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相关概念视频

UV–Vis Spectrometers01:14

UV–Vis Spectrometers

The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell. Samples for...
Gas Chromatography: Types of Detectors-II01:19

Gas Chromatography: Types of Detectors-II

In gas chromatography, different detectors are employed to meet specific analytical needs. These detectors are often categorized based on their detection mechanisms and the types of compounds they are best suited to analyze. Thermal Conductivity Detectors (TCD), Flame Ionization Detectors (FID), and Electron Capture Detectors (ECD) represent common categories, each with unique operating principles and applications. However, beyond these, several other detectors are designed for more specialized...
High-Performance Liquid Chromatography: Types of Detectors01:15

High-Performance Liquid Chromatography: Types of Detectors

The role of the detectors in High-Performance Liquid Chromatography (HPLC) is to analyze the solutes as they exit from the chromatographic column. The detector recognizes the solute's property and generates corresponding electrical signals, which are converted into a readable graph of the detector's response versus elution time called a chromatogram at the computer. There are several types of HPLC detectors, each with its own advantages and limitations, depending on the analyte properties and...
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Electronic Distance Measuring Instruments

Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over short distances...
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The Global Positioning System (GPS) has become an indispensable tool in fieldwork, offering unparalleled precision and efficiency for surveying, navigation, and infrastructure development. By harnessing signals from a constellation of satellites, GPS receivers determine the location of objects with remarkable speed and accuracy, often completing calculations within a second.Advantages of Modern GPS TechnologyContemporary GPS receivers are designed to meet the practical demands of field...

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相关实验视频

Updated: Jul 11, 2026

Quantitatively Measuring In situ Flows using a Self-Contained Underwater Velocimetry Apparatus (SCUVA)
09:22

Quantitatively Measuring In situ Flows using a Self-Contained Underwater Velocimetry Apparatus (SCUVA)

Published on: October 31, 2011

用红色发射探测器在水中启动和比度探测.

Elizabeth M Nolan1, Stephen J Lippard

  • 1Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.

Journal of the American Chemical Society
|April 14, 2007
PubMed
概括
此摘要是机器生成的。

一个新的红色发射传感器,MS5,能够在水溶液中敏感和选择性地检测离子 (Hg II). 这种可重复使用的传感器显示出高特异性和现实环境监测的潜力.

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Continuous Instream Monitoring of Nutrients and Sediment in Agricultural Watersheds
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科学领域:

  • 化学传感器 化学传感器
  • 环境化学环境化学
  • 材料科学 材料科学 材料科学

背景情况:

  • (Hg) 是一种有毒的重金属污染物,对环境和健康产生重大影响.
  • 开发选择性和敏感的传感器来检测Hg (II) 是环境监测和修复的关键.
  • 现有的Hg(II) 检测方法经常面临选择性,灵敏性或复杂矩阵中的适用性方面的挑战.

研究的目的:

  • 为了合成和描述一种新的红色发射光传感器,用于检测离子 (Hg (II)).
  • 评估传感器在水溶液中的光物理性质,Hg(II) 结合能力和选择性.
  • 评估传感器在现实世界水样中的性能及其在现场应用中的潜力.

主要方法:

  • 一个基于半纳弗托化的传感器 (MS5) 的合成,该传感器包含一个富含铁的金属结合单元.
  • 光谱分析 (光) 来确定光物理性质和Hg2结合.
  • 对各种金属离子的选择性研究,包括,土,过渡金属,Zn,和Cd.
  • 对传感器进行可逆性和可回收性测试.
  • 一个模型化合物的X射线晶体学,以阐明Hg (II) 协调环境.

主要成果:

  • 合成的传感器 (MS5) 呈现红色的辐射,并可启动,单次激发双排放的Hg (II) 的比度检测.
  • 在广泛的干扰离子中,MS5对Hg (II) 具有很高的特异性和选择性.
  • 传感器实现了Hg的低检测极限50nM,并表现出可逆结合,允许回收利用.
  • X射线晶体学揭示了一个扭曲的三角形双金字塔协调几何体,涉及硫,氨基和氧原子.
  • 在的天然水样本中成功检测出Hg(II),突出了传感器的实际应用.

结论:

  • MS5是一种高效的光传感器,用于在水性介质中敏感和选择性地检测Hg.
  • 传感器的可逆结合和可回收性为实际应用提供了优势.
  • 在复杂的水样中证明的性能强调了MS5在环境中污染监测方面的潜力.