Brookfield EMP-Gold+ Portable Gold-Amalgam Mercury Analyzer
| Brand | Brookfield |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Direct Manufacturer |
| Regional Classification | Domestic (China) |
| Model | EMP-Gold+ |
| Pricing | Upon Request |
| Instrument Type | Portable |
| Measurement Principle | Cold Vapor Atomic Absorption Spectrometry (CVAAS) |
Overview
The Brookfield EMP-Gold+ Portable Gold-Amalgam Mercury Analyzer is a field-deployable, battery-powered analytical instrument engineered for trace-level mercury quantification in gaseous and liquid matrices. It operates on the well-established principle of Cold Vapor Atomic Absorption Spectrometry (CVAAS), where mercury vapor—generated via thermal desorption from a gold-coated trap—is transported into an absorption cell and quantified at the 253.7 nm resonance line. The gold amalgamation preconcentration step delivers exceptional selectivity and sensitivity, enabling sub-ng/m³ detection limits in air and sub-ng/L in aqueous samples after digestion. Designed explicitly for environmental monitoring, industrial hygiene, and upstream energy applications, the EMP-Gold+ meets the operational demands of remote fieldwork without compromising laboratory-grade data integrity.
Key Features
- Integrated gold-coated quartz trap for selective mercury preconcentration and thermal desorption, minimizing interferences from halogens, sulfur compounds, and hydrocarbons.
- Self-contained rechargeable lithium-ion battery system supporting ≥8 hours of continuous operation under typical field conditions.
- Compact, ruggedized chassis with IP54-rated enclosure, tested for shock, vibration, and temperature stability across –10 °C to +45 °C ambient ranges.
- Real-time GPS geotagging module synchronized with measurement timestamps, exporting WGS84 coordinates directly to CSV or KML for GIS integration.
- Onboard microprocessor with embedded calibration verification routines compliant with ASTM D5954 and ISO 20552 procedural requirements.
- Modular configuration support: Standard gas-phase mode (EMP-Gold) and optional aqueous mode (EMP-AQUA) with acid digestion interface and sample introduction pump.
Sample Compatibility & Compliance
The EMP-Gold+ accommodates diverse sample types across regulatory frameworks. In gas-phase analysis, it supports natural gas, LPG, shale gas, soil gas, and ambient air—validated per ASTM D5954 (mercury in natural gas) and ISO 20552 (ambient air mercury). For aqueous applications, the EMP-AQUA accessory enables compliance with USEPA Methods 245.1, 245.2, 245.5, 7470A, and 7471B; EN 1483; ASTM D3222-02; APHA 3112; and JIS K0102. All operational protocols align with occupational exposure guidelines from OSHA, ACGIH, NIOSH, and WHO, and environmental benchmarks established by USEPA and ATSDR. Data audit trails meet GLP documentation standards, including user authentication, method versioning, and raw signal logging.
Software & Data Management
The instrument runs Brookfield’s MercuryView™ firmware v3.2, featuring a touchscreen GUI with multilingual support (English, Spanish, French, Chinese). Raw absorbance signals, trap temperature profiles, desorption curves, and calibration drift corrections are stored locally with timestamped metadata. Export options include USB mass storage, Bluetooth 5.0, and optional Wi-Fi module for secure FTP/SFTP upload to centralized LIMS or cloud-based environmental dashboards. All data files conform to ASTM E2500-17 structural conventions and support 21 CFR Part 11-compliant electronic signatures when paired with enterprise authentication servers.
Applications
- Natural gas transmission integrity: Detection of mercury-induced liquid metal embrittlement (LME) risk in pipelines, heat exchangers, and cryogenic equipment—critical for upstream operators and midstream processors.
- Soil gas surveying: High-resolution spatial mapping of mercury anomalies to identify geothermal activity, historical contamination plumes, or landfill boundary migration.
- Ambient air screening: Rapid site characterization prior to permanent AQMS installation; correlation studies with stationary atomic fluorescence spectrometers (AFS) demonstrate <±5% bias at 1–50 ng/m³.
- Industrial hygiene monitoring: Personal and area sampling in chlor-alkali plants, coal-fired power facilities, and waste incineration sites per OSHA ID-132 and NIOSH Method 6009.
- Regulatory water testing: Analysis of surface water, groundwater, and digested sediment extracts in compliance with national and EU mercury directives.
FAQ
What detection limit does the EMP-Gold+ achieve in ambient air?
Typical method detection limit (MDL) is 0.2 ng/m³ for a 60-L air sample, based on EPA guidance for CVAAS-based field instruments.
Can the EMP-Gold+ be used for continuous unattended monitoring?
No—it is designed for discrete grab sampling and sequential batch analysis; continuous operation requires external air handling and power infrastructure not integrated into the portable platform.
Is method validation documentation available for regulatory submissions?
Yes—Brookfield provides a complete validation package including system suitability tests, spike recovery data, and interlaboratory comparison reports aligned with ISO/IEC 17025 requirements.
Does the EMP-AQUA module require separate certification for wastewater analysis?
No—the aqueous mode shares the same core optical and electronics architecture; only the sample introduction hardware and digestion protocol differ, both covered under the same ISO 9001-certified manufacturing process.
How often must the gold trap be replaced?
Under normal field use (≤100 analyses/week), the gold trap maintains performance for ≥1,500 cycles; replacement is indicated by >15% reduction in peak area reproducibility or failure of internal QC checks.
