Langyou Chemical
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Choline Chloride Content Test Agno3 Titration Method
Test of silver nitrate titration method for the determination of choline chloride content
1. Introduction
There is a method for testing choline chloride today. Silver nitrate titration is the main method. This test shows the geometry of the content of choline chloride.
Second, material
1. ** Reagent **: silver nitrate standard solution. This solution needs to be precisely matched to ensure the accuracy of titration. Potassium chromate indicator solution is used to indicate the end point of titration.
2. ** Instrument **: burette, selected with clear scale and high precision; conical bottle, tough texture, to test solution.
Third, the method
1. ** Preparation of test solution **: Take an appropriate amount of choline chloride sample, place it in a clean conical bottle, add an appropriate amount of water, and shake it gently to make the sample dissolve.
2. ** Titration operation **: To the conical bottle of the dissolved sample, add a few drops of potassium chromate indicator solution dropwise, and the solution is light yellow. The standard solution of silver nitrate is carefully injected into the burette tube. It can be dripped slightly quickly at the beginning, and it needs to be dripped slowly near the end, and it needs to be shaken while dripping. When the solution turns from yellow to reddish, and the color remains unchanged within half a minute, this is the end point of titration. Note the amount of silver nitrate standard solution.
Fourth, calculate
According to the stoichiometric relationship between silver nitrate and choline chloride reaction, and the amount of silver nitrate standard solution recorded, the content of choline chloride can be calculated. The formula is roughly as follows: Choline chloride content = (concentration of silver nitrate standard solution × dosage of silver nitrate standard solution × correlation coefficient) ÷ sample quality.
Fifth, Conclusion
The content of choline chloride is measured by silver nitrate titration method, which is simple and accurate. However, when operating, all details need to be paid attention to, such as the precision of solution preparation and the stability of titration operation, to obtain a definite number for practical needs.
1. Introduction
There is a method for testing choline chloride today. Silver nitrate titration is the main method. This test shows the geometry of the content of choline chloride.
Second, material
1. ** Reagent **: silver nitrate standard solution. This solution needs to be precisely matched to ensure the accuracy of titration. Potassium chromate indicator solution is used to indicate the end point of titration.
2. ** Instrument **: burette, selected with clear scale and high precision; conical bottle, tough texture, to test solution.
Third, the method
1. ** Preparation of test solution **: Take an appropriate amount of choline chloride sample, place it in a clean conical bottle, add an appropriate amount of water, and shake it gently to make the sample dissolve.
2. ** Titration operation **: To the conical bottle of the dissolved sample, add a few drops of potassium chromate indicator solution dropwise, and the solution is light yellow. The standard solution of silver nitrate is carefully injected into the burette tube. It can be dripped slightly quickly at the beginning, and it needs to be dripped slowly near the end, and it needs to be shaken while dripping. When the solution turns from yellow to reddish, and the color remains unchanged within half a minute, this is the end point of titration. Note the amount of silver nitrate standard solution.
Fourth, calculate
According to the stoichiometric relationship between silver nitrate and choline chloride reaction, and the amount of silver nitrate standard solution recorded, the content of choline chloride can be calculated. The formula is roughly as follows: Choline chloride content = (concentration of silver nitrate standard solution × dosage of silver nitrate standard solution × correlation coefficient) ÷ sample quality.
Fifth, Conclusion
The content of choline chloride is measured by silver nitrate titration method, which is simple and accurate. However, when operating, all details need to be paid attention to, such as the precision of solution preparation and the stability of titration operation, to obtain a definite number for practical needs.
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