In the packaging printing industry—especially for flexible packaging used in food, pharmaceuticals, and other direct-contact applications—solvent residue has long been a sword of Damocles hanging over manufacturers. Residual solvents not only compromise the physical properties of packaging materials but also risk migrating into the packaged products, posing potential health hazards. Benzene compounds, in particular, have been classified as carcinogens by the World Health Organization. Reducing or eliminating benzene-based solvent residues has therefore become a critical challenge that flexible packaging companies must address.
To tackle this industry-wide pain point, Guangzhou Shounuo Scientific Instrument Co., Ltd.—a high-tech enterprise established in 2011, specializing in the R&D and manufacturing of flexible packaging testing equipment—has launched the GC-05E Gas Chromatograph. This is a professional-grade analytical instrument independently developed specifically for the flexible packaging sector, and it strictly complies with key national and industry standards including QB/T 2929, GB/T 10004, and YBB 00132002.
GC-05E Gas Chromatograph for Solvent Residue Testing
Precise and Comprehensive Solvent Residue Detection
The core functionality of the GC‑05E gas chromatograph addresses two critical tasks: (1) accurately assessing overall solvent residue levels in packaging printing, and (2) precisely determining the purity and composition of various solvents.
The instrument efficiently separates and detects a broad spectrum of solvents commonly encountered in flexible packaging printing, including:
- Esters: ethyl acetate, isopropyl acetate, n-butyl acetate, etc.
- Ketones: cyclohexanone, etc.
- Alcohols: ethanol, isopropanol, propanol, butanol, n-butanol, etc.
- Aromatic hydrocarbons: benzene, toluene, xylene, ethylbenzene, etc.
- Others: 4-methyl-2-pentanone, aniline phosphorus, etc.
Whether for solvent residue testing in ink printing or for analysing solvent residues in laminates, metallised films, paper-plastic composites, and other packaging materials, the GC‑05E delivers reliable, reproducible data.
Advanced Technology, Intelligent Operation
The GC‑05E gas chromatograph uses a high‑purity inert gas as the mobile phase and employs chromatographic column separation technology—sample components are effectively separated in the column based on differences in partition coefficients, then detected by a highly sensitive detector (such as the Flame Ionization Detector, FID) and converted into electrical signals. Qualitative and quantitative analyses are performed by an intelligent workstation.
Key design features tailored for the industry include:
- Smart interaction: Equipped with a 7‑inch colour touchscreen and a next‑generation intelligent operating system, the instrument offers an intuitive, smartphone‑like interface that simplifies operation.
- Precise temperature control: Microprocessor‑controlled column oven with a temperature range from ambient+5°C to 300°C and accuracy of 0.1°C. An automatic post‑door cooling system enables programmed temperature ramping, ensuring faster heating and cooling rates.
- Flexible configuration: Supports up to multiple detectors simultaneously; can be equipped with packed column injectors, capillary column injectors, automatic liquid samplers, headspace autosamplers, and other accessories.
- Safety and reliability: Built‑in self‑diagnosis function instantly displays fault locations and nature; dual over‑temperature protection automatically shuts off heating and triggers an alarm if any temperature exceeds the setpoint.
- Quiet and comfortable: An advanced noise‑suppression system virtually eliminates fan noise, creating a pleasant, low‑noise working environment.
Robust Specifications for Accurate Analysis
The technical parameters underscore the GC‑05E’s solid performance:
- FID detection limit: ≤1×10⁻¹³ g/s
- Baseline drift: ≤0.2 mV/0.5h, noise: ≤0.2 mV
- Quantitative repeatability (RSD): ≤1%
- Column oven temperature range: ambient+5°C to 300°C
- Programmed heating rate: 0.1–25°C/min
- Column oven cooling rate: ≤9 min (from 300°C down to 70°C)
Broad Applicability and Compliance Assurance
The GC‑05E gas chromatograph is widely applicable in packaging, food, pharmaceuticals, new materials, chemicals, and printing industries. The standard package includes the main unit, dedicated chromatographic columns, and essential accessories. Users only need to supply a computer, analytical-grade alcohols, and gases (nitrogen, hydrogen, and air) with pressure regulators set to 0.35–0.4 MPa to quickly establish a professional testing platform.
Conclusion
With increasingly stringent food safety regulations and growing consumer awareness of health issues, precise solvent residue testing has become an indispensable requirement for flexible packaging companies. Guangzhou Shounuo’s GC‑05E gas chromatograph is more than just a high-performance analytical instrument—it is a complete solution for solvent residue detection in packaging printing. By combining specialised design, intelligent operation, and outstanding analytical performance, it empowers companies across the packaging value chain to ensure product safety and compliance, confidently meeting both domestic and international quality standards.
