40-position automatic sample injection fully automatic Kjeldahl nitrogen analyzer--8900

The 8900 is a fully automatic Kjeldahl nitrogen analyzer developed based on the classic Kjeldahl method. Its analysis method utilizes titration and endpoint determination by colorimetry, complying with the GB/T 33862-2017 Fully (Semi-)Automatic Kjeldahl Nitrogen Analyzer manufacturing standard and related international standards. Equipped with a 40-position automatic sample injection system, it enables unattended, fully automated analysis. It also features automatic digestion waste discharge and a refrigeration system that eliminates the need for tap water.

Product Features:

Note! Items marked with ★ indicate our company's unique technologies or features.

1. ★ 40-position automatic sample introduction system meets the needs of large-scale sample analysis.

2. ★ Sample digestion racks can be loaded directly into the instrument for convenient and quick operation. Compared to disk-type sample introduction, this eliminates the tedious task of transferring test tubes.

3. The operating system features a 10-inch color touchscreen interface, offering easy-to-learn and user-friendly human-computer interaction.

4. Three-level permission management, electronic records, electronic labels, and an operation traceability system meet relevant certification requirements.

5. ★ Two sample introduction modes: "continuous" and "instantaneous."

6. The titration system utilizes a coaxial R, G, and B tri-color light source and sensor, providing a wide color range and high accuracy. Automatic adjustment of the R, G, and B light intensity to accommodate samples of varying concentrations.

7. Titration speed adjustable from 0.05 ml/s to 1.0 ml/s, with a minimum titration volume of 0.2 μl/step.

8. A high-precision titration system featuring a German ILS 25 mL syringe and a 0.6 mm lead linear motor provides high accuracy and stability.

9. An internal standard for titrant concentration eliminates systematic errors resulting from differences between human and instrument judgment, resulting in high accuracy and convenience.

10. Fine-tuning of titration parameters to accommodate different user and sample requirements.

11. The exposed titration beaker allows for easy observation of the titration process and cleaning of the beaker.

12. Titration-while-distillation mode saves analysis time and reduces inefficient distillation.

13. Distillation time adjustable from 10 seconds to 9,990 seconds.

14. Steam flow adjustable from 1% to 100% to accommodate samples of varying concentrations.

15. The PID automatic steam control system provides a stable steam flow, ensuring effective sample separation and system safety.

16. The polymer sodium and calcium glass ammonia separator is suitable for alkaline working conditions.

17. Automatic digestive tract wastewater discharge reduces worker workload.

18. Data storage of up to 1 million records for user review.

19. ★ The instrument features a built-in protein coefficient lookup table for user access, query, and system calculations.

20. Data interfaces: USB, LAN, RS232, CAN, Wi-Fi, Ethernet, electronic balance, refrigeration system, reagent tank level sensor, and more.

21. Upgradable or optional computer operating system enables computer operation, automatic test report generation, and other network services.

22. ★ The unique "automatic upload of sample weighing data" eliminates the need to record and enter sample weights individually, reducing input errors and improving work efficiency.

23. The system automatically shuts down after 60 minutes of unattended operation, ensuring energy efficiency, safety, and peace of mind.

24. Safety door and alarm system ensure personal safety.

25. A digestive tract occlusion protection system prevents injury from reagents and steam.

26. Steam system water shortage alarm and shutdown to prevent accidents.

27. Steam boiler overtemperature alarm and shutdown to prevent accidents.

28. Steam overpressure alarm and shutdown to prevent accidents.

29. Sample overtemperature alarm and shutdown to prevent sample temperature increases that could affect analytical data.

30. Reagent barrel and titration flask low level alarm.

31. Cooling water flow monitoring to prevent insufficient water flow from causing sample loss and impacting analytical results.

32. Delayed alkali addition to reduce the potential for strong reactions during alkali addition and prevent tube bursts.

33. Alarm switch for inoperative motion system when the sample injection system door is not open to prevent the test tube rack from moving out and impacting the door.

34. Test tube and test tube rack detection and alarm.

35. Test tube stuck shutdown and alarm.

8900 Technical Specifications

1. Analysis Range: 0.1–240 mg N

2. Precision (RSD): ≤0.5%

3. Recovery: 99–101% (±1%)

4. Minimum Titration Volume: 0.2 μL/step

5. Titration Rate: 0.05–1.0 ml/s (adjustable)

6. Autosampler Positions: 40

7. Distillation Time: 10–9990 seconds (adjustable)

8. Sample Analysis Time: 4–8 minutes (cooling water temperature 18°C)

9. Titrant Concentration Range: 0.01–5 mol/L

10. Titrant Concentration Input Method: Manual Entry/Instrument Internal Standard

11. Titration Mode: Standard/Distillation

12. Titration Cell Capacity: 300 ml

13. Touchscreen: 10-inch Color LCD

14. Data Storage Capacity: 1 million data sets

15. Printer: 5.7cm thermal printer with automatic paper cutter

16. Communication Interface: 232/Ethernet/Computer/Electronic Balance/Cooling Water/Reagent Tank Level

17. Digestion Tube Drain Mode: Manual/Automatic (5-99 seconds)

18. Delayed Analysis: Response Time: 0-2 hours

19. Steam Flow Adjustment: 40%-100%

20. Safety Alkali Dosing Mode: 0-99 seconds

21. Automatic Shutoff Time: 60 minutes

22. Refrigerant: R22

23. Refrigeration Cycle Power: 850W

24. Operating Voltage: AC220V/50Hz

8900 Basic Configuration:

· Main Unit 1 · Reagent Tanks 3 · Automatic Sampling System 1 · Waste Liquid Collection Tank 1 · 1L Titration Solution Bottle 1

· Printer Paper 8 Rolls · Reagent Tubing 4 · Cooling Water Inlet and Outlet Pipes 1 · Power Cord 1 · Refrigeration Circulation System 1

· M19 Open Handle 1 · Communication Cables 2 · Digestive Tube Holders 2 · Digestive Tubes 20