Jingke Ruida SP7800 Used Gas Chromatograph

Overview

The Jingke Ruida SP7800 is a used, fully functional gas chromatograph engineered for routine qualitative and quantitative analysis of volatile and semi-volatile organic compounds. Based on the fundamental principle of gas–solid or gas–liquid partition chromatography, the SP7800 separates analytes by differential migration through a temperature-controlled capillary or packed column under carrier gas flow (typically nitrogen, helium, or hydrogen). Detection is achieved via a flame ionization detector (FID), offering high sensitivity (detection limit ≤ 1×10⁻¹¹ g/s for n-decane), linear dynamic range of 10⁷, and stable baseline performance. Designed for laboratory environments with moderate throughput requirements—such as environmental monitoring labs, quality control departments in chemical manufacturing, and academic teaching facilities—the SP7800 delivers reproducible retention time precision (< 0.05 min RSD) and peak area repeatability (< 1.5% RSD, n=6) when operated within calibrated parameters.

Key Features

• Fully operational dual-channel configuration supporting simultaneous analysis with independent oven, detector, and injection port controls
• Programmable temperature ramping capability (oven range: 30–300 °C; ramp rate: 0.1–40 °C/min) with precise ±0.1 °C thermal stability
• Split/splitless injection system compatible with standard 4-mm glass or fused-silica liners and 10–1000 nL syringe volumes
• Integrated FID with auto-ignition, optimized air/hydrogen flow control, and real-time flame status monitoring
• Robust mechanical architecture featuring stainless-steel gas lines, leak-tested pneumatic modules, and ECD/FID interchangeable detector mounting
• Pre-installed GC control firmware enabling basic method setup, run sequencing, and data acquisition via RS-232 or USB interface

Sample Compatibility & Compliance

The SP7800 accommodates liquid, gaseous, and headspace-derived samples introduced via manual or autosampler injection. It supports common capillary columns (e.g., DB-5ms, HP-INNOWAX, RTX-1) with internal diameters from 0.25 to 0.53 mm and lengths up to 60 m. Column compatibility extends to packed formats (2–4 mm ID, 1–3 m length) for legacy method transfer. While originally designed to meet GB/T 30431–2013 (Chinese national standard for gas chromatographs), the instrument’s operational performance aligns with core elements of ISO 17025:2017 technical competence requirements when maintained per manufacturer-recommended protocols. It supports audit-ready documentation practices—including electronic logbooks and manual calibration records—suitable for GLP-regulated environments where full 21 CFR Part 11 compliance is not mandated.

Software & Data Management

The SP7800 operates with proprietary Jingke Ruida GC Workstation software (v3.2 or later), providing chromatogram visualization, peak integration (tangent skim, valley-to-valley, exponential curve fitting), calibration curve generation (linear, quadratic, or multi-point weighted), and report export in PDF, CSV, and TXT formats. Raw data files are stored in vendor-specific binary format (.DAT), convertible to open-access .CDF (NetCDF) via included utility tools. The software enables user-level access control (administrator/operator roles), method locking, and manual annotation of injection events—facilitating traceability in non-GMP settings. Though native support for LIMS integration is limited, ASCII-exported results can be ingested into third-party laboratory information management systems via scheduled file polling or API middleware.

Applications

• Environmental analysis: BTEX (benzene, toluene, ethylbenzene, xylene), chlorinated hydrocarbons, and pesticide residues in soil/water extracts
• Petrochemical QA/QC: Hydrocarbon group-type analysis (PIONA), gasoline oxygenate quantification (MTBE, ETBE), and refinery gas composition
• Pharmaceutical excipient testing: Residual solvent determination per ICH Q3C guidelines (Class 1–3 solvents)
• Food & flavor chemistry: Volatile aroma profiling, ethanol content verification, and adulterant screening in essential oils
• Academic instruction: Teaching fundamental chromatographic theory, retention indexing, resolution optimization, and detector response characterization

FAQ

Is the SP7800 compatible with modern capillary columns and standard GC consumables?
Yes—the instrument accepts industry-standard 1/16″ stainless-steel or graphite ferrules, universal column nuts, and common 0.25–0.53 mm ID fused-silica capillaries.
Does the unit include a validated calibration certificate?
No original factory certificate is included; however, pre-delivery verification includes retention time and area repeatability tests against certified n-alkane standards (C8–C20), documented in the inspection report.
Can the SP7800 be upgraded to support electronic pressure control (EPC)?
No—the SP7800 uses mechanical flow controllers and does not support hardware retrofitting for EPC; pressure regulation is performed manually via needle valves.
What maintenance history is available for this used unit?
Each unit undergoes full functional refurbishment: column oven calibration, detector sensitivity verification, leak testing, and firmware reset. A detailed service log covering the last 12 months is provided upon request.
Is remote operation or network connectivity supported?
The SP7800 lacks built-in Ethernet or Wi-Fi; remote control is limited to local PC connection via USB or RS-232 serial interface using the supplied workstation software.