- Product Details
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Quick Details
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Brand Name:
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Bonnin Instrument
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Model Number:
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KN2200F
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Equipment name:
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Kjeldahl Method Nitrogen Tester
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Heating method:
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Infrared heating and high-purity graphite conduction
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Digestion tube capacity:
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300ml
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DSC display:
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0.001 mW
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Certification:
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ISO, CE
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Power supply:
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110V/220V 50Hz
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Warranty Time:
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12 months
Quick Details
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Warranty:
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1 Year
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Power:
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Electronic
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Place of Origin:
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Hubei, China
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Brand Name:
-
Bonnin Instrument
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Model Number:
-
KN2200F
-
Equipment name:
-
Kjeldahl Method Nitrogen Tester
-
Heating method:
-
Infrared heating and high-purity graphite conduction
-
Digestion tube capacity:
-
300ml
-
DSC display:
-
0.001 mW
-
Certification:
-
ISO, CE
-
Power supply:
-
110V/220V 50Hz
-
Warranty Time:
-
12 months
The fully automated Kjeldahl nitrogen analyzer consists of four basic components: (1) distillation unit; (2) titration device; (3) detection device; and (4) waste disposal device.
Characteristics
1. Automatic completion of distillation, titration,calculation, printing, waste discharge;
2. Built-in colorimetric titration device;
3. Two steam models, can adjust solutions adding sequence, for distillation and absorption special samples;
4. Built-in printer, USB and series port for data outlet,
5. Samples’ methods can be edited and store;
6. Solutions adding are quantified;
7. Multi protection, safety door, tube position, cooling water testing, etc;
8. Self-trouble shooting functions for valves, pumps and sensors;
9. Tube and pips automatic emptying;
Technical datas
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KN2200F Fully Automated Kjeldahl Nitrogen Analyzer |
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Measure range |
0.1mg – 200mg |
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Analysis time |
5 – 10min |
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Recovery |
≥99.5% |
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Samples available |
Solid ≤ 5g; Liquid ≤20ml |
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Burette accurate |
1.0μL/ step |
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Reproducibility |
±0.5% |
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Functions List |
Comparison |
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Variable steam generator |
YES |
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Cooling water pressure monitor |
YES |
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Cooling water temperature monitor |
YES |
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Automatic alkali solution adding |
YES |
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Automatic dilute water |
YES |
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Auto receiver solution adding |
YES |
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Tube emptying |
YES |
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Removable drain tray |
YES |
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Safety door |
YES |
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Tube on position sensor |
YES |
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Tube replacement sensor |
YES |
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Colorimetric titration device |
YES |
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Results calculation |
YES |
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Result and data storing |
YES |
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Built-in printer |
YES |
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Automatic washing tube and pips |
YES |
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Trouble shooting self-detecting functions |
YES |
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1.1 Weighing
The milk sample needs to be mixed and sampled. Because the milk sample is easy to float up and is directly sampled from the upper layer without mixing, the measurement result will be low. The milk powder sample is evenly mixed and weighed with a weighing paper and sent to the bottom of the digestive tract with tweezers. The sample remaining on the tube wall due to improper operation is flushed into the bottom of the digestive tube with sulfuric acid when sulfuric acid is added. If it remains on the pipe wall without flushing with sulfuric acid, the measurement result will be lowered.
1.2 Digestion
In the process of adding acid, the influence of the composition of the sample on the amount of acid consumed should be considered. The amount of acid is small, the sample is incompletely digested, and the measurement result is low; the amount of acid is large, and the acid is excessively mixed with the alkali in the process of the machine, and the free amine cannot be distilled out, which seriously affects the measurement result.
During digestion, pre-digestion was first carried out at 220 ° C for 1 hour and then the temperature was raised to 420 ° C. The purpose of pre-digestion is to allow the sample to react slowly with sulfuric acid. Without pre-digestion, concentrated sulfuric acid will react violently with the sample at high temperature, causing carbonization, and the measurement result will be low. The particles caused by carbonization will also block the pipeline during the waste discharge process, resulting in the instrument not working properly.
