Parr High-Pressure Digestion Vessel Liner for Parr Autoclave Systems

Overview

The Binzhenghong ZH-100mL High-Pressure Digestion Vessel Liner is an engineered replacement liner system designed for seamless integration with standard Parr Instrument Company high-pressure autoclaves—specifically models 4740, 4742, and 4744 internal vessel assemblies. This liner operates on the principle of sealed-vessel acid digestion under elevated temperature and pressure, enabling complete mineralization of refractory matrices including silicates, alloys, biological tissues, and environmental solids. Its geometry and material selection are optimized to maintain thermal stability up to 260 °C and pressure resistance up to 1500 psi (10.3 MPa) when used within the structural and operational limits of the host Parr outer vessel. Unlike generic liners, the ZH series features a precision-machined interlocking groove-and-ridge interface with the Parr outer canister, ensuring axial alignment, uniform stress distribution, and repeatable sealing performance across hundreds of digestion cycles.

Key Features

• Interchangeable PTFE liner compatible with Parr 4740/4742/4744 internal vessel configurations without modification to outer hardware
• Optimized cup-and-cap geometry: tapered conical lid with recessed apex facilitates quantitative post-digestion sample recovery and minimizes analyte adsorption on internal surfaces
• Dual-stage pressure management: integrated micro-vent channel in the lid cap allows controlled vapor release at predetermined thresholds, preventing catastrophic overpressure while preserving vessel integrity
• Low-background elemental composition: PTFE formulation meets ASTM D4897 specifications for trace-metal-grade fluoropolymer; certified ≤0.1 ng/g Na, K, Fe, and Ni per cm² surface area
• Serialized pairing: each liner set (inner cup + lid) carries a laser-engraved matching ID number aligned with its designated outer canister, enabling audit-ready usage tracking per GLP requirements
• Thermal resilience: standard PTFE variant rated for continuous service up to 260 °C; optional microwave-grade PTFE upgrade offers enhanced creep resistance and reduced permeability to HF and hot HNO₃ vapors

Sample Compatibility & Compliance

The ZH-100mL liner supports digestion protocols compliant with EPA Method 3052, ISO 11466, and USP heavy metal testing guidelines. It accommodates solid samples up to 1.5 g (depending on matrix density) and liquid volumes up to 8 mL, maintaining stoichiometric acid-to-sample ratios required for complete oxidation. The liner’s low leachable profile ensures compatibility with ICP-MS, ICP-OES, and GF-AAS detection systems where sub-ppt quantification is mandated. All units undergo batch-certified extractable testing per ASTM E1978 and are supplied with CoA documentation referencing trace element blank values measured via quadrupole ICP-MS following EPA 200.8 digestion blanks.

Software & Data Management

While the liner itself is a passive component, its serialized identification enables integration into laboratory information management systems (LIMS) and electronic lab notebooks (ELN). When paired with Parr’s 4748 or 4848 controller firmware (v3.2+), users may log liner ID, cycle count, and cumulative thermal exposure in instrument audit trails. The physical design supports 21 CFR Part 11–compliant workflows: no embedded electronics or firmware exist, eliminating validation complexity, yet full traceability is preserved through mechanical serialization and documented reuse history.

Applications

• Geochemical analysis of silicate rocks and soils using HF-HNO₃-HClO₄ mixtures
• Pharmaceutical excipient screening per ICH Q5D elemental impurity control strategies
• Food safety testing for As, Cd, Pb, and Hg in fortified cereals and infant formula
• Metallurgical QC of Ni-based superalloys and rare-earth permanent magnets
• Environmental monitoring of PCB-contaminated sediments and fly ash particulates
• Academic research requiring reproducible high-temperature oxidative dissolution without cross-contamination

FAQ

Is this liner certified for use with Parr’s FDA-registered digestion systems?
Yes—when installed in accordance with Parr Technical Bulletin TB-4740-Rev.D and operated within specified temperature/pressure envelopes, the ZH-100mL liner maintains full mechanical and chemical compatibility with FDA-registered Parr digestion platforms.
What is the maximum recommended reuse count per liner set?
Under routine EPA 3052 conditions (200 °C, 12 h, HNO₃/HF), the standard PTFE liner achieves ≥120 cycles with verified dimensional stability and blank integrity; microwave-grade PTFE extends this to ≥180 cycles.
Can the liner be sterilized in an autoclave prior to biological sample digestion?
Yes—dry heat sterilization at 160 °C for 2 h or ethylene oxide treatment is validated; steam autoclaving is not recommended due to PTFE’s limited moisture absorption tolerance.
Does Binzhenghong provide lot-specific certificate of analysis (CoA) for each shipment?
Yes—each batch is accompanied by a CoA reporting ICP-MS-measured blanks for 22 elements, tensile strength (ASTM D638), and thermal deformation onset (ASTM D648) at 0.45 MPa load.