The determination of fly ash ammonia content is an important work that can be carried out by the following steps:
Prepare the sample: take a certain amount of fly ash sample and put it into a dry and clean container, which has good air tightness. Then a weighing is carried out and the quality of the sample is recorded.
Sample Treatment: Mix the fly ash sample with an appropriate amount of alkaline solution and stir well. It is then poured into the distillation unit, connected to the condenser, and heated for distillation.
Distillation: During the distillation process, ammonia is condensed into a liquid through a condenser and collected in a receiving bottle. Record the volume of liquid in the receiving bottle.
Preparation of standard solution: select an appropriate amount of standard ammonium chloride solution, add an appropriate amount of phenolphthalein indicator, and add an appropriate amount of sodium hydroxide solution dropwise to make the solution reddish. It is then compared to the distilled ammonia solution to determine the concentration of ammonia.
Blank test: In order to eliminate experimental errors, a blank test is required. Under the same conditions, distilled water was used instead of the sample for distillation, and the volume of liquid in the receiving bottle was recorded.
Calculation of results: The amount of ammonia in the fly ash sample is calculated based on the volume of the liquid in the receiving bottle, the concentration of the standard solution and the results of the blank test.
It should be noted that when determining ammonia content, it is necessary to ensure the consistency of experimental conditions and avoid errors. At the same time, it is necessary to strictly abide by the operating procedures to avoid the occurrence of safety accidents.
In addition, in addition to the above methods, other methods can be used to determine the ammonia content in fly ash. For example, the ion-selective electrode method, titration method, etc. can be used for the determination. Different methods have different advantages and disadvantages, and the appropriate method can be selected according to the specific situation.
In summary, the determination of fly ash ammonia content needs to be carried out in strict accordance with the operating procedures. The ammonia content in fly ash can be accurately determined through steps such as sample preparation, sample processing, distillation treatment, preparation of standard solutions, blank tests and calculation of results. At the same time, it is necessary to pay attention to the safety and accuracy of experiments to avoid errors.