Gas chromatograph mass spectrometer

Details Gas chromatograph mass spectrometer Gas chromatograph mass spectrometer

2007-11-13

2007-11-13

Smith, Duane (Department: 1724)

Gas separation: apparatus

Chromatography type apparatus

Having system connector or coupling

C073S023370

Reexamination Certificate

active

11087666

ABSTRACT:
An interface placed between a gas chromatograph part and a mass spectrometer part of a gas chromatograph mass spectrometer for allowing one or two columns to pass air-tightly from the gas chromatograph part to the mass spectrometer part. The interface includes: a heat-retention block having a small-diameter hole allowing two columns to pass through; a single-hole ferrule having a small-diameter hole allowing a single column to pass through; and a two-hole ferrule having two small-diameter holes allowing two columns to respectively pass through. An adapter is placed between the heat-retention block and the two-column nut. It includes a long large-diameter opening allowing two columns passing through the two-hole ferrule to converge on the small-diameter hole of the heat-retention block. The interface also includes a single-column nut for pressing the single-hole ferrule to the heat-retention block; and a two-column nut for pressing the two-hole ferrule to the adapter.

REFERENCES:
patent: 4641541 (1987-02-01), Sharp
patent: 6247731 (2001-06-01), Stearns et al.
patent: 2006/0123883 (2006-06-01), Miyagawa
patent: 10-283982 (1998-10-01), None
patent: 2001-208740 (2001-08-01), None
patent: WO 01/73338 (2001-10-01), None
Nyholm et al., “High-temperature open tubular liquid chromatography coupled to atmospheric pressure chemical ionization mass spectrometry”; Journal of Chromatography A, Elsevier, Amsterdam. NL, vol. 755, No. 2, Dec. 6, 1996, pp. 153-164, XP004014701.

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