Answers to frequently asked questions about Kye's nitrogen fixers

The FAQ of Kye's nitrogen fixer is widely used in nitrogen content or protein content analysis of samples such as food, crops, seeds, soil, fertilizer, etc. because of its simple operation and high cost-effectiveness. most of the nitrogen fixer products on the
market are based on the principle of Kye's nitrogen fixation test analysis of nitrogen content in the sample, mainly composed of distillation, de solution, titration device, the specific workflow is: under the action of the catalyst, the use of sulfuric acid will sample Digestion, the organic nitrogen decomposition into inorganic nitrogen, the production of ammonium sulfate, in the hot steam to the dissolved ammonium sulfate added alkaline distillation, and then titration with standard acid solution, through the formula to calculate the nitrogen content.
ket nitrogen meter is a commonly used analytical instrument, users will inevitably encounter some problems when using.
1, what are the common Kyth nitrogen fixers in the market? There are many current classifications in the market, the common classification is: (1) semi-automatic nitrogen fixer: only the distillation part does not contain titration.
titration requires manual titration.
semi-automatic current market is divided into two kinds: 1) manual alkali, manual watering, manual control distillation time.
2) automatic alkali, automatic rehydration, automatic acid addition, the whole distillation experimental process does not require human intervention.
(2) fully automatic Ket nitrogen fixer: distillation, titration integrated design, sample digestion after full into the instrument automatic watering, automatic alkali, automatic rehydration, automatic acidification, automatic titration and results calculation and printing.
the entire experimental process without human intervention, greatly reducing the workload of laboratory personnel, improve work efficiency, and test results are more accurate.
2, nitrogen meters are mainly used in those industries? Nitrogen fixation is mainly used to determine the content of nitrogen and crude proteins in the sample.
mainly used in food, feed, agriculture, research institutes, medicine, universities, daily chemical, soil fertilizer and other nitrogen determination method in samples of nitrogen and crude protein-related experiments.
3, Ky.'s nitrogen fixation work on the water quality requirements? The distilled water barrel of the Keshi nitrogen fixer should be filled with distilled water or pure water, and the machine will not need to release the water in the distiller for a long time.
4, Ky.'s nitrogen meter turned on no sound is what's going on? If the red light in the machine power switch is on, the insurance tube in the nitrogen fixer is burned out and the safety tube is located in a black shell inside the machine near the power switch interface 5 centiters.
5, Keshi nitrogen meter on the distiller can not add water how to solve? After half a minute of powering on, check whether the distilled water bucket is leaking gas, can be filled with gas drum is normal.
Check whether the water level in the distilled bucket is more than one-third, not enough to make up, check the position of the distilled bucket, below the table where the instrument is placed, pressure is not enough to add water, check whether the distilled water bucket inlet, inlet pipe is faulty, the wrong bucket will produce bubbles and sound, check the drainage valve, should be closed.
6, Keshi nitrogen meter steamer does not heat, can not produce steam? If the machine can normally add alkali, can not heat out steam, determine that the heating wire may burn out, can take a multi-use meter to measure the heating wire positive and negative pole, not through can determine the heating wire damage, for a new heating wire.
If the machine can not add alkali normally, after powering on and without any sound, the fuse is judged to be burned out, the position of the insurance tube inside the machine near the power switch interface 5 centi-centter black shell.
sound is normal when working on the 7th and Kels nitrogen fixers? This is normal, this is the sound of the internal gas pump working.
8, Keshi nitrogen fixer work can not add alkali, add alkali no sound? Check the alkali barrel for air leakage, filled with gas drum, the machine can work properly.
no pressure, may be due to acid-base lines or air pump leakage, damage, need to replace the line or gas pump in a timely manner.
acid-base barrel has pressure, but can not add fluid, may be due to the solenoid valve power supply is not connected or the internal crystallization of the solenoid valve blocked lines, need to timely power off to check the solenoid valve wiring or disassemble the solenoid valve.
long use time of the instrument, the alkali tube will crystallize inside, the flow rate is reduced when liquid is added, there is no sound.
9, nitrogen meter in the work, from the top of the smoke-like gas? Check that the tap of the cooling water infested water is turned on, that the cooling water is turned off or that the amount of water is small will cause the vapor from the digestive tube to not be condensed, and the water vapor coming out of the machine is similar to smoke.
10, nitrogen fixer in the use of digestive tube into full water how to solve? Nitrogen fixation device in the use of digestive tube into full water, is due to the machine control water leveler conductivity reduction caused.
solution: turn on the water leveler to remove the probe and polish it with sandpaper, remove the oxidation layer, add 3-5 grams of laboratory sodium chloride to the distilled bucket, and shake and dissolve.
11, nitrogen fixation instrument in the use of distillers, water levelers into full water, boric acid absorption liquid container into water, how to solve? This is caused by a decrease in the conductivity of the machine-controlled water leveler.
solution: turn on the water leveler to remove the probe and polish it with sandpaper, remove the oxidation layer, add 3-5 grams of laboratory sodium chloride to the distilled bucket, and shake and dissolve.
12, boric acid absorption fluid in the absorption of sometimes bubbles pop out, will not affect the results? A: No, because in the condensation process there will be air following ammonia into the absorption fluid will produce bubbles, is a normal phenomenon, no effect on the experimental results.
13, nitrogen fixer in the use of the digestive tube in the white tube reverse suction how to solve? The instrument stops working, the distiller stops heating, the gas valve fails to close in time, and the reverse suction phenomenon occurs.
can be used to make small holes in the white tube.
valve is damaged, cannot be closed, and can also be resorpted.
is it normal to make a sound every 3-5 seconds during the operation of the nitrogen fixer at 14? This sound is a normal phenomenon, the instrument working state, the distiller will continue to heat to produce water vapor and consume water, the instrument will automatically open the water valve to rehydrate, the sound is the water valve open, close the sound, is a normal phenomenon.
15, Keshi nitrogen meter in distillation when rolling violently, pose a danger to the operator? Not dangerous, the Kels nitrogen fixer rolls violently during distillation because water vapor enters the digestive tract in large quantities, causing the liquid to roll over, not as a result of a violent reaction.
and the instrument has an overpressurized protection device to maintain normal pressure inside the line and avoid hazards.
16, nitrogen meter can use other color indicators? If manual titring is used, other color indicators can be selected.
the use of fully automatic instruments, color indicators should be configured in accordance with the proportions specified in the product, and no other reagents should be replaced.
the built-in color change process of the product has been adjusted to a good state at the factory, ensuring the accuracy of the results.
17, how to ensure the recovery rate of samples? Sample recovery rate represents the accuracy of the instrument, but also reflects the entire instrument production process, so the sample recovery rate is an important indicator to evaluate the quality of equipment.
main factors affecting recovery rate are distillation time, alkali, boric acid is excessive, digestion is complete, the sealing of the instrument.
cooling water flow, water pressure, water temperature is too high.