Zhonghuipu JH-2 Adsorption Tube Aging Instrument
| Brand | Zhonghuipu |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Direct Manufacturer |
| Product Origin | Domestic (China) |
| Model | JH-2 |
| Temperature Control Range | Ambient to 400 °C |
| Gas Flow Rate | 10–1000 mL/min |
| Tube Capacity | 20 positions |
| Temperature Accuracy | ±1 °C |
| Aging Timer | Up to 99 h 59 min 59 s |
| Power Consumption | 500 W |
| Electrical Supply | 220 V, 50 Hz |
| Compatible Tube Dimensions | OD 6–6.5 mm, minimum length 89 mm (stainless steel, quartz, or borosilicate glass) |
Overview
The Zhonghuipu JH-2 Adsorption Tube Aging Instrument is a dedicated thermal conditioning system engineered for the controlled regeneration and preconditioning of sorbent-packed sampling tubes used in thermal desorption–gas chromatography (TD–GC) workflows. It operates on the principle of programmed heating under inert gas purge—typically high-purity nitrogen—to remove residual contaminants, moisture, and volatile organic compounds adsorbed onto sorbent media (e.g., Tenax-TA, Carbopack, Carboxen, or custom multi-bed configurations). This process ensures baseline stability, minimizes carryover, and restores tube performance to meet stringent analytical requirements for environmental air monitoring, occupational hygiene testing, and indoor air quality (IAQ) analysis per ISO 16017-1, EPA TO-17, and ASTM D6196 protocols.
Key Features
- 20 independent heating positions with uniform thermal distribution across all tube holders, enabling parallel aging of up to 20 sorbent tubes without cross-contamination or thermal gradient-induced variability.
- Precise temperature control from ambient to 400 °C with ±1 °C accuracy, verified by integrated PT100 sensors and PID-regulated heating elements—critical for reproducible desorption efficiency and sorbent integrity.
- Adjustable inert gas flow (10–1000 mL/min) via calibrated mass flow control; each position supports individual flow optimization based on tube geometry and sorbent type.
- Full-cycle automation: programmable aging duration (up to 99 h 59 min 59 s), post-aging forced cooling, and optional automatic gas shutoff—reducing operator intervention and enhancing lab safety.
- Chemically inert fluidic path: PTFE-lined gas lines and PTFE-sealed fittings eliminate outgassing, leaching, or memory effects during high-temperature purging.
- Robust mechanical architecture with stainless-steel housing, front-panel digital interface, real-time temperature display, and dual-stage overtemperature protection (hardware + software limit).
Sample Compatibility & Compliance
The JH-2 accommodates standard 6–6.5 mm OD sorbent tubes of ≥89 mm length—including stainless steel, quartz, and borosilicate glass formats—commonly used with Tenax-TA, coconut-shell activated carbon, graphitized carbon black, and proprietary multi-sorbent beds (e.g., Carbopack B/C, Carbograph 1/4). Its design conforms to methodological prerequisites outlined in EPA Method TO-17 (Rev. 5), ISO 16017-1:2000, and EN 13688 for tube preconditioning prior to active or passive air sampling. All operational parameters—including temperature ramp profiles, dwell times, and purge flow rates—are fully documentable for GLP/GMP-aligned laboratories requiring audit-ready records.
Software & Data Management
While the JH-2 operates via intuitive front-panel controls (no external PC required), its timing, temperature setpoints, and flow settings are manually logged for traceability. For labs implementing electronic recordkeeping, instrument usage logs—including start/stop timestamps, target temperature, actual achieved temperature (±1 °C), and total purge volume—can be integrated into LIMS or ELN systems via manual entry or barcode-scanned batch identifiers. The unit supports 21 CFR Part 11–compliant procedural documentation when paired with laboratory SOPs defining aging validation protocols (e.g., blank tube breakthrough testing, replicate recovery studies).
Applications
- Pre-conditioning of sorbent tubes prior to field deployment in ambient air, workplace, or building IAQ monitoring programs.
- Regeneration of spent tubes between analytical runs to extend service life and reduce consumable costs.
- Method development support for TD–GC–MS quantification of VOCs, SVOCs, and semi-polar compounds (e.g., aldehydes, PAHs, pesticides).
- Validation of tube cleanliness per ISO 16017-2 criteria (e.g., <50 pg benzene blank response after aging).
- Supporting accredited environmental testing labs seeking ISO/IEC 17025 compliance through documented, repeatable tube preparation procedures.
FAQ
What tube materials and dimensions are supported?
Stainless steel, quartz, and borosilicate glass tubes with outer diameters of 6–6.5 mm and minimum lengths of 89 mm.
Is nitrogen the only recommended purge gas?
Yes—high-purity (≥99.999%) nitrogen is strongly recommended; argon may be used where oxygen sensitivity is critical, but helium is not advised due to excessive permeation and cost inefficiency.
Can the JH-2 be integrated with automated thermal desorbers?
It is a standalone aging unit; however, its standardized tube dimensions and conditioning consistency make it fully compatible with autosamplers from Markes, Gerstel, PerkinElmer, and Thermo Fisher thermal desorption platforms.
Does the instrument include calibration certification?
Factory calibration of temperature sensors and flow meters is performed prior to shipment; users should conduct periodic verification using NIST-traceable reference thermometers and bubble flow meters per internal QA protocols.
What safety protections are built in?
Dual independent overtemperature cutoffs (electronic and mechanical), automatic gas shutoff (optional configuration), and PTFE-sealed, low-outgassing construction ensure safe operation at 400 °C under continuous purge conditions.
