Hanon K9840 Automated Kjeldahl Nitrogen Determinator
| Brand | Hanon |
|---|---|
| Origin | Shandong, China |
| Model | K9840 |
| Nitrogen Determination Range | 0.1–240 mg N |
| Distillation Time | 0–60 min |
| Repeatability | ±0.5% |
| Sample Weight Capacity | ≤6 g (solid) / ≤16 mL (liquid) |
| Nitrogen Recovery Rate | ≥99.5% |
| Power Consumption | 1.3 kW |
| Dimensions (L×W×H) | 400 × 385 × 735 mm |
| Net Weight | 30 kg |
| Compliance | GB, NY, HJ, Chinese Pharmacopoeia, AOAC Official Methods, ISO 8968 & ISO 5983 |
Overview
The Hanon K9840 Automated Kjeldahl Nitrogen Determinator is an integrated, fully automated system engineered for precise and reproducible total nitrogen quantification in organic and inorganic matrices via the classical Kjeldahl digestion–distillation–titration principle. Designed for routine high-throughput laboratories in food, feed, pharmaceutical, agricultural, and environmental sectors, the instrument performs complete digestion product distillation, condensation, boric acid absorption, and endpoint detection—without manual intervention. Its operation adheres to internationally recognized standard methods including AOAC 981.10, ISO 5983-1:2009 (animal feeding stuffs), ISO 8968-1:2014 (milk and milk products), and USP residual solvent testing protocols where nitrogen content serves as a critical quality attribute. The system employs a sealed, pressure-regulated steam distillation module with real-time temperature monitoring of the heating element (up to 400 °C) and volumetric reagent dosing to ensure stoichiometric control over alkalization and neutralization steps.
Key Features
- 4.3-inch high-resolution TFT color touchscreen with intuitive multilingual UI (English, Chinese, Spanish, Portuguese), supporting both automatic and manual operational modes with seamless switching
- Automated reagent delivery system: precise metering of NaOH solution, boric acid absorbent, and dilution water—each independently calibrated via built-in calibration routines (dilution water, alkali, boric acid, rinse water)
- Intelligent safety architecture: interlocked digestion tube positioning sensor, real-time condenser water flow monitoring via digital flowmeter, door-open detection, and emergency stop button with hardware-level cutoff
- Self-diagnostic firmware with audible/visual fault alerts covering steam generator status, condenser cooling efficiency, liquid level sensors, and peristaltic pump function
- Optimized vapor pathway design using corrosion-resistant PTFE and borosilicate glass components; extended service life of fluidic manifolds through ABS engineering plastic chassis and precision die-cast housing
- Programmable distillation duration (0–60 min), adjustable steam intensity, and post-distillation auto-rinse cycle ensuring quantitative ammonia transfer and minimal carryover
Sample Compatibility & Compliance
The K9840 accommodates heterogeneous sample types—including powdered solids (≤6 g), viscous slurries, clear liquids (≤16 mL), and digested homogenates—within standardized Kjeldahl digestion tubes (e.g., 100–300 mL capacity). It supports method validation under GLP and GMP frameworks, with audit-trail-capable software logs (optional upgrade) compliant with FDA 21 CFR Part 11 requirements. All operational parameters meet or exceed performance criteria defined in AOAC 984.13, ISO 5983-2:2019, and national standards GB/T 6423–2021 (feed analysis) and NY/T 2792–2015 (soil testing). Recovery validation across certified reference materials (CRMs) such as BCR-68, NIST SRM 1577c (bovine liver), and AOAC 990.13 milk powder consistently achieves ≥99.5% nitrogen recovery with RSD <0.5% (n=10).
Software & Data Management
The embedded control software provides full method configuration, sequence scheduling, and real-time process visualization—including live status indicators for digestion tube presence, condenser water flow rate (1.5 L/min nominal), steam chamber temperature, and distillation progress bar. Data export is supported via USB 2.0 to CSV or PDF formats. Optional PC-based Hanon LabSuite software enables centralized instrument fleet management, electronic signature support, user permission tiers (admin/operator/auditor), and raw data archiving with time-stamped metadata. All calibration events, error logs, and maintenance records are timestamped and non-erasable, facilitating regulatory inspections and ISO/IEC 17025 accreditation readiness.
Applications
The K9840 delivers robust nitrogen determination in diverse regulated workflows: crude protein calculation in dairy and infant formula (per ISO 8968), total Kjeldahl nitrogen (TKN) in wastewater and soil extracts (per EPA 351.2 and HJ 717–2014), amino acid profiling support in biopharmaceutical upstream processing, and quality control of nitrogen-containing excipients in solid oral dosage forms. Its reliability has been validated across >10,000 installations in QC labs of leading enterprises in China’s dairy industry (e.g., Yili, Mengniu), agrochemical manufacturers, and CROs performing contract testing for EU and US market submissions.
FAQ
Does the K9840 comply with AOAC and ISO Kjeldahl method requirements?
Yes—it is validated for AOAC 981.10, ISO 5983-1:2009, and ISO 8968-1:2014, with documented recovery and repeatability performance.
Can the instrument be integrated into a LIMS environment?
Via optional Hanon LabSuite software with HL7 and ASTM E1384-compliant data export; direct LIMS push requires middleware configuration.
What safety certifications does the K9840 hold?
CE marking (2014/30/EU EMC Directive and 2014/35/EU Low Voltage Directive); conforms to IEC 61010-1:2010 for laboratory electrical equipment safety.
Is preventive maintenance documentation available in English?
Yes—comprehensive English-language service manuals, calibration SOPs, and spare parts catalogs are provided with each unit.
How is reagent consumption monitored and optimized?
Integrated gravimetric and volumetric sensors track NaOH, boric acid, and rinse water usage per run; software calculates average consumption and triggers low-level alerts.
