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Related Concept Videos

Sampling Methods: Sample Types01:18

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Sampling materials are classified into three main types: solid, liquid, and gas.
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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.
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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.
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Deposition of Porous Sorbents on Fabric Supports
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Sample preparation under turbulent flow with renewable sorbent.

David J Cocovi-Solberg1, Stephan Schnidrig2, Stephan Hann1

  • 1University of Natural Resources and Life Sciences, Vienna Muthgasse 18 1190 Vienna Austria david.cocovi-solberg@boku.ac.at +43 1 47654 77109.

Journal of Analytical Atomic Spectrometry
|November 12, 2021
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Summary
This summary is machine-generated.

This study introduces a cost-effective turbulent flow chromatography (TFC) method for sample preparation, enhancing throughput for techniques like inductively coupled plasma mass spectrometry (ICP-MS). The new approach uses readily available components and real-time pressure feedback for unattended operation.

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Area of Science:

  • Analytical Chemistry
  • Chromatography
  • Mass Spectrometry

Background:

  • Turbulent flow chromatography (TFC) offers universal sample preparation for mass spectrometry but requires specialized hardware and consumables.
  • Existing TFC methods are limited by cost and complexity, hindering widespread adoption.

Purpose of the Study:

  • To develop and characterize a cost-effective TFC method using off-the-shelf components and bead injection.
  • To demonstrate unattended operation and high sample throughput for TFC-based sample preparation.
  • To showcase the application of this TFC method for environmental analysis, specifically gadolinium fractionation.

Main Methods:

  • Application of turbulent flow chromatography (TFC) using bead injection and standard fluidic components.
  • Operation at elevated pressure (approx. 20 bar) for enhanced performance.
  • Implementation of real-time pressure feedback for automated sorbent packing/unpacking.
  • Characterization of TFC principles and performance metrics.
  • Demonstration of in-valve acidification for sample preparation.

Main Results:

  • Achieved high sample throughput (>285 h⁻¹ for SPE/TFC, 20 h⁻¹ with sorbent renewal) using minimal sorbent (4 mg).
  • Successfully implemented unattended operation with real-time pressure feedback for quality control.
  • Demonstrated comparable performance to existing TFC methods.
  • Successfully fractionated gadolinium in surface water samples prior to ICP-MS analysis.

Conclusions:

  • The developed TFC method provides a cost-effective and efficient alternative for sample preparation.
  • Automated operation and high throughput make this method suitable for routine analysis.
  • The technique is effective for environmental monitoring, exemplified by gadolinium fractionation in surface waters.