Brookfield BTDS-52 Automated Total Dissolved Solids Analyzer

Overview

The Brookfield BTDS-52 Automated Total Dissolved Solids (TDS) Analyzer is a fully integrated gravimetric analysis system engineered for precision determination of dissolved solids, suspended solids, moisture content, and dry residue mass in environmental, food, clinical, and industrial samples. It operates on the principle of controlled evaporation followed by sequential isothermal drying and automated micro-gravimetric weighing under stabilized temperature and humidity conditions—eliminating ambient fluctuations that compromise traditional manual TDS protocols per ASTM D5907, ISO 11885, USP <241>, and EPA Method 160.2. The instrument features a hermetically sealed chamber with independent dual-zone climate control (±0.3 °C, ±1% RH), ensuring consistent thermal equilibrium across crucibles, evaporating dishes, and filtration membranes during repeated drying–cooling–weighing cycles. This architecture directly addresses the primary source of uncertainty in classical TDS analysis: hygroscopic reabsorption and thermal drift-induced buoyancy errors during post-drying handling.

Key Features

• Automated multi-cycle gravimetric workflow: sample loading → pre-drying → high-temperature drying (up to 180 °C) → desiccator-style cooling → analytical balance weighing → convergence-based endpoint detection (±0.02 mg repeatability)
• Dual-climate-controlled chamber: independently regulated drying zone and weighing zone, both maintained within ±0.3 °C and ±1% RH to prevent condensation and static charge interference
• Integrated Class I analytical balance (0.01 mg resolution) with automatic draft shield actuation and anti-vibration suspension
• Robust safety architecture: overtemperature cutoff (200 °C max), pressure-relief venting, real-time current monitoring, and emergency power-off circuitry compliant with IEC 61010-1
• Modular carrier system supporting standard platinum crucibles (30 mL), porcelain dishes (100 mL), GF/F filters, quartz fiber filters, and custom holders for EPA-compliant suspended solids (SS) analysis
• Unattended operation up to 72 hours with full audit trail logging—including timestamped weight records, chamber parameters, error flags, and operator ID—meeting FDA 21 CFR Part 11 requirements

Sample Compatibility & Compliance

The BTDS-52 accommodates aqueous matrices (drinking water, wastewater, groundwater), semi-solid food products (dairy powders, cereals, meat extracts), solid waste leachates, airborne particulate filters (PM₁₀/PM_2.5), and radioactive sedimentation plates used in alpha/beta activity quantification. All workflows align with method validation criteria outlined in ISO/IEC 17025:2017 for testing laboratories, including documented measurement uncertainty budgets, intermediate precision verification (n ≥ 6 replicates), and recovery studies using NIST-traceable KCl reference standards. The system supports GLP/GMP documentation packages and integrates seamlessly into LIMS environments via OPC UA or CSV export.

Software & Data Management

BTDS Control Suite v3.2 provides role-based access control (administrator, analyst, reviewer), configurable SOP-driven method templates, and automated report generation in PDF/A-1b format. Each analysis session generates a digitally signed, tamper-evident audit log containing raw weight sequences, environmental metadata, calibration history, and electronic signatures. Data encryption at rest (AES-256) and in transit (TLS 1.3) ensures compliance with GDPR and HIPAA data integrity mandates. Batch-level traceability enables retrospective root cause analysis for out-of-specification (OOS) results without manual record reconstruction.

Applications

• Environmental monitoring: TDS, TS, SS, and ash content in EPA-regulated water and wastewater streams
• Food safety labs: moisture content verification per AOAC 950.46 and Codex Alimentarius CAC/GL 68-2008
• Hazardous waste characterization: moisture/dry matter ratio in TCLP-extracted solid residues (40 CFR Part 261)
• Public health laboratories: atmospheric dust deposition rate quantification (ISO 9096) and filter mass stabilization prior to XRF or gamma spectrometry
• Academic research: gravimetric calibration of aerosol mass monitors and validation of low-cost PM sensors

FAQ

Does the BTDS-52 comply with EPA Method 160.2 for TDS determination?

Yes—the system implements all critical procedural controls: defined drying temperature (103–105 °C), mandatory desiccator cooling, gravimetric endpoint convergence (≤0.5 mg difference between consecutive weighings), and documented environmental stability throughout analysis.
Can it handle radioactive samples requiring lead shielding?

The instrument chassis supports retrofitting of removable lead-lined inserts (up to 10 mm Pb equivalent) for low-activity alpha/beta filters; full gamma compatibility requires external hot-cell integration.
Is method validation support provided?

Brookfield delivers IQ/OQ/PQ protocols, uncertainty calculation templates aligned with EURACHEM/CITAC Guide, and on-site installation qualification services performed by ISO/IEC 17025-accredited engineers.