Anchor Wisdom MERAK-TINY Portable Monochromatic Wavelength Dispersive XRF Sulfur Analyzer
| Brand | Anchor Wisdom |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | MERAK-TINY |
| Pricing | Upon Request |
Overview
The Anchor Wisdom MERAK-TINY is a purpose-built, portable monochromatic wavelength dispersive X-ray fluorescence (MWD-XRF) spectrometer engineered for field-deployable, regulatory-grade sulfur quantification in liquid hydrocarbon fuels—specifically ultra-low-sulfur diesel (ULSD), gasoline, and marine distillates. Unlike conventional energy-dispersive XRF (ED-XRF) systems, the MERAK-TINY employs a highly collimated monochromatic excitation beam generated via double-crystal Bragg diffraction (Cu Kα at 8.04 keV), which selectively enhances the sulfur Kα emission (2.307 keV) while minimizing matrix interference and background scatter. This physical design enables direct, solvent-free, calibration-free measurement compliant with ASTM D7039–22 “Standard Test Method for Sulfur in Gasoline and Diesel Fuel by Monochromatic Wavelength Dispersive X-ray Fluorescence Spectrometry.” The instrument is deployed under national air quality initiatives—including China’s *Three-Year Action Plan for Winning the Blue Sky Battle* and the *Diesel Truck Pollution Control Campaign*—to support real-time enforcement of GB 17930–2016 (China VI gasoline) and GB 19147–2016 (China VI diesel), both mandating sulfur limits ≤10 mg/kg (10 ppm) with trace-level accuracy and metrological traceability.
Key Features
- Monochromatic excitation architecture: Dual Si(111) crystal monochromator delivers high spectral purity Cu Kα radiation, eliminating continuum bremsstrahlung and suppressing interferences from Cl, Ca, Zn, and Ni commonly present in fuel matrices.
- Field-optimized hardware: Integrated Li-ion battery (8.5 kg total mass), ruggedized IP54 enclosure, and passive thermal stabilization enable continuous operation for >6 hours without external power or consumables.
- Regulatory compliance by design: Fully aligned with ASTM D7039, ISO 8754:2003, and GB/T 11140–2010; supports audit-ready data logging per GLP/GMP principles.
- Zero-sample-prep workflow: Direct pour-and-measure analysis of 5–10 mL fuel samples in standard 10 mL polypropylene vials; no filtration, dilution, or inert gas purge required.
- Adaptive acquisition control: User-selectable counting time (60–300 s) with real-time dead-time correction and pulse pile-up rejection to maintain linearity across 1.0 ppm–1.0 wt% S range.
Sample Compatibility & Compliance
The MERAK-TINY is validated for homogeneous liquid fuels including EN 590 diesel, ASTM D975 diesel, ASTM D4814 gasoline, ISO 8217 marine gasoil, and aqueous urea solutions (DEF/AdBlue®). It rejects heterogeneous particulates and water-phase separation via built-in sample homogeneity verification—flagging viscosity-induced sedimentation or phase separation before analysis. All firmware and calibration protocols adhere to ISO/IEC 17025:2017 requirements for testing laboratories. Instrument qualification includes factory-certified LLD verification (0.5 ppm S at 180 s), repeatability assessment (RSD ≤2.94% at 5 ppm, n=11), and trueness validation against NIST SRM 2723c (diesel oil, certified S = 9.9 ± 0.4 ppm) and CRM-1001 (gasoline, 4.8 ± 0.3 ppm).
Software & Data Management
The embedded ARM-based operating system runs Anchor Wisdom’s proprietary AnalytiCAL™ firmware, featuring password-protected user roles (Operator, Supervisor, Administrator), electronic signature capture, and full 21 CFR Part 11-compliant audit trail (including method parameters, raw spectra, timestamped results, and operator ID). Data export supports CSV, PDF report generation (with embedded spectral plots), and seamless integration into LIMS via OPC UA or FTPS. Calibration models are stored as encrypted binary files with SHA-256 checksums; all modifications trigger automatic versioning and metadata stamping.
Applications
- On-site enforcement: Refinery gate checks, bulk terminal audits, roadside fuel inspection units, and port-of-entry screening for marine fuels.
- Process QC: Real-time monitoring of hydrotreater effluent sulfur breakthrough in refineries and blending facilities.
- Environmental compliance: Monitoring sulfur content in biodiesel blends (B5–B20), renewable diesel (HVO), and synthetic fuels per EU RED II and US EPA RFS2 mandates.
- Research & development: Catalyst deactivation studies, additive interaction screening, and low-sulfur formulation optimization under controlled laboratory or pilot-plant conditions.
FAQ
Does the MERAK-TINY require annual recalibration or certified reference materials for routine use?
No. The monochromatic excitation source and fixed-geometry detector configuration ensure long-term stability; only quarterly performance verification using a check standard (e.g., 10 ppm S in iso-octane) is recommended per ASTM D7039 Section 9.3.
Can it quantify sulfur in fuels containing ethanol or fatty acid methyl esters (FAME)?
Yes—validated for E10 gasoline and B7 diesel; FAME concentrations up to 7% v/v do not induce bias due to the selective monochromatic excitation and matrix-matched calibration approach.
Is the instrument suitable for use on moving platforms such as inspection vehicles or marine vessels?
Yes. Vibration-damped optical bench, solid-state detector, and internal gyroscope-based tilt compensation allow stable operation at accelerations <0.5 g and pitch/roll angles up to ±15°.
How is measurement uncertainty reported?
Expanded uncertainty (k=2) is calculated per GUM (JCGM 100:2008) incorporating type-A (repeatability) and type-B (calibration, drift, environmental) components; typical Urel = 3.2% at 10 ppm S (95% confidence).
