The LNB Kjeldahl Analyzer, developed by Shanghai Xinzhuang Instrument Co., Ltd., is a cutting-edge, energy-efficient, and environmentally friendly nitrogen detection system that stands at the forefront of domestic technology. Known for its reliability and affordability, it's ideal for laboratories seeking precision and performance.
**Maintenance and Care Guide for the LNB Kjeldahl Analyzer:**
1. **Distillation Unit Maintenance**
After each sample analysis, return to the debugging interface and select the distillation function. The device will automatically run for approximately 7 minutes before stopping. Once complete, drain the liquid from the receiving cup and clean the distillation unit thoroughly. Ensure the titration device is also cleaned. Remove the digestion tube, pour out any waste liquid, and wipe the safety door and drip tray to eliminate any residual alkali left from the measurement process.
2. **Replacing Standard Acid Solution**
When switching between different concentrations of standard acid, it's essential to flush out the old solution from the titrator. Navigate to the titration function in the debugging menu and perform a 5–6 minute titration. This will fully replace the old acid with the new one. Don’t forget to drain the standard acid from the receiving cup after the process.
3. **Cleaning Waste Disposal Equipment**
Regular cleaning of the waste disposal equipment is crucial. If left uncleaned for long periods, blockages can occur. To clean manually, prepare 25 ml of acetic acid solution and 5 ml of water. Perform a manual distillation for about 30 minutes, allowing the acetic acid to evaporate and remove any remaining alkali residue from the inner walls of the waste disposal device.
4. **Important Precautions**
Always check the recovery rate after replacing the standard titration acid or receiving liquid, or following any instrument repair. Use ammonium sulfate for recovery testing, ensuring the recovery rate stays within 99.5% to 100.5%. This confirms the analyzer is functioning correctly and ready for accurate sample measurements.
5. **Alkali Pipeline Maintenance**
If the alkali pipeline isn't used for an extended period, it may crystallize and become clogged due to its corrosive nature. After each test, replace the alkali solution in the tank with distilled water. Then, use the debugging interface to repeatedly inject and flush the alkali line, ensuring all residues are removed.
Shanghai Xinzhuang Instrument Co., Ltd. is a leading manufacturer specializing in the research, development, production, and sales of low-temperature experimental equipment and ultrasonic devices. With expert temperature control engineers and advanced manufacturing facilities, the company ensures high-quality products through a refined production process. Their commitment to safety, stability, and cost-effectiveness makes them a trusted partner for laboratories worldwide. By offering practical, durable, and space-saving solutions, they aim to enhance the efficiency of your experiments and support your scientific progress. We continuously strive to provide reliable, high-performance equipment to make your lab work more convenient and effective.
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