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Is pentane a normal constituent of human breath?
1Laboratoire de Pharmacologie, Centre Hospitalier Universitaire 4, Angers, France.
Free Radical Research Communications
|January 1, 1993
Summary
Breath analysis measures volatile compounds. This study found normal pentane concentrations in human breath are below 10 pmol/L, differing from previous findings possibly due to isoprene interference.
Area of Science:
- Biochemistry
- Analytical Chemistry
- Human Physiology
Background:
- Breath analysis offers a non-invasive method to study human volatile organic compounds.
- Pentane is frequently used as a biomarker for lipid peroxidation.
- Accurate quantification of breath biomarkers is crucial for clinical applications.
Purpose of the Study:
- To establish the normal concentration of pentane in the breath of healthy individuals.
- To investigate potential reasons for discrepancies in previously reported pentane levels.
- To refine analytical methods for breath pentane measurement.
Main Methods:
- Utilized a highly specific and sensitive gas chromatography-mass spectrometry (GC-MS) technique.
- Collected breath samples from a cohort of healthy human subjects.
- Employed rigorous analytical procedures to ensure accurate pentane quantification.
Main Results:
- Normal pentane concentrations in human breath were determined to be below 10 pmol/L.
- Identified potential coelution of pentane with isoprene as a source of error in prior studies.
- Demonstrated the specificity of the GC-MS method for pentane detection.
Conclusions:
- The established normal range for breath pentane in healthy individuals is below 10 pmol/L.
- Previous reports of higher pentane levels may be attributed to analytical interference from isoprene.
- Accurate measurement of breath pentane requires methods that resolve interference from other volatile compounds.