Publications by authors named "Chenshuo Ye"

Article Synopsis
  • Accurate identification and quantification of nitro-containing species are crucial for understanding their chemical behavior in the atmosphere, which this study investigates through different mass spectrometry techniques.
  • The research compared the performance of two ionization modes—HO (hydroxyl) and NO (nitric oxide)—in detecting various nitroaromatics and organonitrates, finding that each had unique strengths in sensitivity and fragmentation.
  • A calibration-based framework was developed to improve sensitivity estimation, revealing significant discrepancies in measurements and leading to enhanced accuracy in quantifying nitro compounds using I CIMS (iodide chemical ionization mass spectrometer).
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Anthropogenic pollutants can greatly mediate formation pathways and chemical compositions of secondary organic aerosol (SOA) in urban atmospheres. We investigated the molecular tracers for different types of SOA in PM under varying NO/NO conditions in Guangzhou using source analysis of particle-phase speciated organics obtained from an iodide chemical ionization mass spectrometer with a Filter Inlet for Gases and AEROsols (FIGAERO-I-CIMS). Results show that low-NO-like pathways (when NO/NO < 0.

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Nitrophenols, a class of important intermediate products from the oxidation of aromatics, can participate in photochemistry and influence the atmospheric oxidative capacity. However, the reported photolysis frequencies of nitrophenols show considerable discrepancies. Here, measurements of nitrophenol, and methyl nitrophenol using a proton-transfer-reaction time-of-flight mass spectrometer (PTR-ToF-MS) at both urban and regional sites in southern China are used to constrain photolysis frequencies of nitrophenols.

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Oxygenated volatile organic compounds (OVOCs) and secondary organic aerosol (SOA) formation potential of ambient air in Guangzhou, China was investigated using a field-deployed oxidation flow reactor (OFR). The OFR was used to mimic hours to weeks of atmospheric exposure to hydroxyl (OH) radicals within the 2-3 min residence time. A comprehensive investigation on the variation of VOCs and OVOCs as a function of OH exposure is shown.

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Isocyanic acid (HNCO) is a potentially toxic atmospheric pollutant, whose atmospheric concentrations are hypothesized to be linked to adverse health effects. An earlier model study estimated that concentrations of isocyanic acid in China are highest around the world. However, measurements of isocyanic acid in ambient air have not been available in China.

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