Colorimetric determination of aliphatic acids

Area of Science:

• Analytical Chemistry
• Organic Chemistry

Background:

• Carboxylic acids are vital organic compounds with diverse applications.
• Accurate quantification of carboxylic acids is essential in various scientific fields.
• Existing analytical methods may have limitations in terms of specificity or ease of use.

Purpose of the Study:

• To develop a novel colorimetric assay for the determination of carboxylic acids.
• To establish a straightforward and sensitive method for acid analysis.

Main Methods:

• A colorimetric method was developed utilizing the dicyclohexylcarbodiimide-coupled reaction.
• The reaction involved 2-nitrophenylhydrazine and carboxylic acids.
• The reaction product was extracted into aqueous sodium hydroxide, generating a blue color.

Main Results:

• The developed method successfully determined carboxylic acids via a colorimetric reaction.
• A distinct blue color was observed upon extraction of the reaction product.
• The method demonstrated suitability for analyzing aliphatic acids.

Conclusions:

• A new colorimetric method offers a viable approach for carboxylic acid determination.
• The assay is specific for aliphatic acids, with aromatic acids not yielding a positive result.
• This method provides a useful tool for specific acid analyses in chemistry.