Anjie AJ-510 Automated Sample Injector for Gas Phase Molecular Absorption Spectrometry
| Brand | Anjie |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Authorized Distributor |
| Instrument Category | Domestic |
| Model | AJ-510 |
| Quotation | Upon Request |
| Detector Type | Photomultiplier Tube (PMT) |
| Wavelength Range | 190–900 nm |
| Spectral Bandwidth | 2.0 nm |
| Wavelength Accuracy | ±0.2 nm |
| Wavelength Repeatability | ±0.1 nm |
Overview
The Anjie AJ-510 Automated Sample Injector is a precision-engineered peripheral system designed exclusively for integration with gas phase molecular absorption spectrometers (GPMAS), particularly the Anjie AJ-3600 and AJ-3700 series platforms. It operates on the principle of controlled liquid-phase sample introduction followed by quantitative chemical conversion (e.g., nitrite to NO gas, ammonium to NH3 gas) and subsequent gas-phase optical detection in the UV–Vis range (190–900 nm). The AJ-510 ensures reproducible, contamination-free sample handling—critical for trace-level analysis of nitrogenous compounds (NO2−, NO3−, NH4+, S2−, etc.) in environmental water, wastewater, and soil extracts per standardized methods including EPA Method 353.2, ISO 11905-1, and HJ/T 195–2005. Its mechanical architecture supports high-throughput batch analysis while maintaining sub-millimeter positional fidelity essential for alignment with GPMAS reaction cells and optical pathways.
Key Features
- Two configurable sample tray options: 51-position or 90-position PTFE-coated aluminum carousel, compatible with standard 12 × 75 mm or 16 × 100 mm borosilicate glass vials.
- Integrated intelligent calibration system: single-button auto-alignment routine achieves positioning accuracy < 1 mm across all tray positions, verified via optical encoder feedback and stepper motor closed-loop control.
- Dual-channel needle wash station: independently programmable inner- and outer-needle rinse cycles using deionized water or solvent; flow rate (0.1–5.0 mL/min) and dwell time fully adjustable via software interface to minimize carryover (< 0.05% typical).
- Controlled homogenization purge: inert gas (N2 or Ar) delivery to sample vials prior to aspiration, with user-defined flow rate (0–2.0 L/min) and duration (0–120 s) to ensure uniform suspension of particulate-containing matrices.
- Optically sealed sample chamber: transparent polycarbonate anti-contamination hood with integrated HEPA-filtered laminar airflow, reducing ambient particulate and volatile organic interference during extended unattended runs.
- Passive thermal management: fanless, convection-based heat dissipation architecture compliant with IEC 61000-6-3 EMC emission limits; no moving cooling components to compromise long-term reliability.
Sample Compatibility & Compliance
The AJ-510 accommodates aqueous, mildly acidic (pH 2–6), and chelated metal-containing samples without degradation of fluidic path integrity. All wetted materials—including stainless steel 316L needle, PTFE tubing, and ceramic syringe plunger—are certified non-reactive per USP Class VI and ISO 10993-5 standards. System operation adheres to GLP requirements for audit trail generation (via optional software module), supporting 21 CFR Part 11-compliant electronic signatures when deployed with validated Anjie GPMAS data acquisition software. Routine performance verification aligns with ASTM D5173 for automated liquid handlers and ISO/IEC 17025 clause 5.9 on equipment calibration traceability.
Software & Data Management
The AJ-510 communicates via RS-232 or USB 2.0 serial protocol with Anjie’s proprietary GPMAS control suite (v4.2+). Its embedded firmware enables full method synchronization: injection volume (10–500 µL), wash cycle sequence, purge parameters, and tray indexing are defined within the same method file governing spectrometer lamp warm-up, wavelength scan, and detector integration time. Audit logs record timestamped events—including vial ID, aspirate pressure, rinse volume, and positional error residuals—for post-run QC review. Optional standalone operation is supported through the AJ-510 Positioning Assistant Module, which provides real-time coordinate mapping and manual override via touchscreen GUI for maintenance or troubleshooting.
Applications
- Regulatory monitoring of nitrate/nitrite in drinking water per WHO Guideline Limits (≤ 50 µg/L NO3−-N, ≤ 3 µg/L NO2−-N)
- Wastewater treatment plant effluent compliance testing under EU Urban Wastewater Treatment Directive (91/271/EEC)
- Soil leachate analysis for ammonium migration studies in agricultural runoff assessments
- Pharmaceutical excipient purity screening where residual sulfide or cyanide must be quantified at sub-ppb levels
- Method validation support for laboratory accreditation against CNAS-CL01:2018 (equivalent to ISO/IEC 17025:2017)
FAQ
Is the AJ-510 compatible with non-Anjie GPMAS systems?
Yes—provided the host instrument supports TTL-level trigger input and accepts ASCII command sets over RS-232; custom integration protocols are available upon request.
What maintenance intervals are recommended for the syringe pump and needle assembly?
Syringe seals require replacement every 6 months under continuous operation; needle cleaning frequency depends on sample matrix—daily for high-salinity waters, weekly for purified standards.
Can the AJ-510 perform dilution series automatically?
No—the AJ-510 is a dedicated injector, not a dilutor; however, it can be sequenced with external peristaltic dilution modules via external relay control.
Does the system support barcode scanning for sample tracking?
Not natively; but third-party USB barcode readers may be integrated through the host PC’s OS-level input layer when used with Anjie’s method editor.
Is firmware upgrade capability built-in?
Yes—field updates are delivered via encrypted .bin files loaded through the USB port; version history and checksum verification are logged automatically.
