Comprehensive Characterization of Organic Light-Emitting Materials in Breast Milk by Target and Suspect Screening

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(11), P. 5103 - 5116

Published: March 6, 2024

Organic light-emitting materials (OLEMs) are emerging contaminants in the environment and have been detected various samples. However, limited information is available regarding their contamination within human body. Here, we developed a novel QuEChERS (quick, easy, cheap, effective, rugged, safe) method coupled with triple quadrupole/high-resolution mass spectrometry to determine OLEMs breast milk samples, employing both target suspect screening strategies. Our analysis uncovered presence of seven out 39 targeted comprising five liquid crystal monomers two commonly used organic diode displays. The cumulative concentrations each sample ranged from ND 1.67 × 103 ng/g lipid weight, mean median concentration 78.76 0.71 respectively, which were higher compared that typical pollutants such as polychlorinated biphenyls polybrominated diphenyl ethers. We calculated estimated daily intake (EDI) rates for infants aged 0–12 months, EDI during lactation range 30.37 54.89 ng/kg bw/day. Employing approach, additionally identified 66 potential OLEMs, them, cholesteryl hydrogen phthalate benzoate, further confirmed using pure reference standards. These substances belong cholesteric raise concerns about endocrine-disrupting effects, indicated by silico predictive models. Overall, our present study established robust identification shedding light on findings indicate exposure should be investigated, including health risks.

Language: Английский

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First Report on the Trophic Transfer and Priority List of Liquid Crystal Monomers in the Pearl River Estuary

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(36), P. 16131 - 16141

Published: Aug. 27, 2024

Liquid crystal monomers (LCMs) are emerging organic pollutants due to their potential persistence, toxicity, and bioaccumulation. This study first characterized the levels compositions of 19 LCMs in organisms Pearl River Estuary (PRE), estimated bioaccumulation trophic transfer potential, identified priority contaminants. were generally accumulated from sediment, LCM concentrations all ranged 32.35 1367 ng/g lipid weight. The main biphenyls analogues (BAs) (76.6%), followed by cyanobiphenyls (CBAs) (15.1%), least fluorinated (FBAs) (11.2%). most abundant BAs, FBAs, CBAs 1-(4-propylcyclohexyl)-4-vinylcyclohexane 1-ethoxy-2,3-difluoro-4-(4-(4-propylcyclohexyl) cyclohexyl) benzene (EDPBB, 10.1%), 4'-propoxy-4-biphenylcarbonitrile (5.1%), respectively. niche studies indicated that PRE food web was composed terrestrial-based diet marine chains. Most exhibited biodilution chains, except for EDPBB 4,4'-bis(4-propylcyclohexyl) biphenyl (BPCHB). hydrophobicity, position fluorine substitution LCMs, biological habits may be important factors affecting LCMs. BPCHB, 1-(prop-1-enyl)-4-(4-propylcyclohexyl) cyclohexane, as reports processes mechanisms biomonitoring PRE.

Language: Английский

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Facile and rapid preparation of fluorinated imprinted adsorbent for magnetic solid phase extraction of liquid–crystal monomers

Microchimica Acta, Journal Year: 2024, Volume and Issue: 192(1)

Published: Dec. 6, 2024

Language: Английский

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Analysis of 78 Trace Liquid Crystal Monomers in Air by Gas Chromatography Coupled with Triple Quadrupole Mass Spectrometry

Published: Jan. 1, 2024

Liquid crystal monomers (LCMs) comprise a class of emerging organic pollutants that have garnered considerable attention because their dioxin-like toxicity and presence in various environments. However, limited information about the identities, occurrence, distribution LCMs has highlighted an urgent need for high-throughput sensitive analytical method. In this study, we developed validated rapid, simple, method involves minimal solvent consumption. The was applied simultaneous detection identification 78 air particulate samples using gas chromatography coupled with triple quadrupole mass spectrometry. results showed high degrees linearity correlation coefficients greater than 0.995 concentration range 5.0-500 ng/mL. instrumental limits ranged from 0.7 to 5.3 pg, 0.0004 0.009 pg/m3. recoveries most targeted LCM standards spiked were between 69% 150%, relative standard deviations six replicates less 15% at three levels spiking (10, 50, 200 ng/mL). analyze real Beijing, China. Overall, 61 present 71.71 164.15 pg/m3, mean 99.9 Among them, PVB abundant, average 33.57 total estimated daily intakes adults children 17.18 51.25 pg/kg bw/day, respectively. Accordingly, described herein is suitable quantifying atmospheric samples. As such, it will be valuable investigating environmental behaviors, risk assessments.

Language: Английский

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Waste-to-Resources: Exploratory Investigation of Sludge Biochar after Adsorption of Heavy Metals for Cement Mortar Production

Published: Jan. 1, 2024

Language: Английский

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First report on liquid crystal monomers in tree barks surrounding a display manufacturer: Insights for atmospheric transport and establishment of priority list

Journal of Hazardous Materials, Journal Year: 2024, Volume and Issue: 477, P. 135372 - 135372

Published: July 28, 2024

Language: Английский

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A Comparative Study on Contamination Profiles of Liquid Crystal Monomers (LCMs) between Outdoor and Indoor Dusts, and the Assessment of Health Risk of Human Exposure

Chemosphere, Journal Year: 2024, Volume and Issue: 366, P. 143545 - 143545

Published: Oct. 1, 2024

Language: Английский

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Facile and rapid preparation of magnetic imprinted adsorbent for specific separation and capture of liquid-crystal monomers pollutants in environmental water and soil samples

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 15, 2024

Specific separation and extraction is a pivotal stage in the accurate quantification of liquid crystal monomers (LCMs) pollutants complex environmental samples. In this context, new fluorinated imprinted adsorbent (MIA) for magnetic solid phase (MSPE) was one-pot prepared within 3.5 h using 4-[difluoro(3,4,5-trifluorophenoxy)methyl]-3,5-difluoro-4'-ethyl-biphenyl (DFBP) as template 1H,1H,2H,2H-heptadecafluorodecyl acrylate/vinylanthracene dual monomers. The structure, morphology properties MIA fabricated beneficial conditions were investigated by various characterized techniques. Under optimal parameters, presented satisfactory specific recognition performance. factor adsorption capacity towards DFBP high 2.7 15.9 mg/g, respectively. At same time, behaviors MIA/MSPE surveyed means kinetics isotherm. Combining with HPLC coupled diode array detector (DAD), sensitive, reliable anti-interference method monitoring LCMs residuals water soil samples established. achieved enrichment factors 132–248 96–204 samples, corresponding limits detection 0.0017–0.0051 µg/L 0.087–0.28 µg/kg, Moreover, confirmatory experiments adopted to inspect accuracy established MIA/MSPE-HPLC/DAD approach. To best our knowledge, first time that material isolation capture which have been classified emerging organic pollutants.

Language: Английский

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Occurrence, Seasonal Variation, and Health Risks of PM2.5-bound Liquid Crystal Monomers (LCMs) in Beijing, China

Journal of Hazardous Materials, Journal Year: 2024, Volume and Issue: 485, P. 136960 - 136960

Published: Dec. 20, 2024

Language: Английский

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