Title | Semiquantitative Nontargeted Screening of Organophosphorus Plastic Additives in Consumer Products Using P NMR. |
Publication Type | Journal Article |
Year of Publication | 2025 |
Authors | Chen, W, Miller, JM, Burns, DC, Almuhtaram, H, Andrews, RC, Peng, H |
Journal | Environ Sci Technol |
Date Published | 2025 Jun 02 |
ISSN | 1520-5851 |
Abstract | Mass spectrometry (MS) is typically employed for the nontargeted identification of unknown organophosphorus compounds (OPCs). However, quantitative analysis remains a major challenge due to the lack of authentic standards for most of the OPCs. A phosphorus NMR (P NMR) method for semiquantitative nontargeted analysis was developed and applied to 37 different plastic products, where OPCs were detected in nine at high concentrations (86.9-7206 nmol/g). Three classes of compounds were detected with clearly separated chemical shifts, including organophosphites (δ = 125-140 ppm) and organophosphates (δ = (-20)-5 ppm), as well as an unexpected "unannotated" class (δ = 5-20 ppm). The "unannotated" class was subsequently identified as organophosphite diesters and confirmed through in-lab hydrolysis trials. In this work, we demonstrate how a P NMR method may serve as a powerful analytical tool when combined with mass spectrometry for the nontargeted analysis of OPCs. We highlight organophosphite diesters as a novel class of compounds which represent a potential source of organophosphate diesters in the environment. |
DOI | 10.1021/acs.est.5c02789 |
Alternate Journal | Environ Sci Technol |
PubMed ID | 40455101 |