Agilent 6890-5975 GCMS system

The Agilent 6890N GC – 5975 Inert XL MSD Gas Chromatograph/Mass Spectrometer (GC/MS) system is a fully integrated, high-performance analytical platform designed for the qualitative identification, structural elucidation, and precise quantification of volatile and semi-volatile organic compounds across environmental monitoring, forensic toxicology, food safety, pharmaceutical R&D, and petrochemical laboratories. At its core, the Agilent 6890N Network GC delivers exceptional separation power through fourth-generation Electronic Pneumatic Control (EPC) that regulates carrier gas pressure to 0.01 psi and flow to 0.1 mL/min, supporting Retention Time Locking (RTL) for seamless method transfer. Its ovens operate from 4 °C above ambient up to 450 °C with programmable ramp rates up to 120 °C/min and accommodate dual capillary columns. A split/splitless capillary inlet is standard, and the system is equipped with a Flame Ionization Detector (FID) offering a linear dynamic range exceeding 10⁷, enabling simultaneous high-precision quantification alongside mass spectral identification from a single injection when configured with a multiplexed effluent stream. The 5975 Inert XL Mass Selective Detector (MSD) features an inert Extractor EI ion source with a molybdenum-alloy coated chamber to minimize adsorption and degradation of polar or thermally labile analytes, a gold-plated hyperbolic quartz quadrupole mass filter (1.6–1050 amu, scanning at up to 10,000 amu/sec), and a High Energy Dynode Electron Multiplier (HED-EM) capable of sub-femtogram detection limits (typical S/N ≥ 20:1 for 1 pg octafluoronaphthalene in full scan). The MSD is backed by a high-throughput turbomolecular pump (typically 70 L/s or 262 L/s) coupled with an Edwards-type Duo two-stage rotary vane rough pump that provides stable foreline vacuum and reduced oil backstreaming. Sample introduction is automated by the Agilent 7683B Automatic Liquid Sampler (ALS), comprising an injector tower and a removable 100-vial tray (expandable), with programmable injection volumes from 0.1 µL to 50 µL (up to 100 µL with larger syringes), <0.5% RSD repeatability, variable draw/eject speeds, vial penetration depth adjustment, and optional tray heating/cooling (5–60 °C with external circulator). System operation, data acquisition, library searching (NIST/Wiley), and quantitative reporting are managed via Agilent MSD ChemStation or MassHunter Workstation software. This configuration—dual-detection GC coupled to an inert XL MSD with autosampler and complete vacuum train—offers outstanding sensitivity for active compounds, excellent long-term stability, and walk-away throughput for high-volume routine and research applications.

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