HUANKONG 3500 Automated Ammonia-Nitrogen & Total Nitrogen Analyzer
| Brand | HUANKONG |
|---|---|
| Origin | Shandong, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | 3500 |
| Pricing | Upon Request |
| Analytical Method | Nessler’s Reagent Spectrophotometry |
| Measurement Range | 0.03–2.0 mg/L NH₃–N |
| Accuracy | ±2% of reading |
Overview
The HUANKONG 3500 Automated Ammonia-Nitrogen & Total Nitrogen Analyzer is a fully integrated benchtop instrument engineered for regulatory-compliant determination of ammonia-nitrogen (NH₃–N) and total nitrogen (TN) in environmental water matrices—including surface water, groundwater, wastewater effluent, and drinking water sources. It implements the standardized Nessler’s reagent spectrophotometric method per China’s national standard HJ 535-2009 “Water Quality—Determination of Ammonia Nitrogen—Nessler’s Reagent Spectrophotometric Method”. Unlike manual or semi-automated approaches, the 3500 system eliminates human intervention in sample handling, reagent addition, digestion (where applicable), precipitation, optical measurement, and data reporting. Its architecture follows classical wet-chemistry photometric principles: ammonia in alkaline solution reacts with Nessler’s reagent to form a yellow-brown colloidal complex, the absorbance of which is measured at 420 nm using a stabilized tungsten-halogen light source and precision optical path. The analyzer is designed for high reproducibility, low operator dependency, and long-term stability in routine laboratory environments subject to GLP and environmental monitoring QA/QC requirements.
Key Features
- Fully automated workflow—from sample aspiration and precise reagent dosing to coagulation/flocculation, color development, photometric detection, and result calculation—executed without manual supervision.
- Dual-function capability: configured for both ammonia-nitrogen quantification (per HJ 535) and total nitrogen analysis when paired with optional UV/persulfate digestion module (compliant with HJ 636).
- Integrated multi-position autosampler supporting unattended batch processing of up to 60 samples per run; programmable sample order and priority sequencing.
- Onboard calibration management: automatic standard curve generation using user-defined concentration points; dynamic linear regression with R² validation and outlier rejection.
- Reagent delivery system with corrosion-resistant fluidic pathways, pressure-sensing peristaltic pumps, and real-time flow monitoring to prevent clogging and ensure volumetric accuracy.
- Embedded microprocessor control with password-protected method storage, audit-trail logging (user actions, timestamps, parameter changes), and compliance-ready event history export.
Sample Compatibility & Compliance
The 3500 analyzer accommodates raw, filtered, or centrifuged aqueous samples with turbidity ≤ 50 NTU and suspended solids < 100 mg/L. It handles matrix variations common in municipal wastewater, industrial discharge, and riverine samples through adaptive blank subtraction and internal reference correction. All operational protocols align with HJ 535-2009 and support traceability to ISO/IEC 17025:2017 requirements for testing laboratories. Data integrity meets basic ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate), with optional configuration for 21 CFR Part 11–compliant electronic signatures and audit trails when interfaced with validated LIMS or ELN platforms.
Software & Data Management
The instrument operates via Windows-based control software featuring intuitive graphical interface, method wizard setup, and real-time status dashboard. All measurements are timestamped and stored locally with metadata including sample ID, calibration ID, reagent lot numbers, operator ID, and environmental conditions (ambient temperature). Data export supports CSV, Excel (.xlsx), PDF report templates, and direct database push via ODBC. Remote diagnostics, firmware updates, and method backup/restore are supported over Ethernet or USB. Software logs retain ≥18 months of operational records by default, configurable for extended retention under site-specific QA policies.
Applications
- Regulatory compliance monitoring for wastewater treatment plants (WWTPs) reporting to local ecological environment bureaus.
- Environmental monitoring stations conducting routine surface water quality assessment under the National Surface Water Quality Monitoring Network.
- Industrial effluent laboratories performing pre-discharge verification per discharge permits.
- Research institutions studying nitrogen cycling dynamics in aquatic ecosystems.
- Educational laboratories requiring robust, repeatable teaching platforms for environmental chemistry curricula.
FAQ
Does the 3500 require hazardous reagent handling by operators?
No—Nessler’s reagent is dispensed automatically within sealed, ventilated reagent reservoirs; no manual pipetting or open-vessel manipulation is required.
Can the system analyze samples with high turbidity or color interference?
Yes—the built-in flocculation module removes particulates prior to colorimetry, and dual-wavelength compensation minimizes matrix interferences.
Is method validation documentation available for regulatory submission?
Yes—HUANKONG provides IQ/OQ documentation templates, performance qualification protocols, and a full analytical validation report covering specificity, linearity, LOD/LOQ, precision, and recovery per ICH Q2(R2).
What maintenance intervals are recommended for routine operation?
Daily: waste container emptying and optical window wipe. Weekly: pump tube inspection and fluidic path flush. Quarterly: photometer wavelength verification and calibration standard verification.
Can the 3500 be integrated into an existing laboratory information management system (LIMS)?
Yes—it supports ASTM E1384-compliant HL7 and ASTM E2500-compliant ASCII data exchange formats, with custom API integration available upon request.
