Shimadzu EDX-720 Energy Dispersive X-Ray Fluorescence Spectrometer (Refurbished)

Overview

The Shimadzu EDX-720 is a benchtop or floor-standing energy dispersive X-ray fluorescence (EDXRF) spectrometer engineered for precise, non-destructive elemental analysis of solid, powdered, and liquid samples. Based on the fundamental principle of X-ray fluorescence—where primary X-rays excite inner-shell electrons in sample atoms, resulting in characteristic secondary (fluorescent) X-ray emission—the EDX-720 utilizes a high-stability X-ray tube and a silicon drift detector (SDD) to acquire full-spectrum data simultaneously across the analytical range from sodium (Na, Z=11) to uranium (U, Z=92). Its optimized optical path, vacuum-compatible sample chamber (optional), and integrated collimation system ensure high peak-to-background ratios and robust spectral fidelity. Designed for routine QA/QC and research-grade applications in geoscience laboratories, the instrument delivers trace-level sensitivity (detection limit ≤1 ppm for many mid-Z elements under optimal conditions), quantitative accuracy validated against certified reference materials (CRMs), and long-term measurement stability suitable for GLP-compliant workflows.

Key Features

• High-resolution silicon drift detector (SDD) with energy resolution <140 eV at Mn Kα (5.89 keV), enabling clear separation of adjacent elemental peaks (e.g., S Kα/Pb Mα, Ti Kβ/V Kα)
• Programmable X-ray tube (Rh anode, 50 kV/1 mA max) with automatic kV/mA optimization per element or matrix
• Dual-mode sample handling: accommodates flat solids (up to Ø30 mm), pressed pellets, loose powders, and sealed liquid cells
• Integrated vacuum or helium purge option for enhanced light-element sensitivity (Na–Mg–Al–Si–P–S–Cl)
• Automated multi-point mapping capability (optional software module) for spatial heterogeneity assessment in rock thin sections or ore fragments
• Robust mechanical design with vibration-damped base and thermally stabilized detector housing for <0.1% RSD repeatability over 8-hour continuous operation

Sample Compatibility & Compliance

The EDX-720 supports direct analysis of geological specimens—including igneous and metamorphic rocks, sediments, mineral concentrates, soil cores, and synthetic standards—without requiring acid digestion or fusion. Sample preparation is limited to homogenization, drying, and pelletizing (with cellulose or boric acid binder) where needed. The system complies with ASTM D7359-21 (standard test method for elemental analysis of petroleum products by EDXRF), ISO 22088-2 (plastics—determination of bromine and antimony), and aligns with IAEA guidance for geochemical survey protocols. All firmware and calibration routines are traceable to NIST SRMs (e.g., SRM 278, Basalt Rock; SRM 688, Multi-Element Ore). Data acquisition and reporting meet audit-trail requirements for ISO/IEC 17025 accreditation when operated within documented SOPs.

Software & Data Management

The instrument is controlled via Shimadzu’s proprietary PC-based QualiQuant™ software, supporting both qualitative screening (peak identification with library matching) and quantitative analysis using fundamental parameter (FP) and empirical calibration methods. Software features include batch processing of up to 99 samples, matrix correction algorithms for silicate-rich and sulfide-dominated matrices, and automated drift correction using internal reference channels. All raw spectra, processing parameters, and result logs are stored in encrypted .qdb files compliant with FDA 21 CFR Part 11 requirements when configured with user authentication, electronic signatures, and audit trail logging. Export formats include CSV, PDF reports (with embedded spectra), and XML for LIMS integration.

Applications

• Geochemical mapping of major oxides (SiO₂, Al₂O₃, Fe₂O₃, CaO, MgO, Na₂O, K₂O) and trace metals (Ni, Cr, V, Zn, Cu, Pb, As, REEs) in exploration core samples
• Rapid grade control in mining operations—real-time quantification of ore品位 (e.g., Cu in chalcopyrite, Au in pyrite-hosted systems)
• Mineralogical phase correlation via elemental ratio analysis (e.g., Mg# = 100×Mg/(Mg+Fe), Cr# = 100×Cr/(Cr+Al))
• Contaminant screening in environmental soil and sediment (Pb, Cd, Hg, As, Se) per EPA Method 6200
• Reference material certification support and inter-laboratory comparison studies

FAQ

Is the EDX-720 supplied with factory recalibration and performance verification documentation?
Yes—each refurbished unit undergoes full functional testing, detector resolution verification (<140 eV), tube output stability validation, and CRM-based accuracy checks. A Certificate of Performance Verification (including measured detection limits and repeatability data) is provided.
Can the system analyze light elements such as sodium and magnesium in geological matrices?
Yes—with optional vacuum or helium purge mode enabled, the EDX-720 achieves reliable quantification down to Na (Z=11) in low-absorption matrices; detection limits improve significantly under inert atmosphere versus air.
What level of technical support and warranty is included with the refurbished instrument?
All units include a 12-month parts-and-labor warranty, remote diagnostics support, and access to Shimadzu-certified application specialists for method development assistance.
Does the EDX-720 comply with regulatory data integrity requirements for regulated labs?
When deployed with QualiQuant™ in audit-trail mode and integrated into a validated IT environment, the system meets ALCOA+ principles and supports 21 CFR Part 11 compliance for electronic records and signatures.
Are consumables and spare parts readily available for long-term operation?
X-ray tubes, SDD detector assemblies, Be windows, and sample cups are stocked globally through Shimadzu’s authorized distribution network; lead time for critical spares is typically ≤10 business days.