Micro flame detector and method for gas chromatography
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United States of America Patent
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Issued Date -
Dec 29, 2005
app pub date -
Dec 22, 2004
filing date -
Jun 25, 2004
priority date (Note) -
Abandoned
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Abstract
A micro counter-current flame detector is provided that is both sensitive for photometric and ionization detection for gas chromatography (GC). In the detector, a stainless steel capillary (0.01' i.d.) supplying oxygen functions as a burner, which supports a compact flame that burns in a counter-flowing excess of hydrogen. In the 'micro Flame Photometric Detector' (.mu.FPD) response mode, the background emission level is reduced by over an order of magnitude compared to previous experiments using a fused silica capillary burner, resulting in greatly improved detection limits. The device can successfully operate as both a selective and universal GC detector. Results indicate that this micro counter-current flame method yields comparable performance to conventional Flame Photometric and Flame Ionization Detectors.
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