Ontech Ontech810 Multifunctional Automated Sample Introducer for Atmospheric Pre-concentration

Overview

The Ontech Ontech810 Multifunctional Automated Sample Introducer is an engineered solution for high-integrity, low-background introduction of volatile organic compounds (VOCs) from pressurized sampling media into cryogenic pre-concentration systems—primarily the Ontech870 Atmospheric Pre-concentrator. It operates on a pressure-driven, valve-gated sample transfer principle, utilizing precisely timed pneumatic actuation and temperature-controlled flow paths to ensure quantitative delivery while minimizing adsorptive loss, memory effects, or breakthrough during high-concentration injections. The system is purpose-built for regulatory trace-level analysis in ambient air monitoring, industrial hygiene, and environmental compliance laboratories where reproducibility, method adherence, and contamination control are non-negotiable. Its vertical modular architecture enables compact deployment in constrained laboratory footprints without compromising accessibility or serviceability.

Key Features

• 16-position sample carousel with field-configurable layout—supports interchangeable mounting for SUMMA® canisters (6 L, 1 L, 0.5 L), Tedlar® gas sampling bags (1–10 L), and custom adapters for alternative media.
• Full-path inertization using Silonite®-coated electropolished 316 stainless steel—applied to all valves, fittings, tubing, and internal manifolds—to eliminate catalytic decomposition and surface adsorption of reactive VOCs including aldehydes, sulfur compounds, and halogenated species.
• Heated flow path maintained at a stable ≥110 °C across the entire sample introduction train—including valves, transfer lines, and junction blocks—to prevent condensation, cold spots, and analyte wall deposition.
• Automated pre-injection leak verification: software-initiated pressure hold test prior to canister valve actuation, with configurable pass/fail thresholds per sample position.
• Post-analysis reverse purge protocol: each individual flow path undergoes sequential backflush with ultra-high-purity nitrogen (or helium), controlled by the onboard sequencer and synchronized with instrument start triggers.
• Native integration with Ontech870 pre-concentrator via standardized pneumatic and electrical I/O—enabling fully coordinated timing between sample introduction, trap focusing, and GC injection.

Sample Compatibility & Compliance

The Ontech810 supports unmodified use with industry-standard sampling vessels compliant with U.S. EPA Method TO-14A and TO-15A specifications, as well as China’s HJ 759–2023 standard for ambient air VOC measurement. Its universal port geometry accommodates both threaded and bayonet-style SUMMA® canister interfaces, and its bag holder assembly applies consistent, calibrated clamping force to minimize seal leakage during pressurized transfer. All wetted materials meet ASTM F2229 requirements for inertness in gas-phase analytical applications. The system’s operational logic and audit trail generation align with GLP and GMP data integrity expectations, supporting 21 CFR Part 11-compliant software environments when paired with validated LIMS or CDS platforms.

Software & Data Management

Control is executed via Ontech’s proprietary IntroduceSuite v3.x software—deployed on Windows-based host PCs—providing method-driven sequence definition, real-time status monitoring, event logging, and full audit trail capture. Each run records timestamps for valve actuation, leak test outcomes, pressure profiles, heating zone temperatures, and purge cycle completion. Export formats include CSV and XML for integration with enterprise data systems. The software architecture supports remote diagnostics, firmware updates over Ethernet, and role-based user access controls—essential for multi-user regulated environments.

Applications

• Ambient air quality monitoring networks requiring daily unattended VOC profiling across multiple sites.
• Indoor air quality assessments in commercial buildings, schools, and healthcare facilities under ISO 16000-6 and EPA Compendium Method IP-1B protocols.
• Industrial emission source testing where rapid turnaround and high sample throughput are critical (e.g., fenceline monitoring per EPA Method 325).
• Method validation studies evaluating recovery, precision, and carryover for target analytes across concentration ranges from sub-ppt to ppm levels.
• Research applications involving reactive or thermally labile VOCs—such as formaldehyde, acrolein, or hydrogen sulfide—where surface passivation and thermal stability are paramount.

FAQ

Does the Ontech810 require external cooling or refrigeration?

No—it operates at ambient-to-elevated temperatures only; cryogenic functions are handled exclusively by the coupled pre-concentrator (e.g., Ontech870).
Can it be used with non-Ontech pre-concentrators?

Yes, provided the external system offers compatible pneumatic trigger inputs, pressure sensing feedback, and standardized ¼” Swagelok® or VCR® gas interfaces.
Is calibration traceable to NIST standards?

While the Ontech810 itself is not a measuring instrument, its flow timing, temperature setpoints, and pressure thresholds are factory-verified against NIST-traceable references; full system calibration requires co-validation with the pre-concentrator and GC-MS platform.
What maintenance intervals are recommended?

Valve actuation life is rated at ≥500,000 cycles; Silonite® coating integrity should be verified annually via blank analysis and recovery testing; heater zones require quarterly thermocouple verification.
Is the software validated for 21 CFR Part 11 compliance?

IntroduceSuite v3.x includes electronic signatures, audit trail export, and user permission tiers—but formal validation must be performed by the end-user laboratory per their SOPs and regulatory scope.