Alalis PI5100-Na Sodium Ion Concentration Meter
| Brand | Alalis |
|---|---|
| Origin | Shanghai, China |
| Model | PI5100-Na |
| Instrument Type | Benchtop Sodium Ion Analyzer |
| Measurement Range | 0.00–14.00 pX |
| Detection Limit | 0.01 ppm |
| Response Time | ≤1 s |
| Accuracy | ±0.01 pX (for monovalent ions) |
| Temperature Range | −10 to 110 °C |
| Resolution | 0.01 pX / 0.01 mol/L / 0.01 mg/L / 0.01 ppm |
| pH Range | −2.000 to 19.999 pH |
| mV Range | −1999.9 to +1999.9 mV |
| Temperature Compensation | Automatic/manual (0–60.0 °C for ion mode |
| Data Storage | 1000 sets (manual & auto) |
| Interface | USB |
| Display | 90 × 68 mm LCD with white backlight and real-time clock |
| IP Rating | IP54 |
| Compliance | GLP-compliant data management, supports ASTM D1129, ISO 10523, and USP <791> for ion-selective electrode methodology |
Overview
The Alalis PI5100-Na Sodium Ion Concentration Meter is a high-precision benchtop analytical instrument engineered for reliable, trace-level sodium ion quantification in aqueous matrices using potentiometric ion-selective electrode (ISE) methodology. Based on the Nernst equation, the system measures the potential difference between a sodium-selective membrane electrode and a stable reference electrode, converting voltage output into concentration values expressed in standardized units (pX, mol/L, mg/L, or ppm). Designed for routine and regulatory water quality laboratories, it delivers sub-ppm detection capability (0.01 ppm LOD), rapid response (<1 s), and metrological traceability aligned with international electrochemical standards. Its dual-mode architecture supports both dedicated sodium analysis and full-spectrum pH/mV/Redox measurements—making it suitable for boiler feedwater monitoring, desalination process control, pharmaceutical water systems (PW/WFI), and environmental surface/groundwater compliance testing.
Key Features
- Potentiometric ISE platform optimized for Na+ with integrated temperature compensation (0–60.0 °C) and automatic calibration (2–5 point)
- Multi-parameter capability: simultaneous pH (−2.000–19.999), mV (±1999.9), redox (EH), and temperature (−10–110 °C) measurement
- GLP-compliant data handling: 1000-entry internal memory with timestamp, electrode ID logging, and calibration history
- Flexible unit selection: seamless switching between pX, mol/L, mg/L, and ppm for sodium reporting
- Large 90 × 68 mm backlit LCD with real-time clock and intuitive icon-driven interface
- Robust mechanical design: IP54-rated enclosure with sealed electrode ports and rubber protective caps
- USB connectivity with dedicated PC software for data export, report generation, and audit trail review
- Specialized operational modes: high-purity water pH correction, ammonia-containing pure water pH adjustment, and NIST/China/Custom buffer recognition
Sample Compatibility & Compliance
The PI5100-Na is validated for use with low- to medium-conductivity aqueous samples including drinking water, cooling tower water, steam condensate, ultrapure water (UPW), wastewater effluents, and brackish groundwater. It accommodates standard 12-mm diameter ion-selective electrodes (e.g., R2423 reference, S2211T combination pH electrode) and includes dedicated sodium electrode conditioning solution and 0.1 mol/L Na+ calibration standard. The instrument conforms to ASTM D1129 (Standard Terminology Relating to Water), ISO 10523 (Water Quality — Determination of pH), and USP (pH Measurements) for ISE-based determinations. All calibration and measurement records support 21 CFR Part 11-compliant electronic signatures when used with validated software workflows.
Software & Data Management
Data acquisition and archival are managed via USB-linked PC software supporting CSV and Excel-compatible export formats. Each stored record contains sample ID, measurement date/time, electrode serial numbers, calibration parameters, temperature, and raw mV values—enabling full traceability required under GLP and GMP environments. Audit trails log operator actions, calibration events, and configuration changes. Software permits batch report generation aligned with ISO/IEC 17025 documentation requirements and allows user-defined templates for regulatory submissions (e.g., EPA Method 300.0, ISO 14911).
Applications
- Power plant chemistry: real-time sodium monitoring in turbine condensate and boiler feedwater to prevent corrosion and scaling
- Pharmaceutical manufacturing: verification of sodium residuals in purified water (PW) and water-for-injection (WFI) per USP
- Environmental laboratories: compliance testing for sodium in surface water, groundwater, and wastewater per EPA Region 9 guidelines
- Food & beverage QC: sodium content verification in process water and final product rinse solutions
- Research settings: kinetic studies of ion exchange resins and membrane selectivity screening
FAQ
What electrode configurations are supported for sodium measurement?
The PI5100-Na requires a sodium-selective electrode paired with a double-junction reference electrode (e.g., R2423) to minimize liquid junction potential errors in low-ionic-strength samples.
Does the instrument support automatic temperature compensation during sodium analysis?
Yes—automatic temperature compensation is enabled across 0–60.0 °C; manual override is available for non-standard thermal conditions.
How is data integrity ensured for regulatory audits?
All measurements include time/date stamps, electrode identifiers, calibration coefficients, and raw mV readings—fully exportable for audit-ready documentation.
Can the meter be used for other ions besides sodium?
While optimized for Na+, the platform supports up to ten pre-programmed ions (e.g., K+, Cl−, F−, NO3−) and allows custom ion slope entry for non-standard ISEs.
Is firmware update capability available?
Firmware upgrades are delivered via USB-connected PC software and maintain backward compatibility with existing calibration and data files.
