New method to determination of naphthalene in ambient air using cold fiber-solid phase microextraction and gas chromatography–mass spectrometry

Menezes, Helvécio Costa; Paulo, Breno P.; Costa, Nathália T.; Cardeal, Zenilda de Lourdes

doi:10.1016/j.microc.2012.03.031

Cited by 19 publications

(6 citation statements)

References 34 publications

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“…Assuming that the a axis is common, the Φ (β) scan shown in Figure 8 , which shows a 12° separation of the two-fold symmetric peaks, can be reasonably explained. The model structure of the twins in the real space is Figure 9 , which was drawn using a software VESTA 48 using the atomic coordinate in ref ( 40 ). The model structure of the twins in the real space is shown in Figure 9 .…”

Section: Resultsmentioning

confidence: 99%

Growth of Pentacene Crystals by Naphthalene Flux Method

Yang

Maeno

et al. 2022

ACS Omega

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We report the crystal growth of pentacene from a solution of naphthalene. The solubility of pentacene in naphthalene was evaluated by optical absorption at elevated temperature. The crystal growth was performed in an H-shaped sealed glass tube or metal vessels sealed with ultrahigh-vacuum compatible flanges placed in heated two-zone aluminum blocks. The obtained crystals had a single-crystal-like appearance and flat surface. They were made of aligned microtwins of the “bulk type” (interlayer spacing 14.5 Å) polymorph.

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Section: Resultsmentioning

confidence: 99%

Growth of Pentacene Crystals by Naphthalene Flux Method

Yang

Maeno

et al. 2022

ACS Omega

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“…48 Atmosphere PAH concentrations are generally measured at the scale of a city or territory at variable distances from the sources and submitted to air dilution and dispersion. Recently, few studies reported concentrations measured at a smaller scale which exceeded 30 μg.m −3 (naphthalene) in heavy-traffic highways 49 and ranged from 70 to >2000 μg.m −3 (Σ15PAHs) in vehicle exhausts. 50 Therefore, our EC PHE concentrations are still relevant to environmental pollution conditions.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Exposure Chambers for Studying the Partitioning of Atmospheric PAHs in Environmental Compartments: Validation and Calibration Using Experimental and Computational Approaches

Desalme

Roy

Binet

et al. 2013

Environ. Sci. Technol.

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The environmental partitioning of atmospheric polycyclic aromatic hydrocarbons (PAHs) conditions their entry into food chains and subsequent risks for human health. The need for new experimental exposure devices for elucidating the mechanisms governing ecosystemic PAH transfer motivated the elaboration of an original small-scale exposure chamber (EC). A dual approach pairing experimentation and computational fluid dynamics (CFD) was selected to provide comprehensive validation of this EC as a tool to study the transfer and biological effects of atmospheric PAH pollution in microsystems. Soil samples and passive air samplers (PASs) were exposed to atmospheric pollution by phenanthrene (PHE), a gaseous PAH, for 2 weeks in examples of the EC being tested, set up under different conditions. Dynamic concentrations of atmospheric PHE and its uptake by PASs were simulated with CFD, results showing homogeneous distribution and constant atmospheric PHE concentrations inside the ECs. This work provides insight into the setting of given concentrations and pollution levels when using such ECs. The combination of experimentation and CFD is a successful ECs calibration method that should be developed with other semivolatile organic pollutants, including those that tend to partition in the aerosol phase.

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“…Naphthalene, a ubiquitous polycyclic aromatic hydrocarbon (PAH), is one of the several air pollutants that affect the human health [1]. Naphthalene is a semi-volatile organic compound (SVOC) according to the U.S. Environmental Protection Agency classification [4], and it has a series of anthropogenic sources, such as chemical industries, gasoline evaporation or oil burning, leading locally to acute exposures [1,5]. In urban areas, vehicle emissions represent the most important source, but naphthalene is also present in the smoke of cigarettes [6].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Toxicity on Lung Cells of By-Products Present in Naphthalene Secondary Organic Aerosols

Albuquerque

Berger

Tomaz

et al. 2021

Life

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In 2018, seven million people died prematurely due to exposure to pollution. Polycyclic aromatic hydrocarbons (PAHs) are a significant source of secondary organic aerosol (SOA) in urban areas. We investigated the toxic effects of by-products of naphthalene SOA on lung cells. These by-products were 1,4-naphthoquinone (1,4-NQ), 2-hydroxy-1,4-naphthoquinone (2-OH-NQ), phthalic acid (PA) and phthaldialdehyde (OPA). Two different assessment methodologies were used to monitor the toxic effects: real-time cell analysis (RTCA) and the Holomonitor, a quantitative phase contrast microscope. The chemicals were tested in concentrations of 12.5 to 100 µM for 1,4-NQ and 1 to 10 mM for 2-OH-NQ, PA and OPA. We found that 1,4-NQ is toxic to cells from 25 to 100 µM (EC50: 38.7 µM ± 5.2); 2-OH-NQ is toxic from 1 to 10mM (EC50: 5.3 mM ± 0.6); PA is toxic from 5 to 10 mM (EC50: 5.2 mM ± 0.3) and OPA is toxic from 2.5 to 10 mM (EC50: 4.2 mM ± 0.5). Only 1,4-NQ and OPA affected cell parameters (migration, motility, motility speed and optical volume). Furthermore, 1,4-NQ is the most toxic by-product of naphthalene, with an EC50 value that was one hundred times higher than those of the other compounds. RTCA and Holomonitor analysis showed a complementarity when studying the toxicity induced by chemicals.

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New method to determination of naphthalene in ambient air using cold fiber-solid phase microextraction and gas chromatography–mass spectrometry

Cited by 19 publications

References 34 publications

Growth of Pentacene Crystals by Naphthalene Flux Method

Growth of Pentacene Crystals by Naphthalene Flux Method

Exposure Chambers for Studying the Partitioning of Atmospheric PAHs in Environmental Compartments: Validation and Calibration Using Experimental and Computational Approaches

Evaluation of the Toxicity on Lung Cells of By-Products Present in Naphthalene Secondary Organic Aerosols

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