FangZhou PXJ-1C+ Lead Ion Analyzer

Overview

The FangZhou PXJ-1C+ Lead Ion Analyzer is a high-precision benchtop ion concentration meter engineered for rigorous environmental water quality monitoring and regulatory compliance testing. Based on potentiometric measurement principles using selective ion electrodes (e.g., lead-selective electrode), the instrument quantifies free Pb²⁺ activity in aqueous samples via Nernst equation-based calibration. Its architecture integrates pH, mV, ORP, temperature, and multi-ion analysis into a single platform—making it suitable for municipal wastewater treatment plants, environmental protection agencies, drinking water utilities, and third-party testing laboratories operating under ISO/IEC 17025 or EPA Method 6010D frameworks. The device complies with GLP (Good Laboratory Practice) data integrity requirements, supporting traceable, auditable measurement records essential for regulatory submissions.

Key Features

• Benchtop design with backlit LCD display and intuitive menu-driven navigation for operation in low-light field labs or controlled environments
• GLP-compliant data management: stores up to 4096 measurement records with timestamp (date + time), electrode ID, calibration history, and operator notes
• Multi-parameter capability: simultaneous measurement of ion concentration (pX), pH (−10.000 to 20.000), mV/RelmV/ORP (−2000.00 to 2000.00 mV), and temperature (−20.0 to 135.0 °C)
• High-resolution detection: 0.001 pH resolution, 0.01 mV resolution, and configurable ion resolution (1–3 significant digits)
• Advanced calibration architecture: supports 2–9 point ion calibration with automatic standard curve generation; includes built-in libraries for F⁻, Cl⁻, Br⁻, NH₄⁺, NO₃⁻, Na⁺, and 16 other ions plus two user-defined parameters
• Flexible unit conversion: 13 concentration units selectable per measurement—including ppm, ppb, mol/L, mmol/L, µmol/L, ng/L, mg/L, g/L, %, and µg/L—with real-time interconversion
• Temperature compensation: ATC (Automatic Temperature Compensation) or manual mode across full operational range; sensor input impedance ≥3 × 10¹² Ω ensures signal stability with high-resistance ion-selective electrodes

Sample Compatibility & Compliance

The PXJ-1C+ is validated for use with standard lead-selective electrodes (e.g., PVC membrane or coated-wire types) and compatible with common sample matrices including surface water, groundwater, treated effluent, and potable water. It meets functional requirements aligned with ASTM D3557 (Lead in Water by Atomic Absorption), EPA 9035 (Ion-Selective Electrode Methods), and ISO 10523 (Water Quality — Determination of pH). While not a certified reference method instrument, its performance characteristics support screening-level compliance verification and trend monitoring where rapid, on-site ion quantification is required. All stored data adhere to GLP metadata standards—including calibration dates, electrode serial numbers, and environmental conditions—to facilitate internal audit readiness and laboratory accreditation maintenance.

Software & Data Management

Equipped with FangZhou’s proprietary “pH-link” PC software (Windows-compatible), the analyzer enables bidirectional USB/RS232 communication for secure data export, statistical analysis, report generation, and graphical visualization. Raw datasets include measurement values, timestamps, temperature readings, electrode status flags, and calibration coefficients. The software supports FDA 21 CFR Part 11–compatible audit trails when configured with user authentication and electronic signature modules—critical for GMP-regulated environmental QA/QC workflows. Export formats include CSV, Excel (.xlsx), and PDF for integration into LIMS platforms or regulatory documentation systems.

Applications

• Regulatory monitoring of Pb²⁺ in drinking water distribution systems per WHO guidelines (10 µg/L) and US EPA action level (15 µg/L)
• Wastewater discharge compliance verification against local environmental permits
• Leachate analysis from landfill monitoring wells and contaminated soil extraction studies
• Calibration and validation support for ICP-MS or AAS laboratories performing confirmatory analysis
• Educational use in university environmental chemistry and analytical instrumentation laboratories
• Field-deployable lab backup for mobile environmental response teams requiring rapid ion screening

FAQ

What ion-selective electrodes are compatible with the PXJ-1C+?
The instrument accepts standard BNC-input ion-selective electrodes and includes a dedicated electrode converter for legacy or non-BNC interfaces. Lead-selective electrodes must conform to ISE performance specifications (e.g., Nernstian slope >28 mV/decade at 25°C).

Does the PXJ-1C+ support automatic electrode diagnostics?
Yes—it performs real-time impedance checks and slope validation during calibration, flagging deviations exceeding ±5% from theoretical Nernst response.

Can calibration data be exported for external review?
All calibration logs—including standard concentrations, measured potentials, R² values, and date/time stamps—are exportable via pH-link software in machine-readable formats.

Is firmware upgrade supported?
Firmware updates are distributed annually via FangZhou’s technical support portal and applied through USB-connected PC installation.

What is the warranty coverage for the main unit?
The PXJ-1C+ host carries a 36-month limited warranty; defective units are replaced within 6 months of purchase under standard terms.