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相关概念视频

Sample Preparation for Analysis: Overview01:21

Sample Preparation for Analysis: Overview

Sample preparation is an essential step in the analytical process. It involves preparing a sample so that it can be analyzed accurately. The goal is to extract the analyte, the substance you want to measure, from the sample while removing any components that may interfere with the analysis. Sample preparation techniques vary depending on the physical state of the sample.
Bulk or large solid samples are typically reduced in size using grinding, crushing, or milling techniques to increase the...
Sample Preparation for Analysis: Advanced Techniques01:08

Sample Preparation for Analysis: Advanced Techniques

Accurate analysis of complex samples often requires advanced preparation techniques to achieve reliable and reproducible results. Samples containing inorganic or organic materials can be challenging to dissolve or decompose effectively. Standard sample preparation methods include acid digestion, fusion, dry ashing, and wet digestion.
Acid digestion with strong acids is commonly used to dissolve inorganic materials that are insoluble (do not dissolve) in water. This method can be useful for...
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Microbial Bioremediation of Plastics

Polyethylene terephthalate (PET) is a synthetic polymer widely utilized in the packaging industry, particularly for bottles and containers. Due to its chemical stability and durability, PET accumulates in the environment, contributing significantly to plastic pollution. It comprises repeating units of terephthalic acid and ethylene glycol, resulting in a semi-crystalline structure that is resistant to natural degradation processes.A notable breakthrough in plastic biodegradation came with the...

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相关实验视频

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Protocol for Microplastics Sampling on the Sea Surface and Sample Analysis
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在土壤中分析微塑料的矩阵准备和工作流程.

Zhala Gachayzade1, Parisa Akbari Dana1, Ece Tuğba Mızık1

  • 1Eskişehir Technical University, Department of Environmental Engineering, 26555, Eskişehir, Türkiye.

Chemosphere
|March 8, 2025
PubMed
概括

本研究提出了一种用于微塑料 (MP) 分析的新土壤方法,改进了净化和量化. 开发的工作流程实现了对处女议员的80%的恢复,有助于精确的环境监测.

关键词:
现在开始计数.尼罗河红色染色 尼罗河红色染色拉曼光谱法 拉曼光谱法 拉曼光谱法代孕母亲是一个代孕母亲.陆地环境 地球上的环境

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科学领域:

  • 环境科学 环境科学
  • 分析化学 分析化学
  • 聚合物科学 聚合物科学

背景情况:

  • 缺乏在土壤中计数微塑料 (MP) 的标准化方法.
  • 正确的量化受到净化挑战和颗粒聚合的阻碍.

研究的目的:

  • 开发和验证用于土壤MP分析的矩阵准备和实验工作流程.
  • 通过使用替代聚合物和尼罗河红色染色来评估微塑料的回收率.
  • 为高效的MP量化提供一种工具方法.

主要方法:

  • 过氧化物消化和酸 (NaI) 密度分离用于土壤矩阵.
  • 为低密度聚乙烯 (LDPE) 和聚乙烯 (PVC) 替代品进行离心.
  • 光显微镜和拉曼光谱用于MP识别和量化.

主要成果:

  • 处女议员的平均恢复率为~80%;由于错误阳性结果导致染色的议员的平均恢复率为>100%.
  • 尼罗河红色染色显示了PE和PVC颗粒在预处理后的形态和光变化.
  • 快速拉曼光谱能够计数高达83%的MPs,显示出对小到单微米的粒子有希望.

结论:

  • 开发的工作流程增强了土壤矩阵中的MP净化和量化.
  • 由于聚合,小聚合物颗粒 (<300微米) 仍然存在挑战,影响光谱定量.
  • 进一步的研究应该集中在处理小MP粒子,以提高环境监测的准确性.