Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Gas Chromatography: Introduction

Gas Chromatography: Introduction

Gas chromatography (GC) is a technique for separating and analyzing volatile compounds in a sample. Its primary purpose is to identify and quantify components in complex mixtures, making it essential in fields such as environmental analysis, pharmaceuticals, and petrochemicals. GC is also called vapor-phase chromatography (VPC) or gas-liquid partition chromatography (GLPC).
In GC, a sample is vaporized and mixed with an inert carrier gas (the mobile phase), which transports it through a column.

Sampling Methods: Sample Types

Sampling Methods: Sample Types

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...

Gas Chromatography–Mass Spectrometry (GC–MS)

Gas Chromatography–Mass Spectrometry (GC–MS)

Gas chromatography–mass spectrometry (GC–MS) is the combination of analytical techniques of gas chromatography and mass spectrometry in a single instrument for analyzing a mixture of compounds. The gas chromatograph separates the compounds in the mixture, and the mass spectrometer analyzes each compound separately to determine the molecular masses and molecular structures.
A gas chromatograph consists of a long, narrow capillary column with a polysiloxane coating on the inner wall. The coating...

Adsorption of Gases on Solids

Adsorption of Gases on Solids

Adsorption is a process where molecules, known as the adsorbates, accumulate on a surface, which is referred to as the adsorbent or substrate. Occurring at the solid-gas interface, this phenomenon is crucial in various scientific and industrial contexts. The reverse of adsorption is desorption.Two types of adsorptions exist: physical (physisorption) and chemical (chemisorption). Physisorption involves gas molecules held to the solid's surface by relatively weak intermolecular van der Waals...

Analyte Adsorption and Distribution

Analyte Adsorption and Distribution

In certain chromatographic separations, solutes transfer between the mobile phase and the stationary phase via sorption, which typically refers to the process of adsorption. For many chromatographic systems, the sorption process often depends on the polarity of the compounds—an expression of the overall dipole moment within the molecule. During the separation process, there is competition between the solute and solvent for adsorption to the stationary phase. Highly polar compounds and solvents...

Gas Chromatography: Types of Detectors-II

Gas Chromatography: Types of Detectors-II

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...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

The effect of an alternate environment as a collection medium on the permeation characteristics of solid organics through protective glove materials.

American Industrial Hygiene Association journal·1994

Same author

Protective glove material permeation by organic solids.

American Industrial Hygiene Association journal·1992

Same author

The representation and integration in memory of spatial and nonspatial information.

Memory & cognition·1992

Same author

Spatial and temporal contributions to the structure of spatial memory.

Journal of experimental psychology. Learning, memory, and cognition·1992

Same author

A multiple mass spectral line method for determining positional specific activities in stable isotope-labeled amino acids.

Analytical biochemistry·1991

Same author

Method for the determination of the priority pollutant metals by HPLC.

Journal of chromatographic science·1990

Search research articles

Related Experiment Video

Updated: Jun 28, 2026

Rapid Collection of Floral Fragrance Volatiles using a Headspace Volatile Collection Technique for GC-MS Thermal Desorption Sampling

Rapid Collection of Floral Fragrance Volatiles using a Headspace Volatile Collection Technique for GC-MS Thermal Desorption Sampling

Published on: December 10, 2019

Permeation-solid adsorbent sampling and GC analysis of formaldehyde.

C Muntuta-Kinyanta¹, J K Hardy

¹Department of Chemistry, The University of Akron, Akron, Ohio 44325-3601, U.S.A.

|December 1, 1991

Summary

This summary is machine-generated.

This study introduces a passive air sampling method for formaldehyde using membrane permeation. The developed device accurately measures time-weighted-average (TWA) formaldehyde concentrations, offering a convenient and economical solution for air quality monitoring.

More Related Videos

Gas Chromatography-Mass Spectrometry Paired with Total Vaporization Solid-Phase Microextraction as a Forensic Tool

Gas Chromatography-Mass Spectrometry Paired with Total Vaporization Solid-Phase Microextraction as a Forensic Tool

Published on: May 25, 2021

A Synthetic Methodology for Preparing Impregnated and Grafted Amine-Based Silica Composites for Carbon Capture

A Synthetic Methodology for Preparing Impregnated and Grafted Amine-Based Silica Composites for Carbon Capture

Published on: September 29, 2023

Related Experiment Videos

Last Updated: Jun 28, 2026

Rapid Collection of Floral Fragrance Volatiles using a Headspace Volatile Collection Technique for GC-MS Thermal Desorption Sampling

Rapid Collection of Floral Fragrance Volatiles using a Headspace Volatile Collection Technique for GC-MS Thermal Desorption Sampling

Published on: December 10, 2019

Gas Chromatography-Mass Spectrometry Paired with Total Vaporization Solid-Phase Microextraction as a Forensic Tool

Gas Chromatography-Mass Spectrometry Paired with Total Vaporization Solid-Phase Microextraction as a Forensic Tool

Published on: May 25, 2021

A Synthetic Methodology for Preparing Impregnated and Grafted Amine-Based Silica Composites for Carbon Capture

A Synthetic Methodology for Preparing Impregnated and Grafted Amine-Based Silica Composites for Carbon Capture

Published on: September 29, 2023

Area of Science:

Environmental Chemistry
Analytical Chemistry
Occupational Health

Background:

Formaldehyde is a common indoor and outdoor air pollutant.
Accurate measurement of time-weighted-average (TWA) formaldehyde concentrations is crucial for assessing exposure risks.
Existing methods may be complex or costly for widespread use.

Purpose of the Study:

To develop and validate a passive sampling method for determining TWA formaldehyde concentrations in air.
To assess the performance and reliability of the developed sampling device.
To provide an economical and convenient alternative for formaldehyde monitoring.

Main Methods:

A passive sampling device utilizing a dimethyl silicone membrane for formaldehyde permeation.
Reaction of permeated formaldehyde with 2-(hydroxymethyl)piperidine (2-HMP) on XAD-2 adsorbent.
Thermal desorption and analysis using gas chromatography with a flame ionization detector (GC-FID).

Main Results:

The method demonstrated a linear response to formaldehyde concentrations from 0.050-100 ppm.
A permeation constant of 0.333 µg ppm⁻¹ hr⁻¹ was determined.
The detection limit was 0.03 ppm for an 8-hour sampling period.
The method showed robustness against variations in relative humidity, temperature, and storage duration, with no significant interference from acetone or acrolein.

Conclusions:

The passive membrane permeation sampling method provides accurate TWA formaldehyde concentrations.
The device is economical, convenient, and suitable for personal or multi-location air sampling.
This method offers a reliable tool for occupational and environmental formaldehyde exposure assessment.