title: Modification of a packed column gas chromatograph/mass spectrometer.
abstract: A packed-column gas-chromatograph/mass-spectrometer (GC/MS), Hewlett-Packard 5982, was modified to accommodate fused silica capillary columns. The original GC/MS interface and chemical-ionization sample-line in the ion-source were changed to allow the end of a fused silica capillary column to enter the ion-chamber directly. For chemical-ionization operation, the reagent gas was brought into the MS through the direct-insertion probe port. The calibration compound was introduced through the electron-impact sample-inlet, which simplified the operation. The modified system yields higher sensitivity and more efficient separation, as well as simpler operation, without sacrificing any original instrument functions.
authors.affiliation: Environmental Measurements Laboratory, U.S. Department of Energy, New York, New York 10014, U.S.A.
authors.forename: Y L
authors.initials: YL
authors.lastname: Tan
authors.forename: J F
authors.initials: JF
authors.lastname: Quanci