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Gas Chromatography: Sample Injection Systems01:08

Gas Chromatography: Sample Injection Systems

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...
High-Performance Liquid Chromatography: Instrumentation00:57

High-Performance Liquid Chromatography: Instrumentation

High-performance liquid chromatography, or HPLC, is an analytical technique that separates liquid samples under high pressures. An HPLC instrument consists of glass bottles for storing solvents called mobile phase reservoirs. HPLC-grade solvents are used to maintain high purity, and the dissolved gases are removed using a degasser, such as a vacuum pumping system or sparging with helium. The solvents are then pumped into the analytical column using a screw-driven syringe or reciprocating pumps.
Inductively Coupled Plasma–Mass Spectrometry (ICP–MS): Overview01:19

Inductively Coupled Plasma–Mass Spectrometry (ICP–MS): Overview

In inductively coupled plasma–mass spectrometry (ICP–MS), an inductively coupled plasma (ICP) torch is used as an atomizer and ionizer. Solid samples are dissolved and volatilized before being introduced into the high-temperature argon plasma, while solution samples are nebulized and passed through the high-temperature argon plasma. Plasma dissociates the analytes and ionizes their component atoms to form a mixture of positive ions and molecular species. The positive ions are then passed on to...
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...
Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle01:19

Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle

Inductively coupled plasma (ICP) is the most widely used plasma source in atomic emission spectroscopy (AES), also known as Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). The ICP source, or torch, consists of three concentric quartz tubes with argon gas flowing through them. A spark from a Tesla coil initiates the ionization of argon, generating a high-temperature plasma.
The ions and electrons produced interact with the fluctuating magnetic field created by a water-cooled...

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A software package for computer-controlled flow-injection analysis.

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Related Experiment Video

Updated: Jun 28, 2026

Quantitative Detection of Trace Explosive Vapors by Programmed Temperature Desorption Gas Chromatography-Electron Capture Detector
07:57

Quantitative Detection of Trace Explosive Vapors by Programmed Temperature Desorption Gas Chromatography-Electron Capture Detector

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A forth package for computer-controlled flow-injection analysis.

F T Dohmen1, P C Thijssen

  • 1Department of Analytical Chemistry, University of Nijmegen, Toernooiveld, 6525ED Nijmegen, The Netherlands.

Talanta
|February 1, 1986
PubMed
Summary
This summary is machine-generated.

This study details an automated flow-injection system for efficient sample analysis. The user-friendly software is adaptable to various computers, enhancing laboratory workflows.

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Area of Science:

  • Analytical Chemistry
  • Laboratory Automation

Background:

  • Traditional sample analysis can be time-consuming and prone to errors.
  • The need for efficient and adaptable automated systems in scientific research is growing.

Purpose of the Study:

  • To describe an automated flow-injection system for enhanced laboratory efficiency.
  • To present a flexible software solution compatible with various computing platforms.

Main Methods:

  • Development of an automated flow-injection system integrating a computer-controlled sample changer, injection device, and digital photometer.
  • Implementation of a software interface utilizing the FORTH programming language for system control and data acquisition.
  • Adaptation of the system for use with an Apple II computer.

Main Results:

  • Successful implementation of a fully automated flow-injection analysis system.
  • Demonstration of the software's understandability, flexibility, and adaptability to different computer systems.
  • Validation of the system's capability for efficient and reliable sample analysis.

Conclusions:

  • The described automated flow-injection system offers a robust and adaptable solution for analytical laboratories.
  • The FORTH-based software provides a flexible platform for controlling automated analytical instrumentation.
  • This automation enhances laboratory throughput and potentially reduces analytical errors.