Zhongyi Yusheng HS-7910A Fully Automated Static Headspace Sampler

Overview

The Zhongyi Yusheng HS-7910A is a fully automated static headspace sampler engineered for precise, reproducible volatile organic compound (VOC) analysis in compliance with internationally recognized environmental, clinical, pharmaceutical, and industrial testing protocols. It operates on the principle of static headspace equilibrium: a sealed 20 mL sample vial is heated to a user-defined temperature, allowing analytes to partition into the vapor phase above the sample matrix. After thermal equilibration, the instrument introduces a precisely metered volume of the headspace gas directly into the gas chromatograph (GC) or GC-MS via pressure-balanced injection—minimizing band broadening and ensuring sharp, symmetrical chromatographic peaks. Designed for unattended operation, the HS-7910A supports batch processing of up to 10 samples per sequence without manual intervention, making it suitable for high-throughput laboratories requiring GLP-aligned workflow integrity and audit-ready data traceability.

Key Features

• Fully automated 10-position sample carousel with automatic tray recognition and positional calibration at startup
• Self-diagnostic boot sequence with real-time fault detection, error logging, and on-screen alerting via 7-inch capacitive touchscreen interface
• Pressure-balanced injection mechanism eliminates pressure surges during transfer, improving retention time stability and peak shape fidelity
• Dual-stage purge: integrated needle wash and valve backflush functionality prevents carryover between samples—critical for trace-level VOC quantification
• Modular sample transfer path: standard 316 stainless steel tubing; optional deactivatable fused silica capillary line for analysis of reactive or adsorptive compounds (e.g., aldehydes, amines, sulfur species)
• Programmable injection volume control (typically 0.1–2.0 mL range, configurable via method parameters) enables dynamic linear range extension across concentration orders of magnitude
• External carrier gas regulation module allows seamless integration with any GC system—no hardware modification required; compatible with both split/splitless inlets and direct-coupled GC-MS interfaces
• Universal syringe needle geometry ensures mechanical and sealing compatibility with Agilent, Thermo Fisher, Shimadzu, PerkinElmer, and domestic GC platforms

Sample Compatibility & Compliance

The HS-7910A is validated for aqueous, solid, and semi-solid matrices including drinking water, soil, sediment, biological fluids (e.g., whole blood for ethanol determination), pharmaceutical excipients, medical device packaging, and polymer-based consumer goods. Its operational parameters align with over 20 national standard methods published by China’s Ministry of Ecology and Environment (MEE), National Health Commission (NHC), General Administration of Customs, and Standardization Administration of China (SAC), including but not limited to HJ 620–2011, HJ 642–2013, HJ 810–2016, GB/T 5750.8–2023, and GB/T 16886.7–2015. While primarily deployed in regulatory environments governed by Chinese standards, its method portability supports adaptation to ISO 15681-2, ASTM D6866-22 (for bio-based content screening), and US EPA Methods 502.2, 524.4, and 8260D when paired with appropriate GC-MS configurations and laboratory-developed validation protocols.

Software & Data Management

The embedded firmware supports method-driven operation through an intuitive touchscreen GUI, enabling storage of multiple temperature ramp profiles, equilibration times, pressurization durations, and injection parameters. All run logs—including timestamps, vial IDs, fault codes, and system status flags—are stored locally with export capability via USB. When interfaced with third-party chromatography data systems (CDS) such as OpenLab CDS, Chromeleon, or LabSolutions, the HS-7910A transmits discrete trigger signals and accepts external start commands, facilitating synchronized acquisition and metadata linkage. Although the device does not natively implement FDA 21 CFR Part 11-compliant electronic signatures or audit trails, its deterministic I/O behavior and consistent event logging enable integration into Part 11–compliant workflows when deployed within validated CDS environments meeting ALCOA+ data integrity principles.

Applications

• Environmental monitoring: Quantification of halogenated hydrocarbons, BTEX, ketones, ethers, and nitriles in water, soil, and waste matrices
• Clinical toxicology: Blood alcohol concentration (BAC) testing per GA/T 842–2019
• Pharmaceutical quality control: Residual solvent analysis (ICH Q3C) and ethylene oxide sterilant residue verification per GB/T 16886.7
• Food and packaging safety: VOC migration testing from plastics, adhesives, and laminates (SN/T 4148–2015)
• Forensic chemistry: Volatile accelerant identification in arson debris
• Materials science: Outgassing profiling of composites and battery electrolytes

FAQ

Is the HS-7910A compatible with GC-MS systems from non-Chinese manufacturers?
Yes—the universal needle design and pressure-regulated injection interface ensure mechanical and pneumatic compatibility with Thermo Scientific ISQ, Agilent 5977/8890, Shimadzu QP2020, and similar benchtop GC-MS platforms.

Does the instrument support dynamic headspace or purge-and-trap functionality?
No—the HS-7910A is strictly a static headspace sampler. It does not include trapping columns, cryofocusing, or continuous purging capabilities.

Can equilibration temperature and time be independently programmed per vial?
No—temperature and time settings apply uniformly across the entire 10-vial batch. Multi-method sequences require manual reconfiguration between runs.

What maintenance intervals are recommended for the valve and transfer line?
Valve actuation life exceeds 100,000 cycles; routine inspection every 500 injections is advised. Stainless steel transfer lines require cleaning every 2,000 injections; fused silica alternatives should be replaced after 500–800 injections depending on matrix complexity.

Is remote monitoring or network connectivity supported?
The unit lacks Ethernet/Wi-Fi modules and cannot be controlled remotely via LAN or cloud interface. Operation is confined to local touchscreen or TTL-triggered GC synchronization.