PTFE Sampling Bucket – Binzhenghong Model BZ-2.5L Submersible Water Sampler

Overview

The Binzhenghong BZ-2.5L PTFE Sampling Bucket is a high-purity, submersible water sampler engineered for reliable, contamination-free collection of aqueous environmental samples from surface, mid-depth, and near-bottom zones in lakes, rivers, reservoirs, and groundwater monitoring wells. Constructed entirely from virgin polytetrafluoroethylene (PTFE), this bucket operates on a gravity-triggered, double-valve closure mechanism—ensuring sample integrity by minimizing turbulence, air entrapment, and cross-contamination during retrieval. Its seamless, one-piece molded body eliminates internal seams or crevices where particulates or biofilm could accumulate, making it suitable for ultra-trace metal analysis (e.g., Pb, Cd, As), nutrient speciation (NO₃⁻, PO₄³⁻), and volatile organic compound (VOC) preservation per EPA Method 500.0 protocols.

Key Features

• Chemically inert sampling chamber: Virgin PTFE construction provides exceptional resistance to hydrofluoric acid, aqua regia, sodium hypochlorite, and chlorinated solvents—critical for regulatory-compliant sampling in industrial effluent or contaminated site investigations.
• Impact-resistant structural design: Reinforced wall geometry and optimized wall thickness (≥3.2 mm) withstand repeated deployment/retrieval and accidental drops up to 1.5 meters onto concrete surfaces without deformation or seal compromise.
• Gravity-actuated dual-valve system: Stainless steel springs and PTFE-coated plungers ensure consistent, repeatable valve actuation at depths ≥0.5 m; no external trigger cables or mechanical linkages required.
• Low extractables & leachables profile: Pre-cleaned and triple-rinsed with ultra-pure water (18.2 MΩ·cm) and acetone under Class 100 cleanroom conditions; certificate of conformance includes ICP-MS trace metal blank data (≤5 ng/L for Al, Fe, Cu, Zn).
• Universal compatibility: Standardized 1.5-inch NPT threaded top port accepts standard stainless steel or Kevlar-reinforced sampling ropes, winch hooks, and depth gauges; optional integrated depth stop collar available.

Sample Compatibility & Compliance

This sampler is validated for use with liquid matrices including freshwater, seawater, wastewater, leachate, and process water. It meets the physical and material requirements of ASTM D3370 (“Standard Practices for Sampling Water”), ISO 5667-10 (“Water quality — Sampling — Part 10: Guidance on sampling of water and steam in boiler systems”), and US EPA Method 500.0 (“Determination of Volatile Organic Compounds in Drinking Water by Gas Chromatography”). Its PTFE composition satisfies USP Class VI biocompatibility criteria and complies with FDA 21 CFR §177.1550 for fluoropolymer food-contact applications—supporting GLP/GMP-aligned environmental laboratories requiring audit-ready documentation.

Software & Data Management

While the BZ-2.5L is a passive mechanical sampler, Binzhenghong provides digital support tools for full chain-of-custody integration. A downloadable Excel-based Field Log Template (v2.1) includes fields for GPS coordinates, depth markers, ambient temperature, operator ID, and sample preservation method—exportable to LIMS platforms via CSV. Optional QR-coded serial labels (laser-etched on PTFE) enable barcode-scanned entry into electronic lab notebooks (ELN) compliant with 21 CFR Part 11 when paired with validated signature workflows.

Applications

• Regulatory monitoring under Clean Water Act (CWA) Section 402 NPDES permits
• Groundwater quality assessment at Superfund sites (EPA Region-specific QA/QC plans)
• Pre- and post-treatment validation in municipal drinking water facilities
• Research-grade sampling for dissolved oxygen, pH, conductivity, and redox potential profiling
• Marine sediment pore-water extraction when coupled with a low-shear piston corer

FAQ

Is this sampler suitable for VOC analysis?
Yes—the virgin PTFE body exhibits negligible VOC adsorption or outgassing; it is routinely used in EPA Method 502.2 and 524.4 workflows when pre-rinsed with methanol and field-blank verified.
Can it be sterilized for microbiological sampling?
Autoclaving is not recommended due to PTFE’s thermal creep behavior above 250 °C; however, gamma irradiation (25 kGy) or ethylene oxide (EtO) sterilization is validated and documented in the CoA.
What is the maximum operational depth?
Rated for continuous immersion to 100 m static head pressure; burst pressure tested to 1.5 MPa (≈150 m water column).
Does Binzhenghong offer calibration or verification services?
Yes—third-party volumetric verification (per ISO/IEC 17025 accredited lab) and material certification packages are available upon request.
Are custom volume sizes available?
Yes—standard offerings include 0.5 L, 1.0 L, 1.5 L, 2.5 L, and 5.0 L configurations; non-standard volumes (e.g., 3.75 L) can be produced under NDA with minimum order quantity of 50 units.