Physico-chemical characterization and source tracking of black carbon at a suburban site in Beijing

Wang, Hailin; Liú, Dan; Gao, Meiping; Wang, Minyan; Hao, Zhengping

doi:10.1016/j.jes.2015.05.001

Cited by 15 publications

(7 citation statements)

References 36 publications

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“…On the other hand, due to the highly complex sources of soot, reliable methods for its identification are still lacking. The currently available methods include transmission electron microscopy, − thermal-optical methods, − and optical methods . However, these techniques give only little chemical information for identification.…”

Section: Introductionmentioning

confidence: 99%

Identification, Quantification, and Imaging of the Biodistribution of Soot Particles by Mass Spectral Fingerprinting

et al. 2021

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Soot is ubiquitous and has large detrimental effects on climate, air quality, and human health. However, identification of soot in carbonaceous media is very challenging due to its nanoscale carbon nature and complex sources. Due to the shortage in the methodology, until now, the fate and health effect of soot particles after inhalation are still poorly understood. Here, we report a new method for label-free identification, quantification, and imaging of soot particles in complex media based on laser desorption/ionization mass spectrometry fingerprinting. We found that soot particles from different origins and with different morphologies showed highly consistent mass spectral fingerprints deriving from peak ratios of small carbon cluster anions (C2 ––C10 –), which enabled both accurate quantification of soot in fine particulate matter (PM2.5) samples and label-free imaging of soot particles in biological media. By using this technique, we tracked and imaged the suborgan distribution of soot particles in mice after exposure to PM2.5. The results showed that the lung is the main target organ for short-term inhalation exposure to soot particles. This study helps to better understand the inhalation toxicology of soot and also provides a practical novel methodological platform for identification, tracing, and toxicological studies of elemental carbon-based nanomaterials.

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Section: Introductionmentioning

confidence: 99%

Identification, Quantification, and Imaging of the Biodistribution of Soot Particles by Mass Spectral Fingerprinting

et al. 2021

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“…Accordingly, the conductivity of SBR/HCB is higher than that of SBR/ N330. As mentioned in the literature, 19 there is a correlation between the structure of carbon black as characterised by DBP absorption value and the thermal conductivity: the thermal conductivity of high structure carbon black is higher than that of low structure carbon black. The electric furnace black has a high structure and high electric conductivity, but its thermal conductivity is not high because of the porous structure, which is heat insulating.…”

Section: Electrical Conductivitymentioning

confidence: 83%

Structure and properties of hollow carbon black and filled rubber nanocomposites

Yao

et al. 2013

Plastics, Rubber and Composites

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Hollow carbon black (HCB) is introduced in this work. It has a special hollow structure, high specific surface area, high structure and high electric conductivity. Hollow carbon black is used to fill styrene-butadiene rubber (SBR). The bound rubber test results show that the bound rubber of SBR/HCB can be measured when the HCB content reaches 25 phr because a strong filler network is formed, which indicates good electric conductivity of SBR/HCB. In comparison, the bound rubber of SBR/N330 can not be measured even when the N330 content is 40 phr. The mechanical measurements show that HCB has very good reinforcing effect on SBR especially when the filler content is low. The electric conductivity and thermal conductivity increase with the increase in filler content. At the same filler content, the properties of SBR/HCB nanocomposites are better than those of SBR/N330 nanocomposites, which suggests that HCB has good application potential.

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“…Especially, the use of the imaging technique greatly improved the sensitivity and precision of analysis. The conventional methods were inferior in the aspects of quantification, sample pretreatment, and analytical precision. − It is worth noting that most previous studies about soot in aerosol samples focused on the temporal and spatial pollution characteristics in different regions or cities, ,, but the size-dependent occurrence characteristics of soot were scarcely reported.…”

Section: Resultsmentioning

confidence: 99%

Mass Spectrometry Imaging Strategy for In Situ Quantification of Soot in Size-Segregated Air Samples

Min

Lin

et al. 2022

Anal. Chem.

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Soot, mainly derived from incomplete combustion of fossil fuel and biomass, exists ubiquitously in different environmental matrixes. To study the detrimental effects of soot on climate, air quality, and human health, accurate quantification of soot is an important prerequisite. However, until now, quantification of soot in environmental media, especially in carbonaceous media, is still very challenging. Here, we report a matrix-free laser desorption/ionization mass spectrometry (LDI-MS) method for in situ imaging of soot particles in size-segregated aerosol samples collected on filter membranes. A series of round-shaped sample spots in filter membranes were selected and subjected to MS imaging analysis, enabling direct in situ quantification of soot without solvent extraction or separation. Especially, the MS imaging with serial sample spots can overcome the problems of sweet-spot in LDI-MS and inhomogeneous distribution of soot in the filter membrane, thus greatly improving the precision of quantification. The limit of detection of soot was 4 ng/m 2 and the recovery was 84.4−126%. By using this method, we found that a higher soot content was present in larger-sized particulate matter than smaller-sized particles, suggesting that aerosol soot was mainly derived from primary emission sources. Furthermore, this method also shows the potential to analyze nitrate and sulfate species in PM 2.5 . To the best of our knowledge, it is the first method capable of simultaneous analysis of inorganic salts and soot in air samples. It represents a novel strategy for in situ quantification of aerosol soot with the advantages of high specificity, high sensitivity, separation-, solvent-and matrix-free.

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Physico-chemical characterization and source tracking of black carbon at a suburban site in Beijing

Cited by 15 publications

References 36 publications

Identification, Quantification, and Imaging of the Biodistribution of Soot Particles by Mass Spectral Fingerprinting

Identification, Quantification, and Imaging of the Biodistribution of Soot Particles by Mass Spectral Fingerprinting

Structure and properties of hollow carbon black and filled rubber nanocomposites

Mass Spectrometry Imaging Strategy for In Situ Quantification of Soot in Size-Segregated Air Samples

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