Thermal Desorption Standard Tube Loading Platform KL-01 by APL
| Brand | APL |
|---|---|
| Origin | Sichuan, China |
| Manufacturer Type | Direct Manufacturer |
| Model | KL-01 |
| Heating Module Temperature Range | Ambient to 150 °C |
| Gas Flow Control Range | 0–300 mL/min (dynamically adjustable) |
| Flow Control Accuracy | ≤ 0.1 mL/min |
| Maximum Operating Pressure | ≥ 1.0 MPa |
| Concentration Range Supported | ppt to ppm |
| Temperature Control Accuracy | ≤ ±1 °C |
Overview
The APL KL-01 Thermal Desorption Standard Tube Loading Platform is an engineered benchtop system designed for precise, repeatable preparation of certified reference standards used in thermal desorption–gas chromatography–mass spectrometry (TD–GC–MS) workflows. It operates on a dual-path methodology: liquid-phase standard deposition onto sorbent tubes via heated dispensing modules, and dynamic gas-phase standard generation using mass flow-controlled dilution. This platform enables trace-level calibration across environmental, occupational health, and regulatory compliance applications—particularly for volatile organic compounds (VOCs), benzene homologues, and semi-volatile species in ambient air, stack emissions, and indoor air matrices. Its architecture integrates closed-loop temperature regulation, pressure-stable gas delivery, and programmable sequence execution to ensure metrological traceability aligned with ISO/IEC 17025 requirements for calibration laboratories.
Key Features
- Modular dual-mode operation: supports both liquid standard loading (via heated dispensing module) and dynamic gas standard generation (via precision mass flow controllers)
- Heated liquid dispensing module with PID-controlled temperature range from ambient to 150 °C, minimizing solvent volatility losses and ensuring consistent droplet formation
- Integrated high-accuracy mass flow controllers (MFCs) with full-scale range 0–300 mL/min and resolution ≤ 0.1 mL/min, enabling reproducible dilution ratios for gas-phase standards
- Pressure-rated fluidic path rated to ≥ 1.0 MPa, compatible with inert carrier gases (e.g., N₂, He, synthetic air) under elevated backpressure conditions typical of packed sorbent tube loading
- Programmable multi-step protocols: users define volume, flow rate, temperature, dwell time, and purge cycles per standard point—enabling automated multi-point calibration curve generation
- Robust stainless-steel and electropolished 316L wetted materials, compliant with USP Class VI and ASTM F814 for low extractables in trace analysis
Sample Compatibility & Compliance
The KL-01 platform accommodates industry-standard 6 mm OD × 90 mm or 110 mm thermal desorption tubes (e.g., Tenax TA, Carbopack B/C, graphitized carbon black composites) and supports both single-bed and multi-bed configurations. It is validated for use with aqueous and organic solvent-based liquid standards (e.g., methanol, acetone, CS₂ solutions) and certified gas mixtures (NIST-traceable). The system meets functional requirements outlined in EPA Method TO-17, ISO 16017-1, and EN 13649-2 for VOC sampling and calibration. All firmware logic implements audit-trail logging per FDA 21 CFR Part 11 guidelines when paired with compliant LIMS or instrument control software.
Software & Data Management
The KL-01 operates via embedded microcontroller firmware with USB-C interface and optional Ethernet connectivity. Configuration and method execution are managed through APL’s TD-LoadControl™ desktop application (Windows 10/11), which provides method templates, real-time flow/temperature monitoring, digital signature-enabled method locking, and CSV-based export of calibration metadata—including timestamps, setpoints, actual readings, and operator ID. Raw logs retain full traceability for GLP/GMP audits; no data is stored on-device beyond active session buffers.
Applications
- Preparation of multi-level calibration standards for EPA TO-14A, TO-15, and TO-17 compliant VOC analysis
- Generation of dynamic gas standards for method validation, system suitability testing, and instrument performance verification
- Trace-level spiking of blank sorbent tubes for recovery studies and breakthrough volume assessment
- Support of ISO 16000-6 indoor air quality monitoring programs requiring ppt–ppm quantitation
- Development and verification of thermal desorption parameters (e.g., desorption temperature ramp, cryo-focusing efficiency) using matrix-matched standards
FAQ
Does the KL-01 support automated sequential loading of multiple tubes?
Yes—when integrated with optional tube carousel accessories (sold separately), the platform executes unattended multi-tube loading sequences under user-defined method files.
Can the system be calibrated independently for flow and temperature?
Yes—built-in diagnostics allow field verification using NIST-traceable flow calibrators and PT100 reference thermometers; calibration certificates are provided with each unit.
Is the liquid dispensing module compatible with corrosive solvents such as carbon disulfide?
Yes—the dispensing needle, syringe body, and sealing components are chemically resistant to CS₂, acetone, methanol, and other common VOC solvents per ASTM D471 testing.
What safety features prevent over-pressurization during gas standard generation?
The system includes redundant pressure relief valves, real-time upstream/downstream pressure monitoring, and automatic MFC shutdown if differential pressure exceeds preset thresholds.
Is remote operation supported via network protocol?
Yes—Ethernet-enabled units support Modbus TCP and RESTful API endpoints for integration into centralized laboratory automation systems.
