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Related Concept Videos

Sample Preparation for Analysis: Advanced Techniques01:08

Sample Preparation for Analysis: Advanced Techniques

433
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...
433
Sample Preparation for Analysis: Overview01:21

Sample Preparation for Analysis: Overview

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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...
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Preparation of Samples for Electron Microscopy01:20

Preparation of Samples for Electron Microscopy

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To be visualized by an electron microscope, either transmission or scanning, biological samples need to be fixed (stabilized) so the electron beam does not destroy them and dried thoroughly (desiccated/dehydrated) so the vacuum does not affect them. Fixation needs to be done as quickly as possible because the sample properties will start changing as soon as it is removed from its natural environment. For example, in a tissue sample, the oxygen levels begin decreasing, causing an altered...
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Atomic Absorption Spectroscopy: Lab01:21

Atomic Absorption Spectroscopy: Lab

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For AAS measurements, samples must be introduced as clear solutions, often requiring extensive preliminary treatment to dissolve materials like soils, animal tissues, and minerals. Common methods for sample preparation include treatment with hot mineral acids, wet ashing, combustion in closed containers, high-temperature ashing, or fusion with reagents.
 Solutions containing organic solvents, such as low-molecular-mass alcohols, esters, or ketones, enhance absorbances by increasing...
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Atomic Emission Spectroscopy: Overview01:20

Atomic Emission Spectroscopy: Overview

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Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...
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Updated: Aug 29, 2025

Author Spotlight: Technologies and Challenges in Elemental Analysis of Food Samples
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Progress of environmental sample preparation for elemental analysis.

Yanhui Zhong1, Mengmeng Ji1, Yufei Hu1

  • 1School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China.

Journal of Chromatography. A
|September 8, 2022
PubMed
Summary
This summary is machine-generated.

This review covers environmental sample preparation methods for inorganic element analysis. It highlights phase separation, field-assisted acceleration, and integrated systems for accurate metallomics and environmental safety assessments.

Keywords:
Elemental analysisEnvironmental sample preparationField-assisted accelerationIntegration systemPhase separation

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Area of Science:

  • Environmental Science
  • Analytical Chemistry
  • Metallomics

Background:

  • Inorganic elements are crucial for environmental safety and metallomics.
  • Environmental samples (water, soil, air, food, waste) are complex matrices.
  • Effective sample preparation is essential for accurate instrumental analysis.

Purpose of the Study:

  • To review recent advancements in environmental sample preparation techniques.
  • To focus on methods for total elemental and speciation analysis.
  • To cover exemplified works published between 2017 and 2022.

Main Methods:

  • Phase separation strategies for isolating analytes.
  • Field-assisted acceleration techniques to enhance efficiency.
  • Integration system strategies for streamlined analysis.

Main Results:

  • Summarized three key environmental sample preparation strategies.
  • Highlighted methods offering selectivity, sensitivity, speed, and automation.
  • Presented recent developments in elemental and speciation analysis.

Conclusions:

  • Advanced sample preparation is vital for environmental and metallomics studies.
  • The reviewed strategies offer improved analytical performance.
  • Future research should focus on further optimizing these techniques.