Discerning Emittable from Extractable Chemicals Identified in Consumer Products by Suspect Screening GCxGC-TOFMS

Area of Science:

• Environmental Chemistry
• Analytical Chemistry

Background:

• Characterizing chemicals in household products is crucial for assessing exposure risks.
• Nontargeted analysis techniques are increasingly used for comprehensive chemical profiling.

Purpose of the Study:

• To compare the chemical profiles obtained by solvent extraction versus headspace analysis for household products.
• To evaluate the 'extractable' versus 'emittable' chemical signatures.

Main Methods:

• Analysis of 81 household products using two-dimensional gas chromatography time-of-flight mass spectrometry (GCxGC-TOF-MS).
• Comparison of chemical signatures from solvent extraction and low-temperature headspace emission.
• Data management using advanced processing systems like Highlight.

Main Results:

• Solvent extraction yielded a higher number of chemical features and greater relative abundances.
• Low-temperature headspace emission resulted in fewer features and lower abundances.
• Observed class-based trends in retention time and abundance for different compound classes.

Conclusions:

• Solvent extraction provides a broader view of extractable chemicals but does not directly indicate exposure potential.
• Headspace analysis offers insights into chemicals that can actually leave the product matrix and cause exposure.
• The study highlights the importance of considering analytical methods when assessing chemical exposure from consumer products.