Related Experiment Video
Updated: Jul 6, 2026
10:04
Flame Experiments at the Advanced Light Source: New Insights into Soot Formation Processes
Published on: May 26, 2014
An improved interface for universal acoustic flame detection in modified supercritical fluid chromatography
Christine Mah1, Kevin B Thurbide
1Department of Chemistry, University of Calgary, Calgary, Canada.
Journal of Separation Science
|April 3, 2008
Summary
A new heated interface improves acoustic flame detection (AFD) in supercritical fluid chromatography (SFC). This method significantly reduces noise and stabilizes detector performance for reliable analysis.
Area of Science:
- Analytical Chemistry
- Chromatography Science
Background:
- Acoustic flame detection (AFD) can suffer from noise and baseline drift in modified supercritical fluid chromatography (SFC).
- These issues can lead to peak deformations and unreliable analytical results.
Purpose of the Study:
- To develop and present a novel heated interface for improved AFD performance in modified SFC.
- To eliminate sporadic noise and baseline instability associated with AFD in SFC.
Main Methods:
- A resistive heating element was applied to the burner region of the AFD interface.
- The interface temperature was optimized to reduce detector noise.
- Performance was evaluated using various methanol-modified supercritical carbon dioxide mobile phases.
Main Results:
- The heated interface effectively eliminated severe noise, baseline drifting, and peak deformations.
- Detector noise was reduced nearly ten-fold, achieving smooth and stable AFD operation.
- Noise levels were consistently reduced to a minimal range of 10-25 Hz across different mobile phase compositions.
Conclusions:
- The developed heated interface provides a simple, inexpensive, and robust solution for reliable AFD operation in modified SFC.
- This advancement supports the use of AFD as a universal detector in separations utilizing organic cosolvents.
Related Concept Videos
01:18Supercritical Fluid Chromatography
Supercritical fluid chromatography (SFC) provides a beneficial substitute for gas chromatography (GC) and liquid chromatography (LC) for certain samples because it merges the top attributes of both techniques. SFC allows the separation and analysis of compounds that GC or LC does not easily manage. These compounds are traditionally nonvolatile or thermally unstable, making GC unsuitable and lacking functional groups required for HPLC analysis.
SFC utilizes a supercritical fluid mobile phase,...
SFC utilizes a supercritical fluid mobile phase,...
01:21Gas Chromatography: Types of Detectors-I
There are different types of detectors used in gas chromatography, each with its own specific properties that make it suitable for detecting certain types of analytes. The most commonly used detectors in GC are thermal conductivity detector (TCD), flame ionization detector (FID), and electron capture detector (ECD).
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,...
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,...
01:19Gas 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...
01:02Flame Photometry: Overview
Flame photometry, also known as flame emission spectrometry, is a technique used for the qualitative and quantitative analysis of elements present in a sample using a flame as the source of excitation energy. The concept of flame photometry was realized in the early 1860s by Kirchhoff and Bunsen, who discovered that specific elements emit characteristic radiation when excited in flames. The first instrument developed for this purpose was used to measure sodium (Na) in plant ash using a Bunsen...
01:15High-Performance Liquid Chromatography: Types of Detectors
The role of the detectors in High-Performance Liquid Chromatography (HPLC) is to analyze the solutes as they exit from the chromatographic column. The detector recognizes the solute's property and generates corresponding electrical signals, which are converted into a readable graph of the detector's response versus elution time called a chromatogram at the computer. There are several types of HPLC detectors, each with its own advantages and limitations, depending on the analyte properties and...
01:13Gas Chromatography: Overview of Detectors
Detectors in gas chromatography (GC) help identify and quantify the components of a mixture by translating chemical properties into measurable signals, which are displayed on a chromatogram. Detectors can be categorized into two main types: destructive and non-destructive.
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...
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...