制品中的抗生素残留分析提供了一种敏感且可靠的方法.
科学领域:
- 材料科学 材料科学 材料科学
- 分析化学 分析化学
- 生物技术是生物技术.
背景情况:
- 准确检测原牛奶中的抗生素残留物,如牛氧环素 (OTC),对于食品安全至关重要.
- 现有的OTC检测方法可能缺乏灵敏度或需要复杂的样本准备.
- 发光传感器为快速和敏感的分析物检测提供了一个有希望的替代方案.
研究的目的:
- 开发和描述一种发光传感器,用于在生牛奶中检测氧基环素 (OTC).
- 研究基于Ag2S/L-Cys QDs的发光灭的传感机制.
- 为了评估实际应用的传感器性能参数.
主要方法:
- 合成与L-氨酸 (L-Cys) 被动化的合硫化银量子点 (Ag2S QDs).
- 在725nm处使用Ag2S/L-Cys QD的发光灭,用于OTC检测.
- 提出了一种传感器机制,涉及OTC和QD之间的电荷转移复合体形成.
主要成果:
- 传感器在OTC的存在下证明了有效的发光灭.
- 已确定的传感器参数:检测极限 (LOD) 为0.53μM,定量检测极限 (LOQ) 为1.16μM,线性范围为0-20μM.
- 实现了与现有的发光传感器可比的性能,用于生牛奶分析.
结论:
- 开发的基于Ag2S/L-Cys QD的发光传感器是生牛奶中OTC检测的可行工具.
- 传感器机制依赖于OTC和QD表面之间的特定相互作用.
- 传感器的灵敏度和线性范围符合乳制品中实用抗生素残留监测的要求.
相关概念视频
03:22Colloids
21.3K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
21.3K
02:43Quantum Numbers
52.3K
It is said that the energy of an electron in an atom is quantized; that is, it can be equal only to certain specific values and can jump from one energy level to another but not transition smoothly or stay between these levels.
52.3K
02:45The Quantum-Mechanical Model of an Atom
59.7K
Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra.
59.7K
01:17Colloids and Suspensions
3.5K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles visible to the naked eye or seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. The suspended particles in a suspension settle out after some time of mixing. The separation of particles from a suspension is...
3.5K
01:09Colloidal precipitates
6.5K
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
6.5K
01:26The Dot Product
266
Measuring how one directional quantity affects another along a specific path involves comparing their orientation and strength. When two such quantities are represented using direction and amount, a numerical result is computed to show how much one acts along the path of the other. This result comes from a rule combining both inputs' horizontal and vertical parts and adding the results.This calculation gives a single value that grows larger when both inputs point in similar directions and...
266