Jiada Xiaotian’e GDYS-302S Portable Total Nitrogen Speciation Analyzer (Ammonia-N, Nitrite-N, Nitrate-N)
| Brand | Jiada Xiaotian'e |
|---|---|
| Model | GDYS-302S |
| Instrument Type | Portable/handheld water quality analyzer |
| Detection Parameters | Ammonia nitrogen (NH₃-N), Nitrite nitrogen (NO₂⁻-N), Nitrate nitrogen (NO₃⁻-N) |
| Optical Source | High-brightness LED |
| Wavelengths | 430 nm, 538 nm |
| LOD | NH₃-N: 0.1 mg/L (as N), NO₂⁻-N: 0.01 mg/L (as N), NO₃⁻-N: 0.5 mg/L |
| Measurement Ranges | NH₃-N: 0.00–5.00 mg/L (as N), NO₂⁻-N: 0.00–0.40 mg/L (as N), NO₃⁻-N: 0.0–20.0 mg/L |
| Accuracy | ±5% FS |
| Power Supply | AC 220 V ±10%, 50 Hz ±2% or rechargeable Li-ion battery (7.4 V, 900 mAh) |
| Dimensions | 310 × 225 × 125 mm |
| Weight | 1.7 kg |
Overview
The Jiada Xiaotian’e GDYS-302S Portable Total Nitrogen Speciation Analyzer is a field-deployable photometric instrument engineered for simultaneous, on-site quantification of three critical nitrogen species in aqueous matrices: ammonia nitrogen (NH₃-N), nitrite nitrogen (NO₂⁻-N), and nitrate nitrogen (NO₃⁻-N). It operates on the principle of colorimetric analysis—each analyte undergoes a selective chemical reaction with proprietary reagents to form stable chromophores with characteristic absorption maxima. Dual-wavelength optical detection (430 nm and 538 nm) enables precise absorbance measurement while minimizing interferences from turbidity or background coloration. Designed for environmental monitoring professionals, drinking water operators, and field technicians, the GDYS-302S delivers laboratory-grade data without requiring benchtop infrastructure. Its compact architecture and integrated rechargeable power system support extended deployment in remote sampling locations, mobile labs, emergency response units, and regulatory inspection workflows.
Key Features
- Dual-wavelength photometric detection using high-stability, long-life LEDs—no warm-up time or lamp replacement required
- Pre-calibrated, sealed reagent cartridges for NH₃-N, NO₂⁻-N, and NO₃⁻-N, ensuring batch-to-batch reproducibility and minimizing operator error
- Integrated calibration verification protocol compliant with ISO 8466-1 for analytical curve validation
- On-device data storage for ≥500 test records with timestamp, operator ID, and location metadata (GPS optional via Bluetooth pairing)
- Ruggedized ABS housing rated IP65 for dust and water resistance; designed to withstand transport shock and ambient temperature fluctuations (5–40 °C operating range)
- Intuitive graphical interface with multilingual support (English, Spanish, French, Portuguese) and contextual help prompts
Sample Compatibility & Compliance
The GDYS-302S is validated for use with raw and treated drinking water, groundwater, surface water (rivers, lakes, reservoirs), and wastewater effluents meeting EPA Method 350.1 (ammonia), EPA Method 354.1 (nitrate/nitrite), and ISO 7890-2/3 (ammonia and nitrite). Sample pretreatment is minimal: filtration through 0.45 µm membrane prior to analysis is recommended for turbid or particulate-laden samples. The instrument’s measurement ranges align with WHO Guidelines for Drinking-water Quality (4th ed.) and EU Directive 2020/2184 thresholds for NH₃-N (<0.5 mg/L), NO₂⁻-N (<0.1 mg/L), and NO₃⁻-N (<50 mg/L). All reagent formulations comply with REACH Annex XVII restrictions and are non-hazardous for air transport (UN 3082 classification not applicable).
Software & Data Management
Data export is supported via USB-C and Bluetooth 5.0 to Windows/macOS desktop applications and Android/iOS mobile apps. Raw absorbance values, calibration coefficients, and QC flagging (e.g., out-of-range blank, drift alert) are retained in CSV and XML formats compatible with LIMS integration. Audit trail functionality meets GLP requirements per OECD Series on Principles of Good Laboratory Practice (ENV/MC/CHEM(98)17), including immutable timestamps, user authentication logs, and change history for calibration parameters. Optional cloud synchronization enables real-time dashboarding and automated report generation aligned with ISO/IEC 17025:2017 clause 7.7 (result reporting).
Applications
- Routine compliance monitoring of municipal drinking water distribution systems and source water intakes
- Field verification during wastewater treatment plant upgrades or denitrification process optimization
- Emergency response screening following agricultural runoff events or septic system failures
- Educational use in university environmental science laboratories for method validation exercises
- Regulatory field audits by national environmental agencies conducting spot checks under national water quality standards
FAQ
What sample volume is required per test?
Each assay requires 5.0 mL of filtered sample—no dilution or concentration steps are necessary within the specified measurement ranges.
Is method validation documentation available?
Yes: full validation reports—including precision (RSD ≤4.2%), linearity (R² ≥0.999), spike recovery (92–103%), and interference studies—are supplied with each instrument shipment and accessible via the manufacturer’s secure portal.
Can the GDYS-302S be used for seawater analysis?
Not without matrix-specific adaptation: high chloride content interferes with nitrite determination; users must perform salinity-matched calibration and apply correction factors per ASTM D3867–18 Annex A1.
How often must the optical path be cleaned?
The cuvette chamber and LED/receiver optics require cleaning only after every 100 tests or if visible residue accumulates—cleaning protocol uses lint-free wipes and deionized water, no solvents required.
Does the device support external GPS tagging?
Yes: Bluetooth-paired GNSS receivers (e.g., Garmin GLO 2, Bad Elf GPS Pro+) provide georeferenced metadata synchronized to each test record in exported files.
