使用拉曼光谱学评估过器子采样和推断,以量化环境样本中的微塑料
Dounia El Khatib1, Troy D Langknecht1, Michaela A Cashman2
1Oak Ridge Institute of Science Education, c/o U.S. Environmental Protection Agency, ORD/CEMM Atlantic Coastal Environmental Sciences Division, Narragansett, RI, USA.
Marine pollution bulletin
|May 28, 2023
概括
这项研究引入了一种高效的亚采样方法,用于使用拉曼光谱分析过器上的微塑料 (MP). 一个12.5%的过子样准确地估计了沉积物中的总MP污染.
科学领域:
- 环境科学 环境科学
- 分析化学 分析化学
- 材料科学 材料科学 材料科学
背景情况:
- 描述微塑料 (MP) 通常涉及过器捕获和拉曼光谱.
- 手动扫描整个过器是耗时和劳动密集的.
- 有效的量化方法对于评估PM污染至关重要.
研究的目的:
- 开发和验证一个分样采集方法,用于对沉积物中的MP (45-1000μm) 的拉曼光谱分析.
- 为了优化子样本分数,以准确量化MP.
- 应用评估海洋沉积物污染的方法.
主要方法:
- 开发了一种用于过器上的MP分析的子采样技术.
- 在水和沉积物样本中使用尖的MPs评估了该方法.
- 利用统计分析来确定最佳的亚样本大小和形状.
- 应用了一种额外推算方法来量化.
主要成果:
- 12.5%的过器的亚取样分数,以形的形式,被发现是最佳的.
- 这种亚抽样方法被证明是有效和准确的估计总MP数量.
- 该方法已成功应用于评估美国海洋沉积物中的MP污染.
结论:
- 亚样本显著减少了通过拉曼光谱进行MP分析所需的时间和劳动力.
- 12.5%子子采样方法为MP量化提供了可靠和准确的方法.
- 这种优化的方法促进了对海洋环境中微塑料污染的更广泛评估.
相关概念视频
01:20Raman Spectroscopy: Overview
480
The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
480
01:26Raman Spectroscopy Instrumentation: Overview
470
A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
470