Chelating agents are a class of compounds with electrophilic groups that can form stable complexes with metal ions. Common chelating agents include organic compounds, inorganic salts, and polymers.
The following are some common chelating agents:
Organic chelating agents: such as ethylene diamine tetraacetic acid (EDTA), nitroso triacetic acid (NTA), citric acid, etc.
Phenolic chelating agents: such as salicylic acid, catechol (BAPTA), etc.
Amino acid chelating agents: such as lysine, cysteine, etc.
Natural product chelating agents: such as sphingosine, tea polyphenols, etc.
Ion exchange resin: For example, a resin containing amino or carboxyl functional groups, such as sodium polyacrylate resin (Sepharose series).
It should be noted that different chelating agents are suitable for different metal ions. Choosing a suitable chelating agent should take into account factors such as the type of metal ions required for chelation, pH conditions, and requirements for chemical reactions.
In addition, the use of chelating agents should follow corresponding safety operating procedures and be carried out according to the correct dosage and usage method provided in the product manual.