Since the establishment of Shanghai Xinzhuang Company, its products and services have gained widespread recognition from customers, building a strong and reputable brand image. The company is committed to the business philosophy of "integrity, professionalism, innovation, and growth," ensuring that every customer receives meticulous and reliable service.
**Scope of Application**
The Kjeldahl instrument utilizes the Kjeldahl method to analyze various compounds such as ammonia, protein nitrogen, phenol, volatile fatty acids, cyanide, sulfur dioxide, and ethanol in samples like grains, food, feed, water, soil, sludge, sediments, and chemicals. Known for its excellent cost-performance ratio, this device only requires manual operation during the titration phase, making it ideal for routine testing in laboratories and inspection agencies. It is widely used in determining nitrogen or protein content in food, crops, seeds, soil, and fertilizers.
**Working Principle**
The organic compound is heated with sulfuric acid, converting the nitrogen into ammonium sulfate. Potassium sulfate is often added to raise the boiling point of the mixture. When a small amount of sodium hydroxide is introduced, the solution becomes clear and transparent (initially dark), signaling the end of the digestion process. Ammonia is then distilled and absorbed in boric acid. The total ammonia is determined via back titration: excess acid is neutralized by sodium carbonate, and the results are multiplied by a conversion factor to obtain the final nitrogen content.
**Kjeldahl Application Features**
- One-button operation for quick and easy programming
- Multilingual menu options available
- Built-in optical and acoustic fault alarm system
- Safety door switch and automatic power generation control
- Adjustable steam output from 40% to 100%
- Measurement range: 0.1–200 mg
- Nitrogen recovery rate of 99.5%
- Repeatability within ±1%
- Distillation between standby operations
- Independent cleaning program
- Automatic and manual sodium hydroxide addition
- RS232 interface for data transfer
- Condensate consumption: 5 L/min
**Key Features of the Kjeldahl Analyzer**
1. **Dual Operation Modes**: The analyzer supports both manual and automatic modes, allowing users to customize settings based on their specific needs. In automatic mode, alkali, boric acid, distillation, and absorption processes can be programmed. In manual mode, users can control each step individually.
2. **User-Friendly Interface**: A large dot-matrix LCD screen with full Chinese menus and touch buttons ensures ease of use.
3. **Automated Functions**: Includes automatic distillation, watering, water level control, and low water pressure alarms.
4. **Comprehensive Safety Measures**: Equipped with a digestive tube safety door and steam generator water shortage alarm.
5. **Program Storage**: Users can save their operating programs for future use.
Shanghai Xinzhuang Instrument Co., Ltd. specializes in developing and producing solid-phase extraction devices under the Xinzhuang brand. These devices are energy-efficient, environmentally friendly, and designed with high-quality materials and precise craftsmanship. Since its founding, the company has focused on continuous product development, upgrades, and innovation, consistently introducing intelligent instruments known for their stability and user-friendliness. To better serve its clients, the company also employs professional application engineers who are always ready to assist with any questions.
For more information, visit [http://](http://)
One Compartment
Second, the advantages of a single grid paper packaging box
1. Save costs
Single-sided paper packaging box has obvious advantages in production cost. Because its material is mainly paper, the source is wide and the price is relatively low, so the production cost is relatively low. In addition, the manufacturing process of the single carton is relatively simple, and the production efficiency is high, which further reduces the cost. For catering enterprises and takeout platforms, the use of single-sided paper packaging boxes can effectively reduce packaging costs and improve profitability.
2. Environmentally friendly and lightweight
Environmental protection is another significant advantage of the box. Paper materials come from renewable resources, are highly degradable, and have less impact on the environment after waste. Compared with plastics, metals and other materials that are difficult to degrade, the single-grid paper packaging box has obvious advantages in environmental protection. In addition, the light texture of the paper material makes the single-grid paper packaging box have better portability. Consumers can easily take packaged food home or to the office, while also reducing delivery costs for merchants.
3. Easy to store and carry
The design of the single-grid paper packing box fully considers the storage and carrying needs of users. It is moderate in size, easy to stack, and easy to store in the refrigerator or cabinet. At the same time, the lid of the single-grid paper packing box is tightly designed, which can effectively prevent food from being scattered or spilled during storage and carrying. For delivery platforms, single-sided paper boxes also ensure that food remains intact and hygienic during delivery. In addition, because the paper material has good thermal insulation performance, the single box can also maintain the temperature of the food to a certain extent and improve the dining experience.
Single paper packing box, oil and water proof, easy to operate
EVER GREEN(ZHEJIANG)NEW MATERIAL CO., LTD / KUNSHAN GREENPACK CO.,LTD , https://www.changjingpack.com