SKD-5000 fully automatic Kjeldahl nitrogen analyzer - soil cation exchange meter

The fully automatic Kjeldahl nitrogen analyzer (protein analyzer) is an automatic intelligent detection instrument designed based on the classic Kjeldahl nitrogen determination principle. It is widely used to detect the overall content of ammonia nitrogen and protein nitrogen in grain, oil, food, dairy products, beverages, feed, soil, fertilizers, drugs, sediments, and chemical products. It is an important physical and chemical analysis instrument for product quality testing

The fully automatic Kjeldahl nitrogen analyzer (protein analyzer) is an automatic intelligent detection instrument designed based on the classic Kjeldahl nitrogen determination principle. It is widely used to detect the overall content of ammonia nitrogen and protein nitrogen in grain, oil, food, dairy products, beverages, feed, soil, fertilizers, drugs, sediments, and chemical products. It is an important physical and chemical analysis instrument for product quality testing.The cation exchange performance of soil refers to the exchange interaction between cations in soil solution and fixed cations in soil, which is determined by the surface properties of soil colloids. Soil colloids are complex organic mineral complexes formed by the combination of clay minerals, humic acids, and their interactions in soil. The cations they absorb include potassium, sodium, calcium, magnesium, ammonium, hydrogen, aluminum, and others. The analysis of soil cation exchange performance includes cation exchange capacity, exchangeable cations, and base saturation.

Automatic kieldahl apparatusSoil cation exchange capacity detectorUsing a brand new long-life design, advanced microcomputer intelligent control, LCD color touch screen operation, Chinese menu interface for human-machine dialogue operation, automatic completion of a series of standardized processes such as acid addition, alkali addition, dilution solution addition, distillation, titration, cleaning, storage, printing, etc. The dripping is judged by the international standard color method (color sensor), replacing the traditional complex electrode potential methodsingle wavelengthThe photoelectric colorimetric instrument is easy to operate, with accurate data and stable performance. It has multiple independent intellectual property patents, and some technologies and structures are pioneering in China and have reached international standards.

Instrument housing：Using ABS engineering plastic to prevent corrosion by sulfuric acid and ensure instrument insulation.

It has the function of protecting samples from condensed water interruption

The titration cup is in an open state and is not affected by external light.
Automatic detection of cooling water flow and pressure,Lack of alkali, boric acid, diluent, and distilled water prompts.

Real time temperature detection and control of distillation cups.
Real time detection and prompt function for whether the protective door is closed;

Automatic cleaning of titration cups and pipelines.
Manual and automatic dual modes can be switched freely, and the entire testing process is tracked and displayed in real-time,
The distiller adopts dual level control,Using mathematical models to discover that the distillation cup has entered a dry burning state.eliminateDistillation cupThe risk of dry burning.

Distillation methodDouble distillation mode：

1. Measurement range: 01-210mg nitrogen (0.07cmol/KG-14mol/KG)

2. Distillation time:3-9Minutes/Sample
3. Distillation capacity:15~30Ml/minuteadjustable

4.pumpTitration accuracy:RSD<0.002ul/step

6Reproducibility: RSD<0.5%（10-150mgN）、 RSD〈1.0%（3-10mgN）

7. Linear range: The RSD of the sample in the digestive tract is less than 1.5% (nitrogen content 3-150mgN, As an acceptance indicator)

8Recovery rate:>99.5% (As an acceptance indicator)

9.Reagent pump volume: 0-150ml, 1ml/grade

10.Delay time: 0-1800s(Easy to detect nitrate nitrogen)