English Product Name

Overview

The JiTian WX-AFS-930 is a hydride generation atomic fluorescence spectrometer (HG-AFS) engineered for trace-level quantification of hydride-forming elements—including arsenic (As), selenium (Se), bismuth (Bi), mercury (Hg), antimony (Sb), tellurium (Te), tin (Sn), germanium (Ge), lead (Pb), zinc (Zn), cadmium (Cd), and gold (Au)—in complex matrices. Its operational principle relies on the generation of volatile metal hydrides or cold vapor (for Hg), followed by atomization in an argon-hydrogen flame and detection of element-specific atomic fluorescence emission. Designed for high reproducibility and low detection limits (sub-pg/mL for As/Hg), the AFS-930 integrates precision fluidics, pulsed hollow cathode lamp excitation, and optimized quartz atomization geometry to ensure robust performance in regulated laboratory environments. This service offering covers comprehensive maintenance, fault diagnostics, component-level repair, and full-system refurbishment of both new and pre-owned WX-AFS-930 units—ensuring continued compliance with analytical requirements across food safety, environmental monitoring, clinical toxicology, and regulatory testing workflows.

Key Features

• Automated sequential injection sample introduction system with ±0.5% volumetric precision per dispense cycle
• Polar-coordinate autosampler supporting 80- or 160-position racks for unattended operation
• Integrated reagent management: on-line standard dilution, automatic addition of KBH₄, HCl, masking agents, and internal standards
• High-stability pulsed power supply for hollow cathode lamps—extending lamp life >3,000 h while improving signal-to-noise ratio
• Low-temperature Ar-H₂ flame ignition and shielded quartz atomizer for enhanced atomization efficiency and reduced interferences
• Integrated hazardous exhaust scrubbing system for As, Hg, and Sb vapors compliant with OSHA PEL and local emissions guidelines
• Self-diagnostic firmware with real-time pressure monitoring, gas flow validation, optical path alignment verification, and lamp intensity tracking
• Modular upgrade paths: speciation analysis (As/Se/Hg/Sb), gaseous Hg monitoring (air), ultra-trace aqueous Hg detection (seawater, surface water), biological matrix modules (blood/urine Pb/Cd), and direct solid/liquid Cd/Hg analysis without digestion

Sample Compatibility & Compliance

The WX-AFS-930 supports direct analysis of aqueous extracts, acid digests, and derivatized biological fluids following standardized preparation protocols (e.g., EPA Method 1631E for Hg, GB 5009.11–2023 for As). Its validated workflows align with international regulatory frameworks including ISO/IEC 17025:2017 (general competence requirements), FDA 21 CFR Part 11 (electronic records integrity), and GLP-compliant audit trails when paired with certified software configurations. Routine maintenance ensures adherence to method detection limit (MDL) stability per ASTM D3919 (As in water) and ISO 17294-2 (multi-element water analysis), with documented calibration verification against NIST-traceable CRM standards (e.g., NIST SRM 1640a, 1643e).

Software & Data Management

The instrument operates under JiTian’s dual-language (English/Chinese) AFS Control Suite v4.2+, featuring automated system diagnostics, multi-curve calibration (up to 10 working curves), batch reporting in PDF/CSV/XLSX formats, and embedded expert guidance for method optimization. Audit-ready data handling includes user-access logging, electronic signatures, version-controlled method storage, and configurable data retention policies. Software updates and firmware patches are provided post-repair to maintain compatibility with current operating systems and cybersecurity standards. All calibration and maintenance records are archived with timestamps, technician ID, and pass/fail verification logs—supporting internal QA reviews and external accreditation audits.

Applications

This maintenance service sustains reliable operation in high-throughput laboratories performing: routine surveillance of inorganic contaminants in drinking water and wastewater (WHO, EU Directive 2020/2184); heavy metal screening in agricultural soils and fertilizers (ISO 11466); As speciation in rice and seafood (FDA Elemental Analysis Manual Ch. 4); Hg quantification in fish tissue and human urine (CDC NHANES protocols); Cd/Pb testing in cosmetics per ASEAN Cosmetics Directive Annex II; and teaching-lab demonstrations of hydride generation kinetics and atomic spectroscopy fundamentals. Refurbished units undergo full functional validation across all application modules prior to return.

FAQ

What does the 12-hour response time cover?
Initial remote diagnostics, priority scheduling for on-site visits (within Beijing municipality), or expedited shipping logistics for benchtop return repair.

Do you replace original OEM parts during repair?
Yes—all critical components (pumps, valves, lamps, detectors, gas regulators) are sourced from JiTian-certified suppliers or original manufacturers, with full traceability documentation.

Can refurbished AFS-930 units be validated for ISO 17025 accreditation?
Yes—each refurbished unit receives a Certificate of Conformance, full performance verification report (including MDL, RSD, linearity, carryover), and optional IQ/OQ documentation package.

Is software licensing included in the service fee?
Licensing remains with the end-user; however, we provide installation, configuration, and license activation support for valid perpetual or subscription licenses.

Do you support instruments outside the JiTian brand?
Yes—we maintain technical expertise and spare parts inventories for major AFS platforms including PSA Analytical, Titan, and GBC, as well as complementary techniques (AAS, UV-Vis, ICP-OES).