Acrichi DK808A Fully Automated Dynamic Headspace Sampler

Overview

The Acrichi DK808A Fully Automated Dynamic Headspace Sampler is an engineered solution for precise, reproducible volatile organic compound (VOC) analysis in complex matrices. Designed for seamless integration with gas chromatography (GC) systems, it operates on the principle of dynamic headspace extraction—where inert carrier gas continuously purges the vapor phase above a heated sample, transferring analytes onto a trap or directly into the GC inlet. Unlike static headspace methods, dynamic sampling enhances sensitivity for trace-level volatiles and enables quantitative recovery across wide concentration ranges. The DK808A supports method-driven workflows compliant with ASTM D6866, ISO 11843-2, and USP , making it suitable for residual solvent testing, environmental monitoring, food flavor profiling, and pharmaceutical quality control laboratories requiring GLP/GMP-aligned instrumentation.

Key Features

• Fully automated operation with one-touch sequence launch, enabling unattended overnight analysis of up to 112 vials
• Independent temperature control for three critical zones: sample oven (ambient–260 °C), six-port valve (ambient–220 °C), and transfer line (ambient–220 °C), all maintained within ±0.1 °C accuracy
• Integrated 1 mL quantitative loop with low-dead-volume six-port valve configuration, minimizing carryover and maximizing injection precision
• Intelligent thermal management architecture: heated valve-to-line junctions eliminate cold spots, reducing peak broadening and improving chromatographic resolution
• Real-time vial presence detection and automatic leak verification prior to pressurization—errors logged with timestamped alerts and sequence interruption prevention
• Multi-mode thermal programming support: overlapping heating (to reduce cycle time), time-gradient equilibration (for heterogeneous samples), and multiple headspace extraction (MHE) for enhanced accuracy in low-concentration quantitation
• Self-diagnostic firmware with power-on system check, positional encoder validation for carousel alignment, and fault-code reporting via on-device touchscreen interface

Sample Compatibility & Compliance

The DK808A accommodates standard 10 mL and 20 mL crimp-top or screw-cap headspace vials, compatible with widely adopted sealing technologies (e.g., PTFE/silicone septa). Its robust mechanical design ensures consistent crimping force and pressure integrity during repeated pressurization cycles. The instrument meets electromagnetic compatibility (EMC) requirements per IEC 61326-1 and safety standards per IEC 61010-1. Software functionality supports audit-trail generation, user access levels, and electronic signature capability—facilitating compliance with FDA 21 CFR Part 11 when paired with validated GC data systems. All thermal and timing parameters are traceable to NIST-traceable references through factory calibration documentation.

Software & Data Management

Control is executed via an embedded industrial-grade 10.1-inch capacitive touchscreen running a real-time Linux OS. The interface provides simultaneous display of method parameters, active status indicators (oven temp, valve temp, pressure, elapsed time), and system diagnostics. Ten preconfigured method templates are stored onboard, each editable for equilibration time, purge flow rate, trap desorption profile (if applicable), and injection timing. Optional PC-based software extends functionality: remote instrument control, live status streaming, event-triggered logging, and export of operational logs (including vial ID, timestamp, temperature deviation, and error flags) in CSV/Excel format for QA review and regulatory submission.

Applications

• Residual solvent analysis in APIs and excipients per ICH Q3C guidelines
• Volatile impurity screening in polymer packaging materials (ISO 11843-2)
• Flavor compound profiling in beverages and dairy products
• Environmental VOC monitoring in soil/water extracts (EPA Method 502.2, 524.4)
• Automotive interior air quality testing (VDA 278)
• Forensic toxicology screening for ethanol and volatile metabolites

FAQ

Does the DK808A support direct coupling to third-party GC systems?
Yes—it features TTL and relay-based external trigger inputs and outputs, enabling synchronized start/stop with Agilent, Thermo Fisher, Shimadzu, and PerkinElmer GC platforms.
Is EPC/EFC integration available as standard or optional?
Electronic pressure and flow control (EPC/EFC) is an optional module, providing dual-channel pneumatic regulation for purge gas and transfer line carrier flow.
What maintenance intervals are recommended for long-term reliability?
Routine checks include septum replacement every 100 injections, quantitative loop cleaning quarterly, and annual calibration verification using certified reference standards.
Can the instrument perform multi-step thermal desorption protocols?
No—the DK808A is dedicated to headspace sampling only; it does not incorporate cryo-focusing or thermal desorption tube handling capabilities.
Is vibration-assisted equilibration supported out-of-the-box?
Oscillation mode (0–300 rpm) is available as a factory-installed option, enhancing mass transfer kinetics for viscous or semi-solid samples.