HACH EZ6001 Total Dissolved Arsenic Online Analyzer
| Brand | HACH |
|---|---|
| Origin | Imported |
| Manufacturer Type | Manufacturer |
| Model | EZ6001 Analyzer |
| Price | Upon Request |
Overview
The HACH EZ6001 Total Dissolved Arsenic Online Analyzer is a laboratory-grade, fully automated instrumentation system engineered for continuous, real-time quantification of total dissolved arsenic (As(III) + As(V)) in drinking water treatment processes. It employs anodic stripping voltammetry (ASV) — a highly selective electrochemical technique — to detect arsenic at sub-ppb levels without requiring complex sample pretreatment or hazardous reagents. Unlike colorimetric or ICP-MS-based approaches, ASV delivers robust performance in low-conductivity, low-turbidity source waters typical of mountain spring intakes (e.g., Birena Springs, Andorra), where arsenic occurs predominantly as As(V) and background interferences are minimal. The analyzer is designed for integration into process control loops, supporting regulatory compliance with WHO guidelines (≤10 µg/L), EU Directive 2020/2184, and national drinking water standards requiring demonstrable monitoring continuity and data traceability.
Key Features
- Electrochemical detection via anodic stripping voltammetry (ASV) with gold-film working electrode for high selectivity toward dissolved arsenic species
- Measurement range: 0.1–100 µg/L As, with method detection limit (MDL) ≤0.05 µg/L — validated per EPA Method 3113B and ISO 17294-2
- Automated calibration and standard addition capability for drift correction and matrix compensation
- Three-point process monitoring configuration support: raw water intake, filtered effluent, and finished water discharge
- Modular design with IP65-rated enclosure; compatible with ambient temperature operation (5–40 °C) and typical municipal water pH (6.5–8.5)
- Integrated peristaltic sampling pump, reagent dosing module, and waste management system — all housed within a single compact unit
- Supports 4–20 mA analog outputs (x3) for direct PLC interfacing and SCADA integration
Sample Compatibility & Compliance
The EZ6001 is optimized for clear, low-turbidity (<1 NTU), low-organic-content source waters — such as alpine spring or groundwater — where arsenic exists primarily as inorganic As(V). It does not require pre-filtration or oxidation pretreatment when As(V) dominates, reducing maintenance burden and operational complexity. The analyzer complies with GLP principles for environmental monitoring and supports audit-ready data logging aligned with FDA 21 CFR Part 11 requirements when paired with HACH’s INTELLIGENT™ software suite. All measurement protocols adhere to ISO/IEC 17025–accredited laboratory practices, and validation documentation satisfies EU Water Framework Directive reporting obligations for priority hazardous substances.
Software & Data Management
Data acquisition and instrument control are managed through HACH’s INTELLIGENT™ Software Platform, which provides secure user authentication, electronic signature capability, and time-stamped audit trails for all calibration events, measurements, and maintenance logs. Raw voltammograms, peak current integrals, and quality control flags (e.g., electrode fouling alerts, insufficient deposition time warnings) are stored locally and exportable in CSV or XML formats. Remote diagnostics, firmware updates, and alarm notification via SNMP or Modbus TCP ensure seamless integration into centralized utility operations centers. All data records meet retention requirements for regulatory submissions under national drinking water regulations.
Applications
- Real-time optimization of iron oxide-based adsorptive arsenic removal systems — enabling dynamic adjustment of contact time, flow rate, and media regeneration cycles
- Early detection of adsorbent breakthrough to prevent non-compliant finished water release
- Verification of treatment efficacy during seasonal arsenic concentration fluctuations (e.g., spring snowmelt events)
- Supporting risk-based decision-making for bypass valve actuation and emergency response protocols
- Long-term trending of arsenic removal efficiency to inform media replacement schedules and capital planning
- Complementing offline lab analysis by reducing reliance on 72–96 hour turnaround times for certified testing
FAQ
Does the EZ6001 measure both As(III) and As(V) separately?
No — it reports total dissolved inorganic arsenic (As(III) + As(V)) as a summed concentration. Speciation requires offline HPLC-ICP-MS analysis.
Is sample filtration required prior to analysis?
Not for low-turbidity source waters (<1 NTU); however, a 0.45 µm inline filter is recommended if particulate arsenic or suspended solids exceed 5 mg/L.
Can the analyzer operate unattended for extended periods?
Yes — with scheduled automatic cleaning cycles and weekly standard verification, uptime exceeds 98% over 30-day intervals.
What maintenance is required?
Monthly electrode polishing, quarterly reagent replacement, and biannual pump tube inspection — all documented in the onboard maintenance log.
Is the EZ6001 compliant with US EPA or EU regulatory frameworks?
It meets performance criteria outlined in EPA Method 3113B and supports compliance with EU Directive 2020/2184 Annex I parameters for arsenic monitoring in drinking water supply systems.
