PFA Volumetric Flask 50 mL – Binzhenghong Precision Laboratory Flask

Overview

The Binzhenghong PFA Volumetric Flask 50 mL is a high-purity, chemically inert volumetric flask engineered for trace-level analytical workflows where glass compatibility is insufficient or hazardous. Constructed from premium-grade perfluoroalkoxy alkane (PFA), this flask operates across an exceptional thermal range of −200 °C to +260 °C and maintains dimensional stability under aggressive chemical exposure—including hydrofluoric acid (HF), molten alkali metals, and high-concentration oxidizers—where borosilicate glass would rapidly degrade or fail. As a Class A, TC (to contain) volumetric device, it conforms to ISO 1042 and ASTM E288 standards for volumetric accuracy, with nominal tolerance ±0.08 mL at 20 °C (50 mL size). Its design prioritizes metrological integrity: the optically transparent body enables real-time visual inspection of solution homogeneity; the ultra-smooth, non-wetting interior minimizes surface adsorption and residual film formation; and the precision-machined threaded closure ensures reproducible sealing without gasket compression drift. Unlike polypropylene or HDPE alternatives, PFA exhibits negligible extractables—even after repeated thermal cycling—making it suitable for certified reference material (CRM) storage, ultra-trace metal analysis (e.g., ICP-MS), and preparation of calibration standards per ISO/IEC 17025 requirements.

Key Features

• Ultra-broad thermal stability: validated continuous use from cryogenic (liquid nitrogen immersion) to high-temperature digestion (260 °C oven or hotplate)
• Threaded PFA cap with integrated fluoropolymer-faced septum ensures leak-tight containment during vortexing, sonication, or centrifugation
• Laser-etched volume graduation lines with permanent contrast enhancement for unambiguous meniscus reading under standard lab lighting
• Surface roughness (Ra) < 0.05 µm—measured via atomic force microscopy—ensures near-zero liquid hold-up and eliminates carryover between preparations
• Batch-certified raw material traceability: each production lot undergoes FTIR spectroscopy and ion chromatography screening for residual catalysts and monomer residues
• Mechanically robust construction: impact resistance exceeds ASTM D256 Izod values for standard laboratory plastics, reducing breakage-related safety incidents

Sample Compatibility & Compliance

This flask is routinely deployed in applications demanding extreme chemical purity and long-term stability: environmental PFAS analysis (EPA Method 537.1), geological rare-earth element fractionation (ASTM D5673), CDC-regulated clinical toxicology sample storage, and semiconductor-grade reagent handling (SEMI F57). It complies with USP for plastic packaging components, meets extractables testing thresholds defined in ICH Q5C, and supports GLP/GMP documentation through optional calibration services aligned with ISO/IEC 17025 Clause 6.5. While not classified as a primary standard, its performance qualifies it for secondary standardization in accredited laboratories—provided users perform in-house verification per ISO/IEC 17025 Section 7.7 prior to critical use.

Software & Data Management

No embedded electronics or software are present—consistent with ISO/IEC 17025’s requirement for passive, non-programmable measurement devices. Calibration data (when ordered) is delivered as a PDF certificate containing: serial number, nominal volume, measured volume at 20 °C, uncertainty budget (k = 2), environmental conditions during calibration, and NIST-traceable reference standard identifiers. All certificates include digital signature and QR-coded verification link for audit trail integrity.

Applications

• Preparation of multi-element calibration standards for ICP-OES and HR-ICP-MS
• Storage and dilution of high-purity HF-based etchants in microelectronics wafer processing
• Long-term stabilization of organometallic reference materials in earth science repositories
• Low-background radiochemical separations (e.g., U/Pb geochronology) requiring sub-pg/mL blank levels
• Regulatory-compliant dilution of EPA SW-846 Method 6020B extracts
• QC/QA sample spiking in environmental wastewater monitoring programs

FAQ

Is this flask calibrated upon delivery?
Standard units ship uncalibrated. Optional NIST-traceable calibration is available at additional cost and requires explicit purchase order specification.
Can it be autoclaved?
Yes—validated for repeated steam sterilization at 121 °C, 15 psi for 20 minutes. Avoid rapid pressure release to prevent cap seal deformation.
What cleaning protocol is recommended?
Rinse with ≥99.9% methanol or ultrapure water, followed by air-drying in laminar flow hood. Do not exceed 60 °C in drying ovens to preserve dimensional fidelity.
Does it meet FDA 21 CFR Part 11 requirements?
As a passive volumetric device, it does not generate electronic records and therefore falls outside the scope of Part 11. However, associated calibration certificates support ALCOA+ data integrity principles when archived digitally.
Why must users perform secondary calibration?
Plastic volumetricware exhibits hygroscopic and thermal expansion behavior distinct from glass. ISO 1042 mandates user verification under actual operating temperature and humidity conditions prior to quantitative use.