Nanomaterials in consumer products: a challenging analytical problem.

Area of Science:

• Analytical Chemistry
• Materials Science
• Consumer Product Safety

Background:

• Nanotechnology is increasingly used in consumer products, including cosmetics and food.
• Nano-sized particles (NPs) are added to enhance product quality but pose potential risks.
• Assessing the benefits versus risks of engineered nanomaterials requires understanding exposure levels and hazards.

Purpose of the Study:

• To review analytical techniques for detecting, characterizing, and quantifying NPs in complex matrices like food and cosmetics.
• To highlight challenges in analyzing low-concentration NPs within intricate product formulations.
• To discuss the application of these techniques for specific metal and metal-oxide NPs.

Main Methods:

• Focus on analytical techniques suitable for NP identification, quantification, and characterization.
• Review of recent applications in food and cosmetic matrices.
• Emphasis on complementary data from various metrics for comprehensive characterization.

Main Results:

• Analytical challenges exist due to low NP concentrations and complex product matrices.
• Specific metal and metal-oxide NPs in food and cosmetics have been characterized using reviewed techniques.
• The need for complete NP characterization, combining multiple metrics, is evident.

Conclusions:

• Standardized materials and validated methodologies are essential for accurate NP analysis.
• Further research is needed to establish number-based size distributions and quantitative data in complex matrices.
• Robust analytical methods are critical for consumer protection and regulatory oversight of nanomaterials.