Automatic Kjeldahl Nitrogen Analyzer: Key to Accurate Protein and Nitrogen Analysis

Protein content is a core indicator for quality control in fields such as food and feed. The automatic Kjeldahl nitrogen analyzer is based on the classical Kjeldahl nitrogen determination principle, which realizes the full process automation from sample addition to result output, providing efficient and accurate solutions for nitrogen and protein analysis.

The importance of automatic Kjeldahl nitrogen analyzer

The protein content is directly related to the nutritional value of food, the efficacy of feed, and the quality level of agricultural products. The traditional Kjeldahl nitrogen determination method is cumbersome, time-consuming, and relies on manual experience, making it difficult to meet the needs of modern industrial testing. The automatic Kjeldahl nitrogen analyzer, designed with automation and intelligence, reduces detection time to 3-9 minutes per sample and minimizes human error, making it an important tool in the field of quality control.

Technical principles and working mechanisms

Principle of Kjeldahl nitrogen determination method

The instrument is based on the chemical reaction process of Kjeldahl nitrogen determination method:

1. Digestion: The sample is heated and decomposed with sulfuric acid, and nitrogen is converted into ammonium sulfate;

2. Distillation: Ammonium sulfate reacts with alkali to produce ammonia gas, which is separated by steam distillation;

3. Absorption: Ammonia gas is absorbed by boric acid solution to form ammonium salt;

4. Titration: Titrate with standard acid, determine the endpoint through a color sensor, and calculate the nitrogen content.

Automated Process

• Automatic liquid addition: Accurately add reagents such as alkali, boric acid, diluent, etc;

Dynamic titration: simultaneous distillation and titration, saving 30% -50% time compared to static titration;

• Automatic cleaning: After titration is completed, the reaction cup is automatically emptied and cleaned to avoid cross contamination.

Intelligent monitoring system

• Water level monitoring: evaporation furnace anti dry burning protection;

Flow rate monitoring: automatic alarm when the condensate flow rate is low;

• Temperature control: Real time monitoring of condenser tube temperature to ensure distillation efficiency.

Technical advantages and performance characteristics

Efficient and Accurate

Quick detection: Complete individual sample analysis in 3-9 minutes and support batch processing;

High precision: repeatability parallelism ≤ 0.5%, recovery rate 99% -101%;

Wide detection range: 0.1-240mg nitrogen, compatible with solid (≤ 8g) and liquid (≤ 30ml) samples.

Intelligence and Reliability

Android system: 10.1-inch touch screen, intuitive operation;

Multiple protections: real-time monitoring of water level, temperature, and pressure to ensure safe operation;

Data management: Supports storing 5 million pieces of data and exporting results in Excel format.

Energy conservation and environmental protection

Intelligent water-saving: Program controlled condensate switch, reducing consumption (1.5L/min);

Corrosion resistant design: Key components are made of corrosion-resistant materials to extend their service life.

The automatic Kjeldahl nitrogen analyzer solves the pain points of low efficiency, large errors, and complex operation in traditional nitrogen content detection through automation, intelligence, and high-precision design. Its fast, reliable, and easy-to-use characteristics make it an important analytical tool for quality control in fields such as food, feed, and agriculture.