Acrichi DK803A Fully Automated Static Headspace Sampler
| Brand | Acrichi |
|---|---|
| Origin | Beijing, China |
| Model | DK803A |
| Instrument Type | Static Headspace Sampler |
| Automation Level | Fully Automated |
| Oven Temperature Range | Ambient to 260°C |
| Valve & Transfer Line Temperature Range | Ambient to 220°C |
| Temperature Control Accuracy | ±0.1°C |
| Sample Vial Capacity | 30 positions |
| Vial Sizes Supported | 10 mL and 20 mL |
| Quantitative Loop Volume | 1 mL (customizable) |
| RSD | <1.5% (for 200 ppm ethanol in water) |
| Power Supply | AC 220 V, 50 Hz |
| Dimensions (W×D×H) | 50 × 45 × 60 cm |
| Weight | ~40 kg |
Overview
The Acrichi DK803A Fully Automated Static Headspace Sampler is an engineered solution for precise, reproducible volatile compound analysis in conjunction with gas chromatography (GC). It operates on the principle of static headspace sampling—where a sealed sample vial is heated to equilibrium, allowing analytes to partition into the vapor phase above the liquid or solid matrix. The equilibrated headspace gas is then transferred via a thermostatted six-port valve and heated transfer line directly into the GC injector. Designed for laboratories requiring high-throughput, unattended operation, the DK803A integrates thermal precision, pneumatic integrity, and method flexibility to support routine QC, environmental testing, pharmaceutical residual solvent analysis (per ICH Q2(R2) and USP ), and forensic toxicology workflows.
Key Features
- Fully automated operation with one-touch start and 24/7 unattended batch processing for up to 30 vials
- Independent temperature control zones: sample oven (ambient–260°C), six-port valve (ambient–220°C), and transfer line (ambient–220°C), all maintained within ±0.1°C stability
- Heated valve manifold and transfer path eliminate cold spots, preventing condensation and ensuring quantitative transfer of high-boiling or thermally labile volatiles
- Integrated leak detection system with real-time pressure monitoring and audible/visual fault alerts
- Configurable sampling protocols: single-phase equilibrium, time-programmed progressive heating, multiple headspace extraction (MHE), and overlap heating for enhanced sensitivity
- 1 mL quantitative loop (standard; customizable upon request) coupled with low-dead-volume six-port valve architecture to minimize carryover and maximize injection precision
- Capacitive touchscreen interface with intuitive navigation, 10 preloaded method templates, and full parameter logging for audit-ready operation
Sample Compatibility & Compliance
The DK803A accommodates standard crimp-top 10 mL and 20 mL headspace vials, compatible with widely adopted septa types (e.g., PTFE/silicone) and autosampler racks used across major GC platforms. Its design adheres to fundamental requirements of ISO 17025-accredited laboratories, supporting GLP/GMP-compliant data integrity through timestamped method storage, user-access logs, and non-editable run records. While not certified under FDA 21 CFR Part 11 out-of-the-box, the system’s deterministic behavior, method traceability, and error-reporting capabilities align with validation prerequisites for regulated environments—including pharmaceutical residual solvent testing per USP , EP 2.4.24, and ICH guidelines.
Software & Data Management
Control is executed via embedded firmware with no external PC dependency—enabling standalone operation and reducing cybersecurity exposure. All methods (including temperature ramps, equilibration times, loop fill/purge cycles, and GC trigger events) are stored locally with version timestamps and operator ID tagging. The instrument supports both hardware-level synchronization (TTL pulse output for GC start) and software-level event triggering via RS-232 or optional Ethernet interface. Raw operational logs—including oven temperature profiles, valve actuation history, and leak-test results—are exportable as CSV for integration into LIMS or electronic lab notebooks (ELN). Method duplication, parameter cloning, and password-protected user roles (operator, supervisor, administrator) further enhance procedural rigor.
Applications
- Residual solvent quantification in active pharmaceutical ingredients (APIs) and excipients
- Volatile organic compound (VOC) profiling in drinking water, soil extracts, and air monitoring canisters
- Flavor and fragrance compound release kinetics in food packaging and beverage matrices
- Alcohol content determination in clinical blood or forensic samples
- Decomposition gas analysis in polymer stability studies and battery electrolyte screening
- Method development for multi-analyte headspace-GC/MS assays requiring high inter-vial reproducibility (RSD <1.5% demonstrated with ethanol/water standards)
FAQ
Does the DK803A support dynamic headspace (purge-and-trap) mode?
No—the DK803A is designed exclusively for static headspace sampling. Dynamic headspace functionality requires separate purge-and-trap instrumentation.
Can the quantitative loop volume be modified after purchase?
Yes—loop volumes other than 1 mL (e.g., 0.5 mL or 2 mL) are available as factory-configured options; field replacement requires recalibration and validation.
Is remote monitoring or network integration possible?
Standard configuration includes RS-232 for basic command control; optional Ethernet module enables TCP/IP communication for integration with centralized lab automation systems.
What maintenance intervals are recommended for long-term reliability?
Valve seals and septa should be replaced every 10,000 injections or quarterly—whichever occurs first; oven calibration verification is advised semiannually using NIST-traceable reference standards.
How does the overlap heating mode improve analytical efficiency?
It allows sequential vials to begin heating while the previous vial is still equilibrating, reducing total cycle time without compromising thermal equilibrium—ideal for large batches with uniform matrix composition.
