Kjeldahl nitrogen analyzer QW-KDN

1.summary:

KDNKjeldahl apparatusIt is an automatic nitrogen distillation system designed based on the classic Kjeldahl nitrogen determination method. The main workflow of the instrument includes: automatic water addition (including automatic water level detection function), automatic alkali addition (button control), manual acid addition (manual configuration), automatic distillation (button control), etc. The instrument is easy to operate; Safe and reliable use; Save time and effort; Suitable for analysis, teaching, and research in industries such as grain and oil testing, feed analysis, plant nutrient testing, soil and fertilizer testing, medicine, and chemical engineering, it is an ideal tool for operators and users.

2.Working principle (Kjeldahl principle):

Proteins are nitrogen-containing organic compounds. Food, sulfuric acid, and catalyst are heated and digested together to decompose proteins. The decomposed ammonia combines with sulfuric acid to form ammonium sulfate. Then, under the action of alkaline distillation, ammonia is freed, and the released ammonia gas and water vapor are condensed together through a condenser and enter a conical flask containing boric acid. After being absorbed by boric acid, titrate with standard solutions of sulfuric acid or hydrochloric acid. Multiply the consumption of acid by a conversion factor to obtain the protein content.

3.Operation steps:

Sampling → Digestion → Distillation → Titration → Calculation

4.The complete set of instruments consists of:

Including digestion furnace (optional by our company)KDN-XHL8、 KND-XHL4Composed of a digestion furnace model and a KDN series Kjeldahl nitrogen analyzer distiller.

Technical Specifications

1Testing varieties: grains, feed, food, dairy products, beverages, soil, water, drugs, sediments, and chemicals, etc.

2．Working mode: semi-automatic.

3Measurement quantity: Single continuous distillation measurement is used.

4Measurement range: Nitrogen content in0.1～200mgN(milligram of nitrogen)

(Nitrogen content)0.1%～99%）

5Recovery rate:≥99%(Relative error, including digestion process)

6Repetition rate: relative standard deviation ＜ ±1%

7Working hours: Distillation time5-15minute.

(Depending on the sample and nitrogen content)

8Rated voltage:220V/50Hz.

9. Rated power800W

10．冷却水消耗：3-4L/minThe water temperature is below25Degree)

Complete List

1.Nitrogen analyzer host 1Taiwan

2.power cord 1root

3.silicone tube（F4） 1rice

4.Silicone tube（Φ6） 4rice

5.Product Manual 1copy

6.Certificate of Conformity/Warranty Card 1set