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Related Concept Videos

Sample Preparation for Analysis: Overview01:21

Sample Preparation for Analysis: Overview

304
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...
304
Sample Preparation for Analysis: Advanced Techniques01:08

Sample Preparation for Analysis: Advanced Techniques

434
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...
434
Sampling Methods: Sample Types01:18

Sampling Methods: Sample Types

369
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...
369
Atomic Absorption Spectroscopy: Atomization Methods01:25

Atomic Absorption Spectroscopy: Atomization Methods

634
Atomic Absorption Spectroscopy (AAS) atomizes samples through flame atomization or electrothermal atomization. Flame atomization typically involves a nebulizer and spray chamber assembly to combine the sample with a fuel–oxidant mixture, creating a fine aerosol mist that enters a burner. Typically, the fuel and oxidant are combined in an approximately stoichiometric ratio. However, for atoms that are easily oxidized, a fuel-rich mixture may be more advantageous. Only about 5% of the...
634
Gas Chromatography: Types of Detectors-II01:19

Gas Chromatography: Types of Detectors-II

488
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...
488
Atomic Absorption Spectroscopy: Lab01:21

Atomic Absorption Spectroscopy: Lab

536
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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Nitrogen Compound Characterization in Fuels by Multidimensional Gas Chromatography
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Sample Preparation and Analytical Methods for Identifying Organic Compounds in Bituminous Emissions.

Zachary Deller1, Subashani Maniam1, Filippo Giustozzi2

  • 1Applied Chemistry and Environmental Science, School of Science, STEM College, RMIT University, Melbourne, VIC 3001, Australia.

Molecules (Basel, Switzerland)
|August 26, 2022
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Summary

Heating bitumen releases harmful fumes, posing health risks. Analyzing these complex emissions requires careful selection of sample preparation and analytical techniques for accurate quantification of contaminants.

Keywords:
PAHsVOCsasphaltbitumenemissionsfumessample preparation

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Area of Science:

  • Environmental Science
  • Occupational Health
  • Analytical Chemistry

Background:

  • Bitumen, a key construction material, emits hazardous fumes when heated.
  • These fumes present significant health risks to construction workers and nearby communities.
  • The complex chemical composition of bitumen fumes, compounded by additives, complicates accurate analytical quantification.

Purpose of the Study:

  • To review and summarize existing methodologies for sample preparation and analytical techniques in bitumen emissions research.
  • To discuss the challenges associated with analyzing specific organic contaminants in bitumen fumes.
  • To explore future directions and potential solutions for optimizing the analysis of bitumen emissions.

Main Methods:

  • Literature review of sample preparation techniques for bitumen emissions.
  • Analysis of various instrumental configurations for quantifying organic contaminants.
  • Synthesis of current research on analytical methods for bitumen fume analysis.

Main Results:

  • Numerous sample preparation and analytical methods are employed in bitumen emissions research.
  • Optimizing analysis requires careful consideration of sample preparation and instrumental setup.
  • A range of analytical techniques may be necessary to fully characterize harmful chemicals and assess additives.

Conclusions:

  • Accurate quantification of harmful chemicals in bitumen emissions is challenging due to fume complexity and additives.
  • Selecting appropriate sample preparation and analytical techniques is crucial for effective research.
  • Further research is needed to address future challenges in analyzing bitumen emissions and additive efficacy.