Development and application of a milli-whistle for use in gas chromatography detection

Cheng Huang Lin, Chien Hung Lin, Yi Shiuan Li, Yi San He

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A simple milli-whistle was developed for the use in GC (gas chromatography) detection, in which, compared to a thermal conductivity detector (TCD), 1 order of magnitude superior sensitivity can be obtained. The milli-whistle can be connected to the outlet of a GC capillary. The gas and makeup gas passing through the capillary produces a sound as it passes through the milli-whistle (i.e., the gas of the GC eluate). The sound can easily be detected by a microphone, which, after a Fourier transform (FT) by means of a LabVIEW (Laboratory Virtual Instrumentation Engineering Workbench) built-in program, a very sharp frequency peak (full width at half-maximum, ∼1.6 Hz) can be simultaneously observed. As a result, GC elutes can be qualitatively determined on the basis of their retention times, and a quantitative analysis can be achieved on the basis of the frequency shifts. When the makeup and carrier gases used were nitrogen, in the case of gas samples, including hydrogen, helium, argon, and carbon dioxide, the limits of detection were found to be ∼3 μL/each injection; in the case of liquid samples, including methanol, cyclohexane, tetrahydrofuran, hexane, and acetone, the limits of detection were determined to be ∼10 μg/each injection, respectively. When the gases were changed to hydrogen, the limits of detection were dramatically improved. When acetone was selected as the model sample, a linear relationship was found in the range of 0.2-200 μg/injection.

Original languageEnglish
Pages (from-to)7467-7471
Number of pages5
JournalAnalytical Chemistry
Volume82
Issue number17
DOIs
Publication statusPublished - 2010 Sep 1

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Gas chromatography
Gas Chromatography
Gases
Limit of Detection
Acetone
Injections
Hydrogen
Acoustic waves
Thermal Conductivity
Helium
Argon
Hexanes
Fourier Analysis
Microphones
Full width at half maximum
Carbon Dioxide
Methanol
Thermal conductivity
Fourier transforms
Nitrogen

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

Development and application of a milli-whistle for use in gas chromatography detection. / Lin, Cheng Huang; Lin, Chien Hung; Li, Yi Shiuan; He, Yi San.

In: Analytical Chemistry, Vol. 82, No. 17, 01.09.2010, p. 7467-7471.

Research output: Contribution to journalArticle

Lin, Cheng Huang ; Lin, Chien Hung ; Li, Yi Shiuan ; He, Yi San. / Development and application of a milli-whistle for use in gas chromatography detection. In: Analytical Chemistry. 2010 ; Vol. 82, No. 17. pp. 7467-7471.
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