Related Experiment Video
Updated: Jan 16, 2026

Split Point Analysis and Uncertainty Quantification of Thermal-Optical Organic/Elemental Carbon Measurements
Published on: September 7, 2019
Characterization, sources and reactivity of carbonyl volatile organic compounds in North China: Based on long-term
Ziyan Chen1, Kaitao Chen1, Xingru Li1
1Analysis and Testing Center, Department of Chemistry, Capital Normal University, Beijing 100048, China.
Abstract:
Carbonyl compounds play a pivotal role in the formation of secondary pollutants such as O3 and SOA, significantly impacting air quality and human health. This study extended the observation period compared to previous research, providing a long-term perspective on carbonyl compound variations and their environmental implications. Atmospheric observations were conducted at Beijing (BJ) and Xianghe (XH) during the summer and winter months of 2018, 2019, and 2023 to study the sources and impacts of carbonyl compounds in typical urban areas and peri‑urban areas. Notably, concentrations in the summer of 2023 increased compared to 2018 and 2019. The predominant carbonyl compounds-formaldehyde, acetaldehyde, and acetone-accounted for over 60 % of the total. The mean values of OFP in BJ ranged from 18.55 to 58.61 µg/m3, lower than those in XH (29.82 to 65.48 µg/m3), with formaldehyde and acetaldehyde contributing over 80 % of the total. SOAP exhibited a similar pattern, with values in XH (69.21 to 508.55 µg/m3) significantly exceeding those in BJ (34.47 to 159.78 µg/m3). The PMF model highlighted vehicle exhaust, secondary pollution, and biomass combustion as major sources of carbonyl compounds, emphasizing differences in source contributions between the two regions. This study's comparative analysis over different years and locations provides new insights into the dynamic changes in carbonyl compounds and their environmental importance. These results not only reinforce the importance of carbonyl compounds regulation but also offer a valuable reference for evaluating and refining emission control strategies during this period.
More Related Videos
Related Concept Videos
Structures of Aldehydes and Ketones
In aldehydes (Figures 1a and 1b), the...
Spectroscopy of Carboxylic Acid Derivatives
Combustion Energy: A Measure of Stability in Alkanes and Cycloalkanes
Alkanes undergo combustion in the presence of excess oxygen and high-temperature conditions to give carbon dioxide and water. A combustion reaction is the energy source in natural gas, liquified...
Relative Reactivity of Carboxylic Acid Derivatives
A key factor in assessing the reactivity of the acid derivatives is the basicity of the substituent or the leaving group. The lower the basicity of the leaving group, the higher the reactivity of the derivative. The basicity of the leaving group follows this order:
Halide ions < Acyloxy ions < Alkoxy ions < Amine ions
Reactivity of Enolate Ions
Chemical Factors Affecting Respiration Centers
CO2 has a potent influence on respiration and is strictly regulated....

