Fully Automatic Kjeldahl Nitrogen Analyzer JK9870B, 0.1-200 mg N (CAT#: STEM-AL2-4122-ZJF)

The JK9870B fully automatic Kjeldahl nitrogen analyzer is an analytical instrument for determining nitrogen in digested samples. It is intended for Kjeldahl-based nitrogen analysis in laboratory testing workflows. The system manages reagent handling and steam distillation as part of the analytical sequence. Sample ammonia is separated during distillation and transferred to the receiving stage for measurement or titration. Integrated control functions coordinate the analytical steps and reduce manual intervention. The fluid path is configured for repeated exposure to acidic and alkaline reagents used in Kjeldahl analysis. Protection functions monitor operating conditions and help prevent unsafe or incomplete analytical cycles. The instrument is suited to repetitive nitrogen testing where standardized operation and data consistency are required.

Analysis Range: 0.1-200 mg N
Precision (RSD): <=0.5%
Recovery:>=99.5%
Titration Resolution: 0.75 µL/step
Sample Capacity: Solid <=6 g
Liquid <=20 mL
Cooling Water Consumption: 1.2-3 L/min
Sample Analysis Time: 4-7 min
Analysis Modes: Automatic/manual
Nitrate Fertilizer Mode Waiting Time: 0-2 h
Sample Blank Correction: Automatic
Data Storage: 4 GB
Titration Pump Verification: 15 mL per test, ±5‰

Automatic or manual titrant-concentration calibration
Titration-volume verification
Dual analytical modes for amino and nitro sample types
Modular internal structure
Color-coded tubing identification
Corrosion-resistant fluid-path tubing
Cooling-circulator intelligent interface
Automatic digestion-tube waste discharge