Hanon D200 Dumas Nitrogen Determinator
| Brand | Hanon |
|---|---|
| Origin | Shandong, China |
| Model | D200 |
| Analysis Principle | Dumas Combustion Method |
| Nitrogen Range | 0.1–500 mg |
| Sample Throughput | 3–4 min per sample |
| Repeatability | ≤0.5% RSD |
| Sample Mass | ≤1 g (solid) or ≤1 mL (liquid) |
| Recovery Rate | ≥99.5% |
| Power Consumption | 2000 W |
| Dimensions (L×W×H) | 735 mm × 560 mm × 560 mm |
| Detector | Thermal Conductivity Detector (TCD) |
| TCD Temperature Stability | ≤0.01 °C |
| Combustion Furnace Max Temp | 1200 °C |
| Carrier Gas | CO₂ (≥99.999% purity) |
| Oxygen Purity | ≥99.999% |
| Autosampler | 120-position single tray |
| Weight | 80 kg |
Overview
The Hanon D200 Dumas Nitrogen Determinator is a fully automated elemental analyzer engineered for precise, high-throughput quantification of total nitrogen in organic and inorganic matrices using the standardized Dumas combustion method. It operates on the principle of high-temperature oxidative pyrolysis under pure oxygen flow, followed by catalytic reduction of nitrogen oxides to molecular nitrogen (N₂), which is then quantified via high-stability thermal conductivity detection (TCD). Unlike Kjeldahl-based systems, the D200 requires no acid digestion, hazardous reagents, or lengthy sample preparation—enabling direct analysis of solids, liquids, and slurries with minimal operator intervention. The instrument complies with multiple international and national standards including ISO 1871, AOAC 992.15, ASTM D5133, and a comprehensive suite of Chinese GB/T, NY/T, and SN/T methods for food, feed, fertilizer, soil, biofuel, and environmental applications.
Key Features
- Two-stage combustion architecture: Primary oxidation at up to 1200 °C in pure O₂, followed by secondary catalytic oxidation in a Pt/CuO-packed tube to ensure complete conversion of refractory nitrogen compounds.
- Triple-stage water removal system: First-stage electronic condensation removes >95% of H₂O vapor; second- and third-stage chemical drying using dual desiccant traps extends desiccant service life to ≥2000 analyses.
- High-integrity gas management: Dual-pressure regulation, SMC® pneumatic components (rated for ≥10⁵ cycles), Bronkhorst® mass flow controllers, and PTFE-lined tubing with quick-connect fittings ensure long-term pressure stability and leak-free operation.
- 120-position autosampler with non-contact infrared sample-in-place detection: Enables unattended batch processing and real-time collision avoidance during self-diagnostic routines.
- Patented high-temperature modular coupling (CN106443029B): Allows rapid, tool-free replacement of combustion and reduction tubes without compromising gas-tight integrity.
- Intelligent oxygen dosing algorithm: Dynamically adjusts O₂ flow based on sample mass and matrix type to minimize还原 agent consumption and extend catalyst lifetime (≥1000 runs per tube set).
Sample Compatibility & Compliance
The D200 accommodates heterogeneous sample types—including cereals, meat products, dairy, wine, animal feed, urea-based diesel exhaust fluid (AUS 32), fertilizers, soils, and biomass—without matrix-specific method development. Its performance meets or exceeds validation criteria specified in GB 5009.5-2016 (food protein), GB/T 31578-2015 (grains), NY/T 2542-2014 (fertilizer N), and SN/T 3097-2012 (combustion-based N determination). All hardware and software components are designed to support GLP/GMP-compliant workflows, with full traceability aligned to ISO/IEC 17025 requirements for testing laboratories.
Software & Data Management
The Windows-based control software provides intuitive method setup, real-time instrument status monitoring, and integrated data handling. Key capabilities include: FDA 21 CFR Part 11-compliant audit trail with role-based user permissions; wireless balance integration (industrial-grade 2.4 GHz module, 100 m range); customizable report templates with embedded lab logos and unit definitions; automatic maintenance scheduling based on cumulative O₂ consumption, sample count, and component runtime; 23 built-in diagnostic checks with contextual pop-up alerts; linear and non-linear calibration with up to five-point curve fitting; and native LIMS connectivity via RS232 or USB virtual COM port. Data export supports CSV, Excel, and PDF formats with embedded metadata (operator ID, timestamp, method version, calibration history).
Applications
The D200 delivers reliable nitrogen quantification across regulated and research-intensive domains: quality control of agricultural inputs (compound fertilizers per GB/T 15063-2020, BB fertilizers per GB/T 21633-2020); nutritional labeling of food and feed (crude protein calculation per GB/T 24318-2009); compliance testing of AUS 32 solutions (GB 29518-2013); environmental monitoring of soil and compost nitrogen pools; and R&D in bioenergy and forestry (GB/T 35809-2018). Its robustness and reproducibility make it suitable for contract testing labs requiring high daily throughput (>100 samples) and regulatory audit readiness.
FAQ
What standards does the D200 comply with?
It conforms to over 15 Chinese national and industry standards (e.g., GB 5009.5-2016, GB/T 31578-2015, NY/T 2542-2014) as well as internationally recognized protocols including AOAC 992.15 and ISO 1871.
Can the D200 analyze liquid samples directly?
Yes—liquids up to 1 mL volume can be introduced via weighed vials or capillary tubes without derivatization or dilution.
Is the software compliant with FDA 21 CFR Part 11?
Yes—audit trail, electronic signatures, user access controls, and data immutability features are fully implemented and validated.
What is the expected lifetime of consumables?
Combustion and reduction tubes: ≥1000 analyses; desiccant cartridges: ≥2000 analyses; autosampler syringes and seals: ≥50,000 cycles.
Does the system support remote diagnostics?
Yes—the embedded RS485 bus enables firmware-level communication with service engineers for predictive maintenance and fault isolation.
