Yoke RG-3608AA Atomic Absorption Spectrophotometer
| Brand | Yoke |
|---|---|
| Origin | Shanghai, China |
| Model | RG-3608AA |
| Wavelength Range | 190 nm – 900 nm |
| Wavelength Repeatability | ≤ 0.05 nm |
| Wavelength Accuracy | ±0.1 nm |
| Photometric Range (Absorbance) | 0 – 2.0 A |
| Background Correction | Deuterium Lamp + Self-Reversal Full-Spectrum Correction |
| Lamp Holder | 8-position, 360° Rotating, Compatible with High-Performance Hollow Cathode Lamps |
| Optical System | Single-Beam, All-Reflective Optics |
| Atomizer Type | Flame-Based Atomization System |
| Software Platform | RG-WinAAS Workstation (Windows OS) |
Overview
The Yoke RG-3608AA Atomic Absorption Spectrophotometer is a single-beam, flame-based analytical instrument engineered for quantitative elemental analysis in laboratory and quality control environments. It operates on the principle of atomic absorption spectroscopy (AAS), wherein ground-state atoms in a flame atomizer absorb characteristic radiation emitted by element-specific hollow cathode lamps. The instrument measures absorbance at discrete wavelengths across a broad spectral range (190–900 nm), enabling precise determination of metal concentrations—including Na, K, Ca, Mg, Fe, Cu, Zn, Pb, Cd, and Cr—in aqueous samples, digests, and environmental or biological matrices. Its all-reflective optical design eliminates chromatic aberration and minimizes stray light, contributing to high signal-to-noise ratio and measurement stability. Designed for routine use in academic, industrial, and regulatory laboratories, the RG-3608AA complies with fundamental performance requirements outlined in ASTM E1905, ISO 7149, and USP , supporting trace-level quantification down to sub-ppb levels when coupled with optimized sample introduction and calibration protocols.
Key Features
- All-reflective optical path architecture ensures consistent spectral fidelity and long-term photometric stability without wavelength-dependent dispersion errors.
- Integrated intelligent gas control module regulates acetylene/air or nitrous oxide/acetylene flame conditions with real-time pressure monitoring and automatic shut-off logic for enhanced operational safety.
- Dual-mode background correction: deuterium lamp continuum source correction (190–350 nm) combined with self-reversal (SR) correction for high-accuracy compensation of structured molecular absorption and scattering effects across the full wavelength range.
- 8-position rotating lamp turret with motorized alignment enables rapid, software-driven lamp selection and auto-focusing—reducing manual intervention and improving inter-lamp reproducibility.
- Flame atomizer features precision-engineered nebulizer, impact bead, and burner head assembly; vertical burner alignment and automated lift mechanism ensure repeatable sample introduction geometry and optimal atom cloud positioning.
- RG-WinAAS workstation software provides method development, multi-point calibration (linear and non-linear), QC check routines (e.g., bracketing standards, duplicate analysis), and audit-ready data export compliant with GLP documentation practices.
Sample Compatibility & Compliance
The RG-3608AA is validated for use with liquid samples introduced via pneumatic nebulization—suitable for acid-digested environmental samples (EPA Method 200.7, 200.9), food extractates (AOAC 984.27), clinical serum/plasma preparations, and pharmaceutical excipient testing. Sample volumes typically range from 2–5 mL per analysis, with detection limits dependent on element and matrix but generally meeting or exceeding EPA-defined criteria for regulated metals. Instrument performance verification follows manufacturer-recommended procedures aligned with ISO/IEC 17025 technical competence requirements. While not pre-certified for FDA 21 CFR Part 11, the RG-WinAAS software supports user-defined electronic signatures, password-protected method locking, and timestamped audit trails—facilitating internal validation for GMP/GLP-aligned workflows.
Software & Data Management
RG-WinAAS is a Windows-native application built on a modular architecture supporting method templates, sequence scheduling, and real-time spectral display. Raw absorbance data are stored in proprietary binary format with embedded metadata (lamp ID, wavelength, slit width, integration time, gas flow settings). Export options include CSV, TXT, and PDF report generation with customizable headers, statistical summaries (RSD%, recovery %), and calibration curve overlays. Data integrity safeguards include write-protected archive folders, session log files, and optional database integration via ODBC drivers for enterprise-level LIMS connectivity. All software updates are distributed through Yoke’s authorized technical support portal—no internet dependency required during routine operation.
Applications
- Environmental monitoring: quantification of heavy metals in drinking water, wastewater, soil leachates, and air particulate filters.
- Clinical chemistry: determination of essential and toxic elements in whole blood, urine, and serum for nutritional assessment or poisoning diagnostics.
- Pharmaceutical QA/QC: elemental impurity screening per ICH Q3D guidelines using compendial methods adapted for flame-AAS.
- Food safety: analysis of mineral fortification (e.g., Fe in cereals) and contaminant surveillance (e.g., Pb in spices).
- Geological and metallurgical labs: rapid assay of ore concentrates, alloys, and refinery intermediates.
FAQ
What types of lamps are compatible with the RG-3608AA?
The 8-position turret accepts standard 1.5-inch diameter hollow cathode lamps (HCLs) and electrodeless discharge lamps (EDLs) from major global suppliers—no proprietary socket interface is required.
Is graphite furnace capability available as an upgrade?
No—the RG-3608AA is configured exclusively for flame atomization. Yoke offers separate graphite furnace models (e.g., GF-3608 series) for ultra-trace analysis requiring lower detection limits.
Does the instrument support automated sample introduction?
It interfaces with third-party autosamplers via RS-232 or USB-serial emulation; however, no integrated autosampler is included with the base configuration.
How often must the deuterium lamp be replaced?
Typical service life exceeds 500 hours under normal usage; replacement is indicated by reduced background correction efficiency or failure to achieve specified baseline noise specifications.
Can RG-WinAAS generate 21 CFR Part 11-compliant reports?
While the software includes foundational controls (user roles, audit logs, electronic signatures), full Part 11 compliance requires site-specific validation—including risk assessment, change control documentation, and periodic requalification per organizational SOPs.
