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Related Concept Videos

Sample Preparation for Analysis: Overview01:21

Sample Preparation for Analysis: Overview

398
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...
398
Sample Preparation for Analysis: Advanced Techniques01:08

Sample Preparation for Analysis: Advanced Techniques

502
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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Gas Chromatography: Sample Injection Systems01:08

Gas Chromatography: Sample Injection Systems

695
In gas chromatography, the sample is introduced as a vapor plug into the carrier gas stream for high efficiency and resolution. A microsyringe injects the sample solution into a heated sample port, vaporizing it and mixing it with the carrier gas. This process is important to ensure the sample is properly prepared for analysis. Thermally sensitive samples can be injected directly into the column and volatilized by slowly increasing the column temperature.
Two primary injection methods are used...
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High-Performance Liquid Chromatography: Elution Process01:05

High-Performance Liquid Chromatography: Elution Process

805
In High-Performance Liquid Chromatography (HPLC), the elution process is critical to the separation of analytes and the quality of chromatographic results. Elution describes how compounds move through the column and separate based on their interactions with the mobile and stationary phases. This process determines the resolution, peak shape, and retention times in the chromatogram, which are essential for identifying and quantifying components in complex mixtures. Understanding the elution...
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Updated: Oct 10, 2025

Sample Preparation for Probe Electrospray Ionization Mass Spectrometry
05:47

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Sample Preparation in Ion-chromatography.

William F Koch1

  • 1Center for Analytical Chemistry, National Bureau of Standards Washington, D.C. 20234.

Journal of Research of the National Bureau of Standards (1977)
|December 9, 2021
PubMed
Summary
This summary is machine-generated.

Ion-chromatography is a promising analytical technique for trace anion analysis, especially in microanalysis. Effective sample preparation, including resin pretreatment, is crucial for accurate speciation and quantitation in complex matrices like waste oil and oyster tissue.

Keywords:
Conductivityion-chromatographyion-exchangeliquid chromatographyoiloyster

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Area of Science:

  • Analytical Chemistry
  • Environmental Science

Background:

  • Ion-chromatography (IC) is an emerging analytical technique.
  • IC shows promise for complex trace analysis, particularly anion speciation and quantitation.
  • IC is well-suited for microanalysis applications.

Purpose of the Study:

  • To highlight the critical role of sample preparation in ion-chromatography.
  • To demonstrate the application of IC to complex matrices.
  • To discuss pretreatment methods for enhanced analytical accuracy.

Main Methods:

  • Sample preparation modifications for ion-chromatography compatibility.
  • Application of ion-chromatography for chloride and bromide determination.
  • Use of polystyrene and ion-exchange resins for sample pretreatment.

Main Results:

  • Successful determination of chloride and bromide in waste oil.
  • Analysis of oyster tissue using ion-chromatography.
  • Evaluation of resin-based pretreatment techniques.

Conclusions:

  • Sample preparation is a critical factor for successful ion-chromatography.
  • Ion-chromatography, with appropriate sample preparation, can be applied to complex matrices.
  • Resin pretreatment methods enhance the capacity of ion-chromatography for trace anion analysis.