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Review of pretreatment and analytical methods for environmental endocrine disruptors: Phthalates.
Environ Toxicol Chem
January 2025
School of Energy and Environmental Engineering, University of Science and Technology Beijing, 100083China.
Phthalates, known as phthalate esters (PAEs), are among the most ubiquitous pervasive env7ironmental endocrine disruptors (EEDs), extensively utilized globally in various facets of modern life due to their irreplaceable role as plasticizers. The exponential production and utilization of plastic goods have substantially escalated plastic waste accumulation. Consequently, PAEs have infiltrated the environment, contaminating food and drinking water reservoirs, posing notable threats to human health.
View Article and Find Full Text PDFQuantification of micro- and nano-plastics in atmospheric fine particles by pyrolysis-gas chromatography-mass spectrometry with chromatographic peak reconstruction.
J Hazard Mater
January 2025
State Key Laboratory of Advanced Environmental Technology, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China; Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control and Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou 510640, China.
The effects of micro- and nano-plastics (MNPs) on human health are of global concern because MNPs are ubiquitous, persistent, and potentially toxic, particularly when bound to atmospheric fine particles (PM). Traditional quantitative analysis of MNPs by pyrolysis-gas chromatography-mass spectrometry (Py-GC/MS) is often inaccurate because of false positive signals caused by similar polymers and organic compounds. In this study, a reliable analytical strategy combining HNO digestion and chromatographic peak reconstruction was developed to improve the precision of pyrolysis-gas chromatography-mass spectrometry analysis of multiple MNPs bound to PM.
View Article and Find Full Text PDFSpecies of the Intermountain Western United States: A Chemotaxonomic Investigation Based on Essential Oil Compositions.
Plants (Basel)
January 2025
Department of Crop and Soil Science, Oregon State University, Ontario, OR 97914, USA.
is a genus of 98 species, widely distributed in western North America. This work presents a chemometric analysis of the essential oils of seven species of (, var. , , , , , and var.
View Article and Find Full Text PDFLeaf Essential Oil Compositions and Enantiomeric Distributions of Monoterpenoids in Species: , , , , and .
Molecules
January 2025
Aromatic Plant Research Center, 230 N 1200 E, Suite 100, Lehi, UT 84043, USA.
Members of the genus are well known for their medicinal properties, which can be attributed to their essential oils. In this work, we have examined the leaf essential oils of five understudied species collected from various locations in western North America. The essential oils were obtained by hydrodistillation and analyzed by gas chromatographic methods, including enantioselective gas chromatography.
View Article and Find Full Text PDFFluorinated Macrocycle for Adsorptive Separation and Chromatographic Separation of Toluene and Methylcyclohexane.
Chemistry
January 2025
Tianjin Normal University, Chemistry, No393 west Binshui Road, Tianjin, CHINA.
Achieving the adsorptive separation and chromatographic separation of industrially the important chemicals toluene and methylcyclohexane using the same material is a highly desirable goal. We have successfully accomplished this using a fluorinated macrocycle tetrafluoroterphen[3]arene (4FTP3), which was synthesized and used for gas chromatographic separation in our previous work. The macrocycle 4FTP3 permitted the adsorptive separation of toluene from a toluene/methylcyclohexane mixture (1:1, v/v) with a purity of 99.
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