Main application: for protein, total nitrogen analysis and other volatile components distillation analysis of food, agricultural products, aquatic products, soil and plasticizer samples.
Functional parameters:
★1 、Adopt the national standard Kjeldahl nitrogen determination method: concentrated sulfuric acid environmental disintegration sample, alkaline environment steam distillation, boric acid absorption, indicator titration endpoint color determination method;
2, detection range: 0.1-250mg nitrogen; recovery ≥ 99.5%; repeatability error (RSD): ≤ 0.5%; determination of sample weight: solid ≤ 5g liquid ≤ 20ml;
Fully automated detection process: acid addition, alkali addition, distillation, titration, digestion tube emptying, exhaust cleaning, data storage, result calculation and printout are completed fully automatically without manual intervention; manual control can also be used after a pause;
Distillation system parameters
★4、 The original sample dilution and alkali addition method can be set arbitrarily according to the user's sample in different batches, times and times for alkali addition and dilution links, which can prevent the occurrence of sample boiling explosion to the maximum extent and improve the determination accuracy;
★5, the original alkali pump anti-crystallization technology, completely eliminate the problem of alkali pump crystallization, to maximize the reliability of the instrument;
6、Steam pre-addition technology that is immediately after the addition of diluted water in the digestion solution into the steam, through the stirring effect of steam so that the concentrated sulfuric acid in the digestion solution is fully diluted, reduce the reaction strength when the subsequent addition of concentrated alkali, improve the distillation effect; or the solid crystalline digestion solution for thermal purging, gas pedal dissolution process, reduce the reaction strength to ensure accurate test results. And steam added intensity in the dilution stage, the addition of alkali stage arbitrarily adjustable to ensure the maximum degree of accuracy of the measurement sample;
7, steam flow adjustable, 1%-100% arbitrary optional, better to achieve the effect of distillation, to ensure the accuracy of the experiment;
★8, double distillation mode: steam pre-add distillation mode and delayed distillation mode can be switched at will;
9, distillate temperature detection over-temperature alarm and automatically reduce the distillation power level to ensure the accuracy of the measurement results
prevent accidental operation resulting in nitrogen loss, to ensure accurate and reliable analysis results;
10, distillation generator with pressure protection, overheating protection, liquid level detection, anti-dry burning and other multi-protection features to ensure the safety of the operator and testing;
★11、Distillation time: 0-9999min continuously adjustable;
Titration system parameters
★12、Endpoint color learning learning function, the user can identify and adjust the color that is considered to be the endpoint;
★13, end-point color user fine-tuning technology to ensure the adaptability of accurate testing, more humane care
14, using dual mode titration, the combination of coarse and fine titration will ensure a high degree of accuracy of the results
15, external titration cup and with observation window, the experimental process can be seen in real time;
16, UI built-in user login, user rights can be set to ensure that the instrument test controllable and traceable test results;
★17、Using 10-inch 16bit true color touch LCD, with SmartOneKey operation interface is easy to use, truly realize one key test;
★18、Interface: USB, RS232, the user can connect with the computer through either one, simplifying the configuration and operation process, and the subsequent processing of results;
19, delicate, reasonable internal structure design, to ensure that dry, wet, thermal and electrical separation, to avoid interference, to ensure stable operation of the instrument and extend the service life;
20, the whole machine working silent design, the machine working noise to a minimum;
21, all pipelines and action components are made of anti-corrosion materials and finely crafted;
22、Safety door detection, nitrogen fixing tube in position detection, optional solution barrel level detection, receiving cup overflow detection;
★23, optional nitrate nitrogen and high state nitrogen module
Performance indicators:
★1、Measurement range: 0.1-250mgN (milligram nitrogen)
2、Measurement speed: conventional 3-8min/sample
Nitrate nitrogen 10-18min/sample
High nitrogen 4-8min/sample
★3、Titration accuracy: coarse titration 1μl/step fine titration 0.016μl/step
4、Reproducibility：0.5% relative error
5、Recovery: more than 99.5% (1-250mgN)
6、Automatic titration: in line with the AOAC standard color endpoint judgment method
6、Data storage: >100,000 sets
7, program storage: > 10000
8, distillation time length: 1-9999min
9, steam power level: 1%-100%
10, the measurement of sample volume: solid ≤ 5g liquid ≤ 25ml
11, circulation water flow: 1.5 liters / min
12, USB standard: USB1.0, USB2.0
13、Power: 1800W
14, working voltage: AC220V 50Hz
15, volume: (W) 500mm × (L) 450mm × (H) 750mm
16、Weight: 35KG
Third, the scope of application
KN580 Kjeldahl nitrogen tester is widely used in food processing, cereals, feed, water, soil, pharmaceutical, plasticizer, animal husbandry, soil fertilizer, environmental monitoring, medicine, agriculture, scientific research, teaching, quality supervision and other fields, for the determination of nitrogen or protein content. It can also be used for the detection of ammonium salts, volatile fatty acids/alkalis, etc.
IV. Configuration list
No. Name Quantity Unit
1 Host 1 table
2 manual 1 book
3 Certificate of Conformity 1 copy
4 Product warranty card 1 copy
5 Nitrogen fixing tube 10
6 condensation inlet pipe 1
7 condensation outlet pipe 1
8 distilled water inlet pipe 1
9 Alkaline tube 1
10 boric acid tube 1
11 Discharge pipe 1
12 Power cord C14 3x0.75 1pc
13 Print paper 2 rolls
V. Graphic parameters
