HX-WSAA1835 Petroleum Products Water-Soluble Acid and Alkali Analyzer
| Brand | Spectra Invent |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Authorized Distributor |
| Country of Manufacture | China |
| Model | HX-WSAA1835 |
| Power Consumption | 1200 W |
| pH Measurement Range | 0.00–14.00 |
| pH Accuracy | ±0.02 pH |
| pH Resolution | 0.01 pH |
| Repeatability | ≤1% |
| Stability | ±1% F.S. / 4 h |
| Response Time (T90) | <1 min at 25 °C |
| Temperature Control Range | Ambient to 100 °C |
Overview
The Spectra Invent HX-WSAA1835 Petroleum Products Water-Soluble Acid and Alkali Analyzer is a dedicated benchtop instrument engineered for the quantitative and qualitative assessment of water-soluble acidic and alkaline contaminants in refined petroleum products—including transformer oils, turbine oils, insulating oils, and lubricants. It operates on the standardized solvent extraction principle defined in GB/T 259 and DL/T 429.3: a precisely metered volume of distilled water or ethanol–water mixture is used to extract ionizable acidic or basic species from the oil sample under controlled thermal and mechanical agitation. The resulting aqueous extract is then subjected to high-fidelity potentiometric pH measurement using a calibrated, temperature-compensated glass electrode system. This methodology provides a direct, traceable, and reproducible indication of corrosive potential—critical for assessing oil degradation, additive depletion, or contamination ingress in high-voltage electrical insulation systems.
Key Features
- Integrated tri-functional platform combining magnetic stirring, mechanical agitation, and programmable heating—enabling simultaneous extraction and temperature stabilization without manual intervention.
- Dedicated high-resolution pH meter with 24-bit A/D conversion, ensuring stable signal acquisition and minimizing quantization error across the full 0.00–14.00 pH range.
- Thermostatic control system with PID regulation and ±0.5 °C accuracy over 20–100 °C, compliant with thermal requirements specified in GB/T 259 Annex A.
- Intuitive Chinese-language graphical user interface with hierarchical menu navigation, real-time parameter display, and on-screen calibration prompts.
- Rugged stainless-steel reaction chamber and corrosion-resistant fluid pathways designed for repeated exposure to polar solvents and low-pH extracts.
- Compliance-ready design supporting audit trails for calibration records, operator ID input, and timestamped measurement logs—facilitating alignment with internal GLP procedures.
Sample Compatibility & Compliance
The HX-WSAA1835 is validated for use with mineral-based and synthetic insulating oils, hydraulic fluids, and industrial lubricants meeting ASTM D6971, IEC 60296, and GB 2536 specifications. Sample volumes range from 10 mL to 50 mL; extraction solvents include deionized water (for strong acids/bases) and 95% aqueous ethanol (for weakly ionizable species). Instrument performance adheres to the precision criteria outlined in GB/T 259: repeatability of pH readings must not exceed ±0.05 pH units between duplicate extractions under identical conditions. While not certified to ISO/IEC 17025 as a standalone testing laboratory, the analyzer supports method validation per ISO/IEC 17025 Clause 7.2 when operated within an accredited facility’s documented SOPs.
Software & Data Management
Data handling is implemented via embedded firmware with non-volatile memory storage for up to 500 test records, each including date/time stamp, operator ID, sample ID, extraction temperature, measured pH, and pass/fail status relative to specification thresholds (e.g., pH < 4.5 indicating presence of water-soluble acid). USB host interface enables export of CSV-formatted reports for integration into LIMS environments. Calibration history—including buffer values, slope, and offset—is retained and viewable without administrative privileges. The system supports two-point pH calibration (4.01 and 7.00 or 7.00 and 10.01 buffers) with automatic temperature compensation (ATC) activated via integrated Pt100 sensor. No cloud connectivity or remote access capabilities are included, preserving data sovereignty and aligning with industrial cybersecurity policies.
Applications
- Pre-commissioning verification of transformer oil purity prior to energization.
- Condition monitoring of turbine oils in power generation facilities to detect hydrolytic degradation.
- Quality control release testing of new lubricants per OEM technical data sheets.
- Root-cause analysis of copper corrosion in sealed oil-filled equipment.
- Research applications evaluating antioxidant stability under accelerated oxidation protocols (e.g., ASTM D2440).
- Third-party inspection services performing conformity assessments for customs clearance and import certification.
FAQ
What standards does the HX-WSAA1835 directly support?
It is designed and verified for compliance with GB/T 259 (Petroleum Products — Determination of Water-Soluble Acids and Bases) and DL/T 429.3 (Method for Determination of Water-Soluble Acids in Electrical Insulating Oils).
Can the instrument be used with non-aqueous solvents other than ethanol–water?
No—only distilled water and 95% (v/v) aqueous ethanol are validated per GB/T 259; alternative solvents may compromise electrode integrity and invalidate results.
Is the pH electrode included with the system?
Yes—a refillable, double-junction pH electrode with integrated ATC sensor is supplied as standard equipment, pre-calibrated and ready for immediate use.
Does the analyzer meet FDA 21 CFR Part 11 requirements?
No—it lacks electronic signature capability, audit trail encryption, and role-based access control required for regulated pharmaceutical or biotech environments.
What maintenance intervals are recommended for routine operation?
Electrode cleaning and recalibration every 10 tests or daily (whichever occurs first); stir bar inspection before each use; chamber descaling with dilute citric acid solution every 50 extractions.
