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How To Measure Ammonia In Water
The method of measuring ammonia in water
Water depends on the spirit of all things. Among them, the content of ammonia is related to the quality of water quality, and it has a significant impact on the health of humans and animals and the balance of ecology. Therefore, the method of measuring ammonia in water is an urgent task.
First, the method of color comparison can be used. First make a series of ammonia standard solutions, and add specific reagents in sequence to change the color of the raw material. Such as Nessler's reagent, ammonia will develop color in case of ammonia, and the depth of color is related to the ammonia content. Take an appropriate amount of water sample, add the same reagent, and compare the color with the standard solution to know the ammonia content of the water sample. This method is simple and easy to implement, but it requires fine operation and is sensitive to environmental factors.
Second, the ion selective electrode method is also commonly used Immerse the water sample with an electrode that has a specific response to ammonia ions. The potential difference between the electrode and the reference electrode is related to the activity of ammonia ions. After the calibration curve, the ammonia content can be calculated. This method is fast and sensitive, and can measure low concentrations of ammonia, but the electrodes need frequent maintenance and calibration.
Furthermore, the gas phase molecular absorption spectrometry method. Adjust the water sample to a specific pH to convert ammonia into ammonia gas and escape. Introduce the carrier gas into the measurement system to measure its absorption of light at a specific wavelength. According to the relationship between absorbance and ammonia content, the ammonia value of the water sample is obtained. This method has high accuracy and less interference, and is suitable for complex water samples.
There are many methods for measuring ammonia in water, each with its advantages and disadvantages. The user should carefully select the method according to the characteristics of the water sample and the requirements of the measurement accuracy, in order to obtain accurate results and maintain the cleanliness of the water and the safety of the ecology.
Water depends on the spirit of all things. Among them, the content of ammonia is related to the quality of water quality, and it has a significant impact on the health of humans and animals and the balance of ecology. Therefore, the method of measuring ammonia in water is an urgent task.
First, the method of color comparison can be used. First make a series of ammonia standard solutions, and add specific reagents in sequence to change the color of the raw material. Such as Nessler's reagent, ammonia will develop color in case of ammonia, and the depth of color is related to the ammonia content. Take an appropriate amount of water sample, add the same reagent, and compare the color with the standard solution to know the ammonia content of the water sample. This method is simple and easy to implement, but it requires fine operation and is sensitive to environmental factors.
Second, the ion selective electrode method is also commonly used Immerse the water sample with an electrode that has a specific response to ammonia ions. The potential difference between the electrode and the reference electrode is related to the activity of ammonia ions. After the calibration curve, the ammonia content can be calculated. This method is fast and sensitive, and can measure low concentrations of ammonia, but the electrodes need frequent maintenance and calibration.
Furthermore, the gas phase molecular absorption spectrometry method. Adjust the water sample to a specific pH to convert ammonia into ammonia gas and escape. Introduce the carrier gas into the measurement system to measure its absorption of light at a specific wavelength. According to the relationship between absorbance and ammonia content, the ammonia value of the water sample is obtained. This method has high accuracy and less interference, and is suitable for complex water samples.
There are many methods for measuring ammonia in water, each with its advantages and disadvantages. The user should carefully select the method according to the characteristics of the water sample and the requirements of the measurement accuracy, in order to obtain accurate results and maintain the cleanliness of the water and the safety of the ecology.
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