KEM AT-710S Potentiometric Titrator for Acid Number, Base Number, Bromine Value, Bromine Index, Mercaptan Sulfur, Basic Nitrogen, and Salt Content Analysis

Overview

The KEM AT-710S is a high-precision, fully automated potentiometric titrator engineered for quantitative determination of critical quality parameters in petroleum products, lubricants, organic heat transfer fluids, insulating oils, and industrial hydrocarbons. It operates on the fundamental principle of potentiometric endpoint detection—measuring the potential difference between a reference electrode and an indicator electrode during controlled reagent addition—to deliver trace-level accuracy in acid number (AN), base number (BN), bromine value (BV), bromine index (BI), mercaptan sulfur (MS), basic nitrogen (BNit), and salt content (NaCl equivalent). Designed to meet the rigorous demands of QC laboratories in refineries, petrochemical plants, and independent testing facilities, the AT-710S implements standardized electrochemical titration protocols aligned with ASTM, GB/T, SH/T, NB/SH/T, and ISO methodologies—including ASTM D664, D2896, D4739, D1159, D2710, D3227, D6470, and D4929—ensuring regulatory traceability and method equivalence across global operations.

Key Features

• 8.4-inch full-color TFT-LCD touchscreen interface with intuitive graphical navigation and multi-language support (English, Chinese, Japanese, Korean, Russian, Spanish, German, French)
• Smart titrant delivery system featuring embedded RFID chips in titrant cartridges for automatic reagent identification, concentration validation, and expiry tracking
• Intelligent electrode cables with non-volatile memory storing calibration history, serial number, maintenance logs, and compatibility metadata
• Low-dead-volume glass burette modules (1 mL, 5 mL, 10 mL, or 20 mL options) with certified volumetric accuracy per ISO 8655–3 and repeatability ≤ ±0.001 mL
• Wireless Bluetooth-enabled remote operation mode for enhanced operator safety during hazardous sample handling (e.g., crude oil, chlorinated solvents, strong acids/bases)
• Role-based user access control with configurable permissions (administrator, analyst, reviewer) supporting audit-ready GLP/GMP workflows
• Dual-channel potentiometric input enabling simultaneous monitoring of pH/mV and auxiliary signals (e.g., photometric absorbance, polarization current) for complex multi-parameter endpoints
• Onboard PDF report generation with embedded metadata (operator ID, timestamp, method version, instrument calibration status, raw titration curve)

Sample Compatibility & Compliance

The AT-710S accommodates diverse sample matrices including gasoline, diesel, jet fuel, crude oil, lube base stocks, transformer oils, synthetic esters, aromatic solvents, and industrial fatty acids. Its compliance architecture supports full alignment with international regulatory frameworks: ASTM methods for acid/base titration and halogen quantification; GB/T and SH/T standards for domestic Chinese refinery QC; NB/SH/T specifications for specialty lubricants and insulating fluids; and ISO/IEC 17025–compliant data integrity requirements. Built-in GLP functionality includes electronic signature-capable operator authentication, tamper-evident audit trails for all method edits and result exports, and integrated management of electrode performance history and titrant lot traceability—essential for FDA 21 CFR Part 11–aligned environments.

Software & Data Management

Equipped with KEM’s proprietary Tiamo™-compatible firmware, the AT-710S stores up to 120 pre-programmed standard methods and allows method chaining (up to 5 sequential titrations per run) for multi-analyte workflows such as concurrent acid number and chloride quantification. All measurement data—including raw mV/pH vs. volume curves, first/second derivative plots, equivalence point calculations, and statistical summaries (mean, SD, RSD)—are stored internally (500-sample capacity) and exportable via USB to external drives in CSV, XML, or encrypted PDF formats. The system supports optional integration with LIMS via RS-232 or Ethernet, and its expandable architecture permits connection to CHA-600/CHA-700 autosamplers and up to 10 additional titration units for unattended batch processing.

Applications

• Acid number determination in used lubricants per ASTM D664 and NB/SH/T 0946 to assess oxidative degradation
• Base number titration of engine oils using perchloric acid per ASTM D2896 and SH/T 0688 for additive depletion monitoring
• Bromine value and bromine index analysis of olefinic feedstocks per ASTM D1159 and GB/T 11135 to quantify unsaturation
• Mercaptan sulfur quantification in distillate fuels per ASTM D3227 and GB/T 1792 for corrosion and odor control
• Basic nitrogen measurement in crude fractions per NB/SH/T 0980 to predict catalyst poisoning in hydrotreating units
• Salt content assessment in crude oil per ASTM D6470 and GB/T 6532 to mitigate desalter fouling and overhead corrosion
• Organic chloride screening per ASTM D4929 and GB/T 18612 for FCC feedstock qualification

FAQ

Does the AT-710S support fully automated sample preparation?
No—the AT-710S is a dedicated titration platform and does not include integrated dissolution, dilution, or extraction modules. Sample homogenization and solvent conditioning must be performed externally per method requirements.
Can the instrument validate electrode performance in real time?
Yes—intelligent electrode cables log impedance, offset, and slope data at each calibration event, and the system alerts users when deviations exceed predefined thresholds per ISO 17025–recommended stability criteria.
Is method validation documentation available for regulatory submissions?
KEM provides IQ/OQ documentation packages, method verification reports aligned with ASTM E2500, and instrument-specific uncertainty budgets upon request—supporting validation under ISO/IEC 17025, USP , and ICH Q2(R2).
What safety certifications does the AT-710S hold?
It complies with IEC 61010–1 (Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use) and carries CE marking for EMC and low-voltage directives.
How is data integrity ensured during long-term deployment?
All data entries are time-stamped with NTP-synchronized clocks, protected by SHA-256 hashing, and retained with immutable audit trails covering method changes, result modifications, and user login/logout events—fully compliant with ALCOA+ principles.