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相关概念视频

Sampling Methods: Sample Types01:18

Sampling Methods: Sample Types

454
Sampling materials are classified into three main types: solid, liquid, and gas.
Solid samples include a variety of substances, such as sediments from water bodies, soil, metals, and biological tissues. Two standard methods for extracting sediments from water bodies are grab sampling and piston coring. Grab sampling involves using a device to collect a discrete sediment sample from the bottom of a water body with minimal disturbance. Grab samples do not always represent the entire area due to...
454

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相关实验视频

Updated: Sep 18, 2025

Sampling, Sorting, and Characterizing Microplastics in Aquatic Environments with High Suspended Sediment Loads and Large Floating Debris
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雨水中的微塑料:采样和方法挑战

Andres Sanchez Garcia1, Huayun Zhou2, Cesar Gomez-Avila1

  • 1Department of Chemical Engineering, Texas Tech University, Lubbock, TX 79409, USA.

Toxics
|June 25, 2025
PubMed
概括
此摘要是机器生成的。

在雨水中采样和分析微塑料 (MP) 是一个挑战. 在采样和过过程中可能会发生污染,某些分析方法可能会低估MP数量,强调需要强有力的质量控制.

关键词:
尼罗河红色 尼罗河红色拉曼光谱法 拉曼光谱法光显微镜的光显微镜.微塑料微塑料的使用风暴水 雨水 雨水 雨水

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科学领域:

  • 环境科学 环境科学
  • 分析化学 分析化学
  • 水的质量 水的质量

背景情况:

  • 雨水排放是微塑料污染进入地表水的主要途径.
  • 在雨水控制措施中用于微塑料分析的现有方法面临重大挑战.
  • 美国各地区的变化使标准化微塑料评估复杂化.

研究的目的:

  • 调查美国雨水中微塑料的采样,处理和表征方面的挑战.
  • 在微塑料分析过程中识别污染源.
  • 评估用于检测微塑料的不同分析技术的有效性.

主要方法:

  • 使用自动采样器收集的雨水沉积物样本.
  • 通过可见和光显微镜用尼罗河红色染料进行分析.
  • 通过拉曼光谱来确认.
  • 包括实验室和现场空白来进行质量控制.

主要成果:

  • 过和采样过程是实验室污染的重要来源.
  • 仅仅依靠绿色光可能会低估微塑料的数量.
  • 拉曼光谱技术面临着颜料和添加剂的干扰,特别是对于≤10微米的颗粒.
  • 在所有分析阶段,质量保证和质量控制至关重要.

结论:

  • 实施严格的质量保证和控制对于环境样本中微塑料的准确评估至关重要.
  • 需要标准化协议来解决污染和分析限制的问题.
  • 进一步的研究应该集中在改善检测极限和减少对微塑料分析的干扰.