Kjeldahl nitrogen analyzer

Introduction to Kjeldahl nitrogen analyzer

The Kjeldahl nitrogen analyzer is an automated instrument used to determine nitrogen and protein content based on the Kjeldahl nitrogen method. It can be widely used for nitrogen and protein analysis in food processing, feed production, tobacco, animal husbandry, soil and fertilizer, environmental monitoring, medicine, agriculture, scientific research, teaching and other fields.

According to the principle of Kjeldahl nitrogen determination method, the instrument automatically adds reagents, distills, absorbs, titrates and outputs test results for the digested sample, which can be nitrogen content or converted to protein content. The specific reaction steps are as follows: ammonium sulfate produced after sample digestion reacts with alkali to produce ammonia gas. The ammonia gas and steam are condensed together through a condenser and collected in an absorption solution containing boric acid. At the same time, the indicator in the absorption solution changes color, and then the instrument performs automatic titration. The color sensor can automatically determine the titration endpoint, and the nitrogen content of the sample can be calculated based on the consumption of standard titration acid.

All steps of the Kjeldahl nitrogen analyzer are automatically completed according to the program. This provides great convenience for testing personnel in nitrogen and protein determination. It has the characteristics of safe and reliable use, simple operation, and time-saving and labor-saving.

Advantages and Characteristics

(1) 10.1-inch touch screen, Android 10 system.

(2) Automatically complete the liquid addition steps such as adding alkali, adding boric acid, adding diluent, and adding distilled water; Automatically complete distillation, absorption, titration and other operational steps; After titration, the reaction cup is automatically emptied and cleaned.

(3) Protection functions include monitoring the water level of the evaporator, preventing dry burning, monitoring the flow rate of condensate water, and detecting the temperature of the condenser tube.

(4) High capacity 16GB storage capacity, with a storage capacity of 5 million test results.

(5) The test result is an Excel spreadsheet, which can be directly copied to a USB drive.

(6) The test results can be printed and uploaded in batches.

(7) High speed thermal printer, capable of automatically printing inspection reports upon completion of testing.

(8) It has WiFi networking function, and the test results can be directly uploaded to the platform.

(9) Program controls the opening and closing of condensate water to save water usage.

(10) Condensed water flow rate monitoring, low flow rate alarm.

(11) Multiple protections such as evaporator water level, temperature, pressure, etc.

(12) Adopting highly corrosion-resistant components.

Instrument parameters

(1) Measurement range: 0.1~240.0mg nitrogen

(2) Sample weight: Solid ≤ 8.0g, Liquid ≤ 30.0ml

(3) Measurement accuracy: relative difference ≤ 1%

(4) Repeatability: Parallel deviation ≤ 0.5%

(5) Titration accuracy: 1.0uL/step

(6) Titration method: Static titration

(7) Condensed water consumption: 1.5L/min

(8) Recovery rate: 99%~101%

(9) Measurement speed: 3-9min/sample

(10) Power: ≤ 1500W

(11) Temperature: 10-35 ℃

(12) Humidity: Relative humidity not exceeding 85%

(13) Voltage: 220V 50HZ

(14) Bare weight: 16KG

(15) Dimensions: 405mm x 465mm x 690mm (length x width x height)

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