Hanon K9860 Fully Automated Kjeldahl Nitrogen Analyzer
| Brand | Hanon |
|---|---|
| Origin | Shandong, China |
| Model | K9860 |
| Nitrogen Determination Range | 0.1 mg – 200 mg |
| Distillation Time | 5–10 min per sample |
| Repeatability | ±0.5% RSD |
| Sample Weight Capacity | ≤5 g (solid), ≤20 mL (liquid) |
| Nitrogen Recovery Rate | ≥99.5% |
| Power Consumption | 2 kW |
| Dimensions (L×W×H) | 455 mm × 391 mm × 730 mm |
| Touchscreen | 5.6-inch color LCD |
| Titration Resolution | 2.0 µL/step |
| Cooling Water Flow | 1.5 L/min |
| Data Storage | 1000 methods/results |
| Voltage | 220 VAC ±10%, 50 Hz |
| Net Weight | 38 kg |
Overview
The Hanon K9860 Fully Automated Kjeldahl Nitrogen Analyzer is an integrated, benchtop analytical system engineered for precise and reproducible nitrogen quantification based on the classical Kjeldahl digestion–distillation–titration methodology. It automates the complete workflow—from alkaline distillation of ammonium salts liberated during sample digestion, through condensation and quantitative trapping in boric acid solution, to colorimetric endpoint detection via high-resolution micro-titration. Designed for routine compliance with international standard methods—including AOAC 984.13, ISO 8968-1, GB/T 6423, and USP —the K9860 delivers trace-level accuracy (0.1 mg N lower detection limit) and robust inter-laboratory reproducibility (≤0.5% RSD), making it suitable for regulated environments requiring documented method validation and audit-ready operation.
Key Features
- Fully automated sequence control: distillation, titration, calculation, thermal printing, receiving cup ejection, and auto-rinsing—all executed without manual intervention.
- External titration cup configuration enables real-time visual monitoring of the titration process and immediate operator verification of endpoint clarity.
- High-precision piston-driven reagent dosing pump and linear-motor-controlled titration system deliver 2.0 µL/step resolution, eliminating electrode-based potentiometric titration dependencies and associated calibration drift or membrane fouling.
- 5.6-inch color touchscreen interface with intuitive icon-driven navigation supports multilingual UI (English default), method parameterization, user-level access control, and on-screen diagnostics.
- Comprehensive safety architecture includes steam generator overtemperature cutoff, condenser water flow sensor, safety door interlock, and real-time pressure monitoring—fully compliant with IEC 61010-1 requirements for laboratory equipment.
- Optimized thermal management and insulated steam pathways reduce cycle time to 5–10 minutes per sample while maintaining stoichiometric completeness and minimizing ammonia loss.
Sample Compatibility & Compliance
The K9860 accommodates a broad range of organic matrices: solid samples up to 5 g (e.g., cereal grains, meat meals, soil) and liquid samples up to 20 mL (e.g., milk, fermentation broths, wastewater digests). Its validated nitrogen recovery rate of ≥99.5% meets AOAC and ISO criteria for method accuracy across diverse sample types. The system supports GLP/GMP-aligned documentation practices—including electronic signature support, audit trail logging (per FDA 21 CFR Part 11 principles), and secure user authentication—and is routinely deployed in laboratories subject to CNAS, CMA, and USDA-AMS accreditation audits.
Software & Data Management
Embedded firmware provides full method storage (up to 1000 protocols), automatic result calculation (N → protein conversion using customizable factors), and direct export of CSV-formatted reports via USB port. All critical operational events—including reagent consumption, distillation temperature profiles, titration curves, and error codes—are timestamped and retained locally. Optional Ethernet connectivity enables integration into LIMS environments via Modbus TCP or HL7-compatible middleware. Data integrity safeguards include write-protected memory partitions and tamper-evident log files.
Applications
The K9860 serves as a primary nitrogen determination platform in food and feed quality control labs (e.g., dairy protein labeling, pet food compliance), agricultural research (soil fertility assessment, fertilizer efficacy trials), environmental testing (wastewater TN analysis, sludge characterization), pharmaceutical raw material verification (excipient nitrogen content), and academic teaching laboratories conducting standardized analytical chemistry experiments. Its reliability under high-throughput conditions (>50 samples/day) and low maintenance footprint make it especially suited for contract testing facilities and regional regulatory centers.
FAQ
Does the K9860 require external cooling water circulation?
No—it operates with ambient tap water at 1.5 L/min flow; no chiller or recirculation unit is needed.
Can the instrument be validated per ISO/IEC 17025 requirements?
Yes—its documented performance specifications, traceable calibration procedures, and built-in system suitability checks support full method validation and uncertainty estimation.
Is boric acid concentration configurable in the titration protocol?
Yes—users can define custom boric acid molarity and indicator composition (methyl red–bromocresol green) within method parameters.
What maintenance intervals are recommended for long-term precision?
Piston pump seals and distillation trap O-rings should be inspected every 6 months; full system performance verification is advised annually using certified reference materials (e.g., EDTA-N, glycine).
Does the system support remote diagnostics or firmware updates?
Firmware updates are performed locally via USB; remote diagnostic access is not enabled by default but may be configured under controlled network policies with IT security review.
