Related Experiment Video
Updated: Jun 28, 2026

Measuring Dissolved Methane in Aquatic Ecosystems Using An Optical Spectroscopy Gas Analyzer
Published on: July 26, 2024
Measuring trihalomethane concentrations in water using supported capillary membrane sampling-gas chromatography.
Gary L Emmert1, Gang Cao, Chris Duty
1Department of Chemistry, The University of Memphis, Memphis, TN 38152, USA.
This study introduces a new method using supported capillary membrane sampling coupled with gas chromatography for detecting trihalomethanes (THMs) in drinking water. The research details optimal conditions for accurate and precise THM analysis.
Area of Science:
- Environmental Chemistry
- Analytical Chemistry
- Water Quality Analysis
Background:
- Trihalomethanes (THMs) are common disinfection byproducts in drinking water.
- Accurate monitoring of THMs is crucial for public health and regulatory compliance.
- Existing analytical methods may require improvements in efficiency and sensitivity.
Purpose of the Study:
- To develop and validate a supported capillary membrane sampling-gas chromatography (SCMS-GC) method.
- To analyze trihalomethanes (THMs) in drinking water samples.
- To optimize experimental parameters for enhanced analytical performance.
Main Methods:
- Utilized supported capillary membrane sampling for sample introduction.
- Employed gas chromatography (GC) for separation and detection of THMs.
- Investigated effects of carrier gas flow rate, water temperature, ionic strength, and transfer line temperature.
Main Results:
- Established a novel SCMS-GC method for THM analysis.
- Identified optimal conditions for carrier gas flow rate, water temperature, ionic strength, and transfer line temperature.
- Reported method detection limits, accuracy, and precision data.
Conclusions:
- The developed SCMS-GC method is effective for analyzing THMs in drinking water.
- Optimization of parameters ensures reliable and sensitive detection.
- This method offers a valuable tool for water quality monitoring.
More Related Videos
04:19An Improved Technique for Trimethylamine Detection in Animal-Derived Medicine by Headspace Gas Chromatography-Tandem Quadrupole Mass Spectrometry
Published on: March 10, 2023
11:44Qualitative Characterization of the Aqueous Fraction from Hydrothermal Liquefaction of Algae Using 2D Gas Chromatography with Time-of-flight Mass Spectrometry
Published on: March 6, 2016
Related Concept Videos
Gas Chromatography: Types of Detectors-I
TCD is the earliest and most widely used detector that operates by measuring the changes in the thermal conductivity of the carrier gas. When a sample compound enters the detector,...
Gas Chromatography–Mass Spectrometry (GC–MS)
A gas chromatograph consists of a long, narrow capillary column with a polysiloxane coating on the inner wall. The coating...
Gas Chromatography: Introduction
In GC, a sample is vaporized and mixed with an inert carrier gas (the mobile phase), which transports it through a column.
Gas Chromatography: Types of Detectors-II
Gas Chromatography: Overview of Detectors
A non-destructive detector allows a sample to be analyzed without altering or consuming it, meaning the sample can be collected after detection for further analysis. Examples include thermal conductivity detectors and...
Gas Chromatography: Sample Injection Systems
Two primary injection methods are used...