Weight management

Adjust the pH first or mix it first?

Because the mixing process may affect the pH value of the material when exploring the pH value, it is necessary to mix first and then adjust the pH, and the temperature is because if you mix and then adjust the temperature, it may affect the experimental results because the temperature is not the predetermined temperature at the beginning of the reaction. That’s all I know. If you have any questions, check the information yourself or consult a professional to answer them for you!

skin care routine for combination skin ph

How does pca adjust the pH value?

The answer is as follows: PCA (polycyanic acid) is a commonly used cosmetic ingredient, which can adjust the pH value in skin care products. To adjust the pH value, you can follow these steps:

1. Determine the target pH: Determine the desired target pH according to the type of skin care product and the need for formulation.

2. Select the appropriate acid-base regulator: Select the appropriate acid-base regulator according to the target pH. Commonly used acid regulators are citric acid, lactic acid, etc., and alkali regulators are sodium hydroxide, sodium bicarbonate, etc.

3. Gradually add acid-base regulator: Gradually add the selected acid-base regulator to the skin care product and stir well to mix. After each addition, measure the pH until the target pH is reached.

4. Detection and adjustment: Use tools such as pH meters to detect the pH of skin care products. If the pH value is too high, you can continue to add acid regulators; if the pH value is too low, you can continue to add alkali regulators. After each addition, the pH value should be thoroughly mixed and measured until the target pH value is reached.

It should be noted that care should be taken when adjusting the pH value to avoid excessive addition of acid-base regulators so as not to cause irritation to the skin. In addition, the adjustment of pH value should also consider the stability and safety of the product to ensure the quality and effect of the product. It is best to adjust the pH value under the guidance of a laboratory or professional.

How to use the pH buffer solution?

The pH buffer is an important factor to ensure the accuracy of the pH measurement. The standard buffer is used to calibrate the pH sensor and check its performance. The buffering ability of the pH buffer is its important property. This property allows the pH buffer to maintain a constant pH value even when external substances are added to the buffer.

How to use the pH buffer:

• First take a small amount of the correction solution and rinse a small measuring cup, and then add an appropriate amount of the correction solution (the liquid level does not exceed the sensing probe of the electrode).

• Correct according to the instruction manual of the electronic pH test pen.

• Since the correction solution is a high-precision liquid, it is the guarantee of the precision of the electronic pH test pen. Therefore, the used correction solution cannot be poured back into the bottle, so as not to affect the accuracy of the correction solution, bring bacteria, etc., and cause the correction solution to fail to continue to be used.

Preparation and storage of pH buffer:

1. The pH reference material should be stored in a dry place. For example, the mixed phosphate pH reference material will deliquesce when the air humidity is high. Once deliquescence occurs, the pH reference material cannot be used.

2. Secondary distilled water or deionized water should be used to prepare the pH standard solution. If it is used for pH meter measurement of grade 0. 1, ordinary distilled water can be used.

3. A smaller beaker should be used to dilute the pH standard solution to reduce the pH standard solution stained on the wall of the beaker. Plastic bags or other containers for storing pH standard substances should be rinsed with distilled water several times, and then poured into the prepared pH standard solution to ensure that the prepared pH standard solution is accurate.

4. The prepared standard buffer solution can generally be stored for 2-3 months. If it is found to be cloudy, moldy or precipitated, it cannot continue to be used.

5. The alkaline standard solution should be sealed and stored in a polyethylene bottle to prevent carbon dioxide from entering the standard solution to form carbonic acid and reduce its pH.

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