Acrichi DK802A Fully Automated Static Headspace Sampler

Overview

The Acrichi DK802A 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 equilibrium—where a sealed sample vial is heated to a defined temperature, allowing volatile analytes to partition into the vapor phase above the sample matrix. After thermal equilibration, the vapor-phase headspace is transferred via a thermostatted six-port valve and heated transfer line directly into the GC inlet. This method eliminates liquid-phase injection complications, minimizes matrix interference, and enhances sensitivity for trace-level volatiles in complex matrices such as pharmaceuticals, environmental samples, food & beverage products, and forensic specimens.

Key Features

• Fully automated operation with one-touch startup and unattended batch processing for up to 20 vials—enabling overnight or high-throughput laboratory workflows.
• Independent temperature control zones: sample oven (ambient to 260°C), six-port valve (ambient to 220°C), and transfer line (ambient to 220°C), all maintained with ±0.1°C stability to ensure thermodynamic consistency and method robustness.
• Heated valve-and-loop assembly housed entirely within an insulated thermal enclosure—eliminating cold spots and preventing condensation or adsorption losses during vapor transfer.
• Configurable 1 mL sampling loop (customizable upon request) integrated with a low-dead-volume six-port valve to maximize analyte recovery and minimize carryover.
• Integrated pneumatic leak detection system with real-time fault alerts and automatic shutdown safeguards—ensuring operational integrity and compliance with laboratory safety protocols.
• Intuitive 7-inch capacitive touchscreen interface with preloaded method templates (10 editable, storable, and recallable methods), supporting rapid method development and instrument calibration verification.
• Hardware-level synchronization capability: triggers GC start and data acquisition software (e.g., Chromeleon, OpenLab, Empower) via TTL or contact closure signals—enabling seamless integration into regulated analytical environments.

Sample Compatibility & Compliance

The DK802A accommodates standard crimp-top or screw-cap headspace vials (10 mL and 20 mL formats), compatible with industry-standard septa and vial caps. Its thermal design supports aqueous, viscous, solid, and semi-solid samples—including polymer extracts, soil slurries, tablet dissolution media, and fermented beverages. The instrument meets foundational requirements for GLP and GMP-aligned laboratories: full audit trail support (when paired with compliant chromatography data systems), method parameter locking, user-access level management, and electronic record retention. While not intrinsically 21 CFR Part 11–certified, its architecture supports validation per ASTM D7217 (standard test method for determination of volatile organic compounds in water by static headspace GC), ISO 15681-2, and USP <467> residual solvents procedures.

Software & Data Management

The embedded firmware enables local method storage, run-time parameter adjustment, and real-time status monitoring (oven temp, valve temp, pressure status, cycle progress). All method parameters—including equilibration time, oven ramp rate, loop fill/purge duration, and valve timing—are timestamped and logged. Exportable CSV logs include sequence ID, vial position, setpoints, actual temperatures, and error codes. When interfaced with validated chromatography data systems (CDS), the DK802A supports full electronic signature capture, change control tracking, and raw data linkage—facilitating regulatory submissions under FDA, EMA, or PMDA guidelines.

Applications

• Pharmaceutical quality control: residual solvent testing per ICH Q3C guidelines using USP <467> compliant methods.
• Environmental analysis: quantification of BTEX, chlorinated hydrocarbons, and volatile halogenated compounds in groundwater and soil extracts.
• Food safety: detection of ethanol, acetaldehyde, and off-flavor volatiles in dairy, wine, and packaged foods.
• Forensic toxicology: headspace-GC analysis of blood alcohol content (BAC) and volatile drug metabolites.
• Materials science: outgassing profiling of adhesives, coatings, and polymer films under controlled thermal stress.

FAQ

Is the DK802A compatible with third-party gas chromatographs?
Yes—the instrument provides universal analog/digital I/O interfaces (TTL, RS-232, relay outputs) and supports vendor-agnostic triggering and synchronization with Agilent, Thermo Fisher, Shimadzu, PerkinElmer, and other GC platforms.
Can the loop volume be modified for specialized applications?
Standard configuration uses a 1 mL stainless-steel quantitative loop; custom loop volumes (e.g., 0.5 mL or 2 mL) are available upon order specification and factory calibration.
Does the system support multiple equilibration steps per vial?
Yes—method programming allows sequential headspace sampling from the same vial, enabling replicate injections or kinetic headspace profiling.
What maintenance routines are recommended for long-term reliability?
Monthly inspection of septa integrity, quarterly cleaning of the valve rotor seal and transfer line interior, and annual recalibration of temperature sensors against NIST-traceable standards are advised.
Is remote monitoring or network connectivity supported?
The DK802A does not feature built-in Ethernet or Wi-Fi; however, it can be integrated into LAN-based lab networks via external serial-to-Ethernet converters when used with compatible CDS platforms.