Scope of application
Kjeldahl instrument uses Kjeldahl method to detect ammonia, protein nitrogen, phenol, volatile fatty acids, cyanide, sulfur dioxide, ethanol, etc. in grains, food, feed, water, soil, sludge, sediments and chemicals. . It has a very good cost performance, and only the titration process requires manual operation, which is very suitable for routine testing in laboratories and inspection agencies. Widely used in the analysis of nitrogen or protein content of food, crops, seeds, soil, fertilizer and other samples.
Principle: The organic compound is co-heated with sulfuric acid to convert the nitrogen therein to ammonium sulfate. In this step, potassium sulfate is often added to the mixture to increase the boiling point of the intermediate product. The end of the analysis process of the sample is well judged because the mixture will become colorless and transparent (very dark at the beginning) by adding a small amount of sodium hydroxide to the resulting solution and then distilling. This step converts the ammonium salt to ammonia. The total ammonia amount (determined directly by the nitrogen content of the sample) is determined by the back titration method: the end of the condenser tube is immersed in the boric acid solution. Ammonia reacts with the acid, while excess acid uses sodium carbonate under the direction of methyl orange. The results obtained by titration are multiplied by a specific conversion factor to obtain the result.
Kjeldahl application
The operation is extremely simple and can be quickly programmed with one-button operation. There are different language menus to choose from. 2. Equipped with optical and acoustic fault alarm system. The digestive tract is not in place or placed incorrectly, the safety door is not closed, the instrument does not start, the acid, alkali, and diluent are missing. The host can quickly detect and suspend the experiment, and the automatic alarm prompts, extremely convenient, safe and reliable. 3. Door contact safety switch. 4. Programmable reaction and distillation time. 5. Automatic steam power generation. Steam power generation can be adjusted from 40% to 100%. 6. Measurement range: 0.1-200mg7. Nitrogen recovery rate 99.5% 8. Repeatability ± 1%
9. Distill between standby operations. 10. Independent cleaning program. 11. Automatic and manual addition of sodium hydroxide. 12. RS232 interface. 13. Condensate consumption: 5 l / min
Kjeldahl analyzer features:
1. Kjeldahl nitrogen analyzer, using microcomputer for process control, including manual mode and automatic mode, can be set and switched according to your needs:
In the automatic mode: the addition of alkali, boric acid, distillation, ammonia absorption process, the volume of boric acid and alkali plus the time of distillation and absorption can be set by themselves.
In the manual mode: the three processes of adding boron, adding alkali and distilling can be manually operated, and the volume and time are controlled by themselves to meet the needs of professional users.
2. Large-screen dot-matrix liquid crystal display, full Chinese menu, touch button, easy to operate.
3. Automatic distillation control, automatic watering, automatic water level control, automatic water stop and water pressure low alarm.
4. Various safety protection: digestive tube safety door device, steam generator water shortage alarm.
The main products of Shanghai Xinzhuang Instrument Co., Ltd. are small spray dryer, ultrasonic cell pulverizer, solid phase extraction device, constant temperature shaker, photochemical reactor, carbon dioxide incubator, experimental spray dryer and other laboratory instruments. The company's employees have excellent professional quality and experienced technical service team. We have professional senior engineers such as design, development, manufacturing, installation and commissioning of the whole plant turnkey project to serve you. Welcome new and old customers to inquire!
Http://
1. NO RUST & BPA-FREE: Rust Resistant, Anti-acid and Alkali Material, Non-toxic, No Contamination, No Metal smell, Easy to Use. will retain its original sharpness up to 15 times longer than steel blades. You will never need sharpening any more!
2. NO OXIDATION: when cutting with these ceramic chef knifes. Keep your meat & food fresh for a longer period of time.The beveled doubled-sided, cutting edge will thinly slice anything, becoming a favorite knife in the kitchen
3. Each kitchen cearamic knife with knife cover, it is very safe and store.
4. Razor-sharp blade with comfortable handle.
5. Not for Cutting Bones, Coconut Shells or Super Hard objects.Do not use Ceramic Knife for chopping bone, prying, striking and it can dish-washing .
Kyocera Knife Block,Ceramic Sharpener,Kyocera Chef Knife
BOHAO ENTERPRISE CO., LTD , https://www.yj-bohao.com