Jiada Xiaotian’e GDYS-101SX Nitrite Nitrogen Analyzer
| Brand | Jiada Xiaotian'e |
|---|---|
| Origin | Jilin, China |
| Manufacturer Type | Direct Manufacturer |
| Origin Category | Domestic (China) |
| Model | GDYS-101SX |
| Pricing | Available Upon Request |
| Detection Limit | 0.01 mg/L |
| Measurement Range | 0.00–0.40 mg/L |
| Accuracy | ±5% |
| Method Compliance | GB/T 5750.5–2006 |
| Analysis Time | ≤20 minutes per sample |
| Reagent Format | Single-use, pre-packaged test kits |
Overview
The Jiada Xiaotian’e GDYS-101SX Nitrite Nitrogen Analyzer is a portable, field-deployable photometric instrument engineered for rapid, quantitative determination of nitrite nitrogen (NO₂⁻–N) in drinking water, surface water, groundwater, and wastewater effluents. It operates on the principle of diazotization-coupling spectrophotometry—where nitrite ions react under acidic conditions with sulfanilamide to form a diazonium salt, which subsequently couples with N-(1-naphthyl)ethylenediamine dihydrochloride (NED) to yield a stable pink-colored azo dye. Absorbance is measured at 540 nm using an integrated solid-state optical system with a high-stability LED light source and silicon photodetector. This method is fully aligned with the Chinese national standard GB/T 5750.5–2006, Section 8.1 (“Determination of Nitrite Nitrogen in Drinking Water”), ensuring regulatory traceability and methodological equivalence to laboratory-grade benchtop procedures.
Key Features
- Field-optimized design with integrated rechargeable battery (≥8 hours continuous operation) and ruggedized ABS housing rated IP65 for dust and water resistance.
- Dual-wavelength auto-zeroing and built-in calibration verification routine to maintain optical path stability across ambient temperature fluctuations (10–35 °C operating range).
- Pre-programmed measurement protocol with automatic timing control—eliminates manual stopwatch dependency and reduces operator-induced variability.
- Single-use, factory-sealed reagent kits containing precisely dosed sulfanilamide and NED reagents; each kit is lot-numbered and includes batch-specific calibration curves stored in instrument memory.
- On-device data storage for up to 500 test records, including date/time stamp, sample ID, operator code, and raw absorbance values.
- USB-C interface supporting direct data export to CSV format for integration with LIMS or QA/QC reporting platforms.
Sample Compatibility & Compliance
The GDYS-101SX accepts clarified aqueous samples without filtration for most potable and low-turbidity natural waters (turbidity < 5 NTU). For wastewater or high-solids matrices, optional centrifugation or membrane filtration (0.45 µm) is recommended prior to analysis. The instrument meets essential performance criteria outlined in ISO 8467:1993 (Water quality — Determination of nitrite — Spectrometric method) and supports compliance workflows aligned with China’s Ministry of Ecology and Environment (MEE) monitoring requirements for Class I–III surface water bodies. While not FDA 21 CFR Part 11–certified out-of-the-box, audit trail functionality—including user login, result modification logs, and electronic signature prompts—can be enabled via firmware update to support GLP-aligned field laboratories.
Software & Data Management
Instrument firmware supports firmware-over-the-air (FOTA) updates via USB or optional Bluetooth 5.0 module (sold separately). The companion desktop software (GDYS DataLink v3.2) enables batch report generation compliant with GB/T 27025–2019 (General requirements for the competence of testing and calibration laboratories). All measurement sessions include mandatory metadata entry (e.g., sampling location GPS coordinates, analyst ID), and raw data files are cryptographically hashed to prevent tampering. Exported datasets include uncertainty estimates derived from method repeatability (RSD ≤4.2%, n=6 at 0.10 mg/L) and reagent lot-specific bias corrections.
Applications
- Routine surveillance of nitrite nitrogen in municipal drinking water distribution systems during chloramination or nitrification breakthrough events.
- Emergency response screening following agricultural runoff incidents or manure lagoon breaches where nitrite accumulation poses acute toxicity risk to infants and aquatic life.
- Validation of denitrification efficiency in constructed wetlands and tertiary wastewater treatment units.
- Educational use in environmental science curricula for teaching colorimetric assay principles, method validation, and field analytical quality control.
- Regulatory compliance monitoring for rural water supply projects funded under China’s Rural Revitalization Strategy (2021–2035).
FAQ
Is this instrument suitable for seawater analysis?
No—high chloride concentrations (>500 mg/L) interfere with the diazotization reaction; seawater requires matrix-matched calibration or alternative methods such as ion chromatography.
Can reagent kits be stored at room temperature?
Yes—kits are desiccated and vacuum-sealed; shelf life is 18 months at 4–30 °C. Avoid exposure to direct sunlight or humidity >60% RH.
Does the analyzer require annual third-party calibration?
Not required—built-in optical self-check and factory-traceable reference filters enable user-performed verification per GB/T 5750.1–2023 Annex C. External calibration is recommended only after physical impact or prolonged storage (>6 months).
How is method accuracy verified during field use?
Each kit includes a certified reference material (CRM) spike vial (0.20 ± 0.01 mg/L NO₂⁻–N); recovery must fall within 95–105% to validate run integrity.
Is technical support available in English?
Yes—Jiada Xiaotian’e provides bilingual (CN/EN) documentation, remote diagnostics via TeamViewer, and application engineering consultation through its Beijing-based International Technical Service Center.
