Sensitive and visual detection of p-phenylenediamine by using dialdehyde cellulose membrane as a solid matrix

Area of Science:

• Analytical Chemistry
• Materials Science

Background:

• p-phenylenediamine (PPD) is a common hair dye component.
• Sensitive and visual detection methods for PPD are needed.

Purpose of the Study:

• Develop a novel, sensitive, and visual method for PPD detection.
• Utilize a dialdehyde cellulose membrane (DCM) for PPD immobilization and enrichment.

Main Methods:

• Immobilized PPD on DCM, reacted with salicylaldehyde to form a solid fluorescent membrane (S-PPD-DCM).
• Optimized experimental variables for fluorescence signal.
• Investigated detection limits, linear ranges, and selectivity.

Main Results:

• Achieved a detection limit of 5.35 μg L⁻¹ with two linear ranges (10-100 and 100-1000 μg L⁻¹).
• Visual detection by naked eye possible at 50 μg L⁻¹.
• Demonstrated good selectivity against related compounds.

Conclusions:

• The developed method offers sensitive and visual PPD detection.
• The DCM matrix enhances PPD enrichment and fluorescence.
• Successfully applied to spiked hair dye samples.