Yoke RG-3618AA Dual-Beam Atomic Absorption Spectrophotometer
| Brand | Yoke |
|---|---|
| Origin | Shanghai, China |
| Model | RG-3618AA |
| Wavelength Range | 190–900 nm |
| Wavelength Repeatability | ≤0.05 nm |
| Wavelength Accuracy | ±0.1 nm |
| Photometric Range | 0–2.0 A (Absorbance) |
| Optical System | Dual-Beam |
| Lamp Positions | 8-position rotating turret (compatible with high-performance hollow cathode lamps) |
| Background Correction | Combined deuterium lamp and self-reversal (SR) full-spectrum background correction |
Overview
The Yoke RG-3618AA Dual-Beam Atomic Absorption Spectrophotometer is a benchtop analytical instrument engineered for quantitative elemental analysis in trace metal applications. It operates on the principle of atomic absorption spectroscopy (AAS), where ground-state free atoms in a flame atomizer absorb characteristic radiation emitted by element-specific hollow cathode lamps. The dual-beam optical architecture—comprising separate sample and reference beam paths—minimizes drift from source intensity fluctuations and detector thermal noise, delivering enhanced baseline stability and measurement reproducibility over extended acquisition periods. Designed for routine laboratory use in environmental monitoring, food safety testing, pharmaceutical quality control, and geological sample analysis, the RG-3618AA integrates flame atomization with robust background correction to ensure accurate quantification even in complex matrices containing spectral interferences.
Key Features
- Dual-beam optical design with fully reflective optics, optimized for high signal-to-noise ratio (SNR) across the 190–900 nm spectral range
- 8-position motorized lamp turret with 360° rotation and automatic lamp selection—supports standard and high-intensity hollow cathode lamps without manual realignment
- Intelligent gas control module with integrated flame safety interlocks, real-time pressure monitoring, and auto-shutdown protocols compliant with ISO 22196 and laboratory best practices for flame-based instrumentation
- Hybrid background correction system combining continuous-source deuterium lamp (D₂) and self-reversal (SR) techniques, enabling accurate compensation across broad spectral regions—including structured molecular bands and non-atomic scattering
- Automated wavelength scanning and peak-hold functions, with ≤0.05 nm repeatability and ±0.1 nm absolute accuracy traceable to NIST-certified wavelength standards
- Motorized, software-controlled atomizer height adjustment for optimal sensitivity tuning per element—reducing manual optimization time and operator variability
Sample Compatibility & Compliance
The RG-3618AA accommodates aqueous and acid-digested liquid samples compatible with air-acetylene flame atomization. It supports standard ASTM D1688 (copper in water), EPA Method 7000B (metals in wastewater), and ISO 11885 (water quality—determination of selected elements by AAS). Instrument firmware and data handling workflows align with GLP requirements, including electronic signature support, audit trail logging, and user-access-level configuration (administrator/operator modes). While not pre-certified for FDA 21 CFR Part 11, the system’s RG-WinAAS software architecture provides configurable audit trail parameters, secure user authentication, and immutable raw-data export—facilitating internal validation for regulated environments.
Software & Data Management
RG-WinAAS is a Windows-native application built on Microsoft .NET Framework, offering method development, sequence programming, calibration curve generation (linear, quadratic, and weighted least-squares), and QC reporting (spike recovery, duplicate precision, LLOQ/ULOQ verification). All spectra, absorbance values, and instrument parameter logs are stored in encrypted binary format with timestamped metadata. Raw data exports support CSV, TXT, and XML schemas for integration with LIMS platforms. Software updates are delivered via signed installer packages; version history and change logs are retained within the application interface for compliance documentation.
Applications
- Quantitative determination of Ca, Mg, Fe, Zn, Cu, Mn, Pb, Cd, and Cr in drinking water per WHO and EU Directive 98/83/EC
- Trace metal profiling in soil extracts and plant digests for agricultural research (ISO 11047, ISO 13878)
- Residual catalyst metal analysis (e.g., Pd, Ni) in active pharmaceutical ingredients (APIs) per ICH Q2(R2) guidelines
- Quality assurance of nutritional supplements—verification of label claims for mineral content (USP , , )
- Monitoring heavy metal leaching from packaging materials (EN 1388-1, EN 1388-2)
FAQ
Does the RG-3618AA support graphite furnace atomization?
No—the RG-3618AA is configured exclusively for flame atomization. Graphite furnace capability requires hardware redesign including electrothermal control electronics, Zeeman background correction, and vacuum-compatible optical path sealing.
Is RG-WinAAS validated for GxP environments?
RG-WinAAS is designed to support GxP validation activities (e.g., IQ/OQ/PQ), but formal qualification must be performed by the end user or qualified third party per their SOPs and regulatory scope.
Can the instrument be integrated into an automated sample introduction system?
Yes—the RG-3618AA provides RS-232 and USB device interfaces compatible with standard autosampler communication protocols (e.g., ASX-100 series); custom API integration requires coordination with Yoke technical support.
What maintenance intervals are recommended for the optical system?
Mirror alignment verification is advised every 6 months or after 500 operating hours; quartz windows and burner heads require cleaning after each batch of high-salt samples to prevent deposition-induced signal drift.
Is NIST-traceable calibration available for this model?
NIST-traceable wavelength and photometric calibration kits (e.g., Holmium oxide filter, neutral density filters) are supported; factory calibration certificates are provided upon request at time of shipment.
