How to mix EDTA
EDTA (ethylenediaminetetraacetic acid) is a commonly used chelating agent widely used in chemical, biological and medical fields. This article will introduce the preparation method of EDTA in detail, and provide you with a structured data guide based on the hot topics and hot content on the entire network in the past 10 days.
1. Basic information about EDTA
EDTA is a white crystalline powder, easily soluble in water and alkaline solutions, and can form stable complexes with a variety of metal ions. The following are the basic properties of EDTA:
| nature | numerical value |
|---|---|
| Molecular formula | C10H16N2O8 |
| molecular weight | 292.24 g/mol |
| Solubility | 0.5 g/L (water, 25°C) |
| pH range | 4.0-8.0 |
2. Preparation steps of EDTA
The following is the preparation method of EDTA standard solution:
| steps | Operation |
|---|---|
| 1 | Weigh an appropriate amount of EDTA disodium salt (Na2EDTA·2H2O), usually 3.722 g. |
| 2 | Dissolve EDTA disodium salt in approximately 500 mL of deionized water. |
| 3 | Adjust pH to 8.0 with NaOH or HCl. |
| 4 | Dilute to 1 L and shake well. |
3. Hot topics in the past 10 days and the application of EDTA
The following are the hot topics and content related to EDTA in the past 10 days on the Internet:
| hot topics | Related content |
|---|---|
| Environmental protection field | EDTA is used in heavy metal wastewater treatment, and its application cases have been reported in many places recently. |
| medical research | New developments in EDTA as an anticoagulant in blood testing. |
| Cosmetics | The safety of EDTA in skin care products has sparked discussion. |
| food safety | Updated standards for the use of EDTA as a food additive. |
4. Precautions
Please note the following when preparing EDTA solution:
| Things to note | Description |
|---|---|
| Dissolution rate | EDTA dissolves slowly and can be accelerated by heating or stirring appropriately. |
| pH adjustment | The pH needs to be accurately adjusted to the required range to avoid affecting the chelation effect. |
| Storage conditions | EDTA solution should be stored away from light to prevent decomposition. |
5. Summary
Although the preparation of EDTA is simple, you need to strictly follow the steps and pay attention to relevant matters. At the same time, EDTA's application in environmental protection, medicine, cosmetics and other fields has also attracted much attention. I hope this article can provide you with practical reference information.
If you need to know more about the specific application or preparation details of EDTA, it is recommended to consult professional literature or consult relevant experts.
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