Hyauronic Acid Filler,Ha Filler,Lip Filler,Breast And Butt Filler,Anti Wrinkle Filler 1Ml WEIYE TECHNOLOGY CO.,LTD , https://www.radiassero.com
The reagents used in the ozone aging test should be of analytical grade, and the ozone aging chamber must be filled with distilled water throughout the procedure.
To prepare the starch indicator solution: dissolve 1 gram of soluble starch in 40 mL of cold water while continuously stirring. Heat the mixture to boiling until the starch is fully dissolved. Then, dilute the solution to approximately 200 mL using cold water. Add 2 grams of zinc chloride crystals, allow the solution to clarify, and carefully decant the supernatant for use. This solution should be replaced every two to three days if stored for regular use. Alternatively, you can prepare a fresh solution by dissolving 1 gram of soluble starch in 100 mL of boiling water. Regardless of the method, add a few drops of 10% acetic acid to the solution before titration.
Next, the standard iodine solution: Weigh 2 grams of potassium iodide (KI) into a weighing boat and add 10 mL of water. Carefully add iodine crystals to the solution on the balance until the total mass of iodine reaches approximately 0.1 grams. Accurately measure the weight of the solution and calculate the amount of iodine added. Transfer the solution to a beaker, rinse the weighing boat with distilled water, and pour the rinsed liquid into a 1000 mL volumetric flask. Dilute the solution to the mark with distilled water. Store this solution in a tightly sealed brown bottle in a dark place, as it remains stable under these conditions.
For the sodium thiosulfate solution: Dissolve approximately 0.24 grams of sodium thiosulfate pentahydrate (Na₂S₂O₃·5H₂O) in a 1000 mL volumetric flask and dilute to the mark with distilled water. The concentration of this solution should match that of the standard iodine solution. However, since sodium thiosulfate tends to degrade over time, it is recommended to calibrate the solution against the iodine solution on the day of the test.
The concentration E of the sodium thiosulfate solution is calculated based on the iodine equivalent and expressed as the number of milligrams of iodine per liter of solution. The formula is:
E = (F × C) / S
Where:
- F = volume of iodine solution used, in mL
- C = concentration of iodine solution, in mg/mL
- S = volume of sodium thiosulfate solution used in titration, in mL
The potassium iodide solution is prepared by dissolving about 20 grams of pure KI in 2000 mL of distilled water.
Lastly, the acetic acid solution: prepare a 10% (by volume) solution.
These reagents are essential for accurately determining the ozone concentration within the aging chamber. If you're interested in learning more about ozone aging chambers or want to explore their applications, feel free to visit our website for additional information.
[Image: Ozone aging box.jpg]