Quantitative determination of formaldehyde in cosmetics using a combined solid-phase microextraction-isotope dilution...

Area of Science:

• Analytical Chemistry
• Environmental Science

Background:

• Formaldehyde is a common contaminant in cosmetic products, posing potential health risks.
• Accurate and reliable quantification methods are crucial for ensuring consumer safety and regulatory compliance.

Purpose of the Study:

• To develop and validate a simple, fast, and reliable method for formaldehyde analysis in cosmetic products.
• To utilize solid-phase microextraction (SPME) coupled with isotope dilution mass spectrometry (ID-MS) for enhanced accuracy.

Main Methods:

• Solid-phase microextraction (SPME) with a poly(dimethylsiloxane)-divinylbenzene fiber for formaldehyde derivatization using pentafluorophenyl hydrazine.
• Gas chromatography-mass spectrometry (GC-MS) for the analysis of the formed hydrazone.
• Quantification using a stable isotope-labeled analogue as an internal standard for isotope dilution mass spectrometry (ID-MS).

Main Results:

• The method demonstrated high precision with relative standard deviations below 10% for spiked cosmetic samples.
• Recoveries ranged from 89.00% to 101.23%, indicating excellent accuracy.
• A low limit of detection of 0.39 µg/L was achieved, suitable for sensitive analysis.

Conclusions:

• The developed SPME-ID-MS method offers a simple, fast, and reliable approach for formaldehyde determination in cosmetics.
• This technique provides accurate and precise results, ensuring the safety and quality of cosmetic products.
• The method is a valuable tool for regulatory bodies and manufacturers monitoring formaldehyde levels.