EXPEC SUPEC 5000 Cr(VI) Automated Hexavalent Chromium Analyzer
| Brand | EXPEC |
|---|---|
| Origin | Zhejiang, China |
| Manufacturer Type | Authorized Distributor |
| Origin Category | Domestic (China) |
| Model | SUPEC 5000 Cr(VI) |
| Pricing | Upon Request |
Overview
The EXPEC SUPEC 5000 Cr(VI) Automated Hexavalent Chromium Analyzer is a dedicated benchtop spectrophotometric system engineered for the quantitative determination of hexavalent chromium [Cr(VI)] in aqueous environmental and potable water matrices. It implements the standardized colorimetric principle based on the reaction between Cr(VI) and 1,5-diphenylcarbazide (DPC) under acidic conditions, generating a stable violet-colored complex with maximum absorbance at 540 nm. This method is fully aligned with internationally recognized regulatory protocols—including GB 7467–1987 (Water Quality – Determination of Hexavalent Chromium – DPC Spectrophotometric Method), GB/T 5750.6–2023 (Standard Methods for Examination of Drinking Water – Part 6: Metals and Metalloids), and the Operational Guidance Manual for the National Surface Water Environmental Quality Monitoring Network. Unlike conventional manual workflows requiring precise pipetting, timed incubation, and discrete cuvette handling, the SUPEC 5000 Cr(VI) integrates liquid handling, reaction control, photometric measurement, and data reporting into a single automated sequence—enabling unattended batch analysis of up to 48 samples per run.
Key Features
- Automated end-to-end workflow: From sample aspiration and reagent dispensing to mixing, incubation, absorbance measurement, and calibration verification—all executed without manual intervention.
- Dedicated parallel reagent delivery system: Independent fluidic paths for each reagent (e.g., sulfuric acid, DPC solution, phosphoric acid) eliminate cross-contamination risk and ensure stoichiometric consistency across runs.
- High-precision robotic arm: Equipped with optical position feedback and sub-millimeter repeatability, the arm accurately transfers samples and reagents to designated reaction vessels, minimizing positional drift and volume variability.
- Integrated interference mitigation module: Built-in pre-analytical conditioning unit removes spectral interferences from turbidity and natural organic color (e.g., humic substances) via dual-wavelength correction and optional filtration or oxidation pretreatment—ensuring compliance with matrix-specific method validation requirements.
- Rugged optical architecture: Dual-beam UV-Vis photometer with thermally stabilized tungsten-halogen source and silicon photodiode detector delivers long-term photometric stability (<0.002 AU/h drift) and linearity over 0–2.0 AU range.
Sample Compatibility & Compliance
The SUPEC 5000 Cr(VI) supports direct analysis of raw and filtered water samples—including surface water, groundwater, drinking water, wastewater effluents, and coastal seawater—with minimal pretreatment. Sample volumes range from 10–50 mL; detection capability meets or exceeds the regulatory limit of quantitation (LOQ) of 0.5 µg/L Cr(VI) as specified in GB 7467. The instrument’s operational protocol satisfies quality assurance criteria outlined in ISO/IEC 17025:2017 for testing laboratories, and its audit trail functionality—including user login logs, method version history, raw absorbance records, and calibration event timestamps—supports GLP-compliant documentation and FDA 21 CFR Part 11 readiness when deployed with validated software configuration.
Software & Data Management
Controlled via EXPEC Analytical Suite v3.x, the system provides intuitive method setup, real-time status monitoring, and automated report generation in PDF and CSV formats. All analytical parameters—including wavelength selection, pathlength, reaction time, blank subtraction mode, and calibration curve fitting algorithm (linear or quadratic)—are configurable and stored with digital signatures. Audit trails are immutable and exportable for regulatory review. Data integrity safeguards include role-based access control (RBAC), electronic signatures, and automatic backup to network-attached storage (NAS) or secure cloud repositories compliant with ISO 27001 information security standards.
Applications
- Regulatory environmental monitoring programs for national and provincial surface water quality assessment
- Drinking water safety surveillance in municipal utilities and third-party certification labs
- Industrial effluent compliance testing under discharge permit requirements
- Groundwater contamination investigations at legacy industrial sites
- Marine environmental studies evaluating Cr(VI) speciation dynamics in estuarine and nearshore systems
FAQ
Does the SUPEC 5000 Cr(VI) require daily recalibration?
No—calibration verification is performed automatically before each batch using certified reference materials (CRMs); full calibration is recommended weekly or after reagent lot changes.
Can the system analyze Cr(VI) in high-salinity seawater without matrix interference?
Yes—the integrated interference compensation module corrects for chloride-induced spectral shifts and turbidity; method validation data for salinities up to 35 g/kg NaCl is available upon request.
Is the instrument compatible with LIMS integration?
Yes—it supports ASTM E1482-compliant data export and HL7/ADT messaging for bidirectional communication with laboratory information management systems.
What maintenance intervals are recommended for fluidic components?
Reagent lines and sample probes require cleaning every 200 runs; pump tubing replacement is advised every 6 months or 1,000 cycles, whichever occurs first.
Does the system meet EPA Method 218.6 equivalency?
While optimized for Chinese national standards, method adaptation for EPA 218.6 (including use of certified DPC reagent and NIST-traceable Cr(VI) standards) is supported through optional application package licensing.
