Methodological advances to improve repeatability of SOA generation in environmental chambers
Conference Year
January 2023
Abstract
Most laboratory atmospheric chamber studies examining properties of secondary organic aerosol (SOA) perform such experiments with mixing ratios of volatile organic compounds (VOCs) well-above atmospheric relevance (≳50 ppbv). When performing ozonolysis of biogenic VOCs at mixing ratios of atmospheric relevance (≲10 ppbv), repeatability of replicate experiments is hindered by the limitations of conventional VOC injection techniques. To overcome these limitations, two novel components were embedded in a conventional VOC injection setup. Implementation of these novel components has resulted in improvements in variability between replicate chamber experiments of up to a factor of 7 for all particle metrics
Primary Faculty Mentor Name
Giuseppe Petrucci
Status
Graduate
Student College
Graduate College
Program/Major
Chemistry
Primary Research Category
Physical Science
Methodological advances to improve repeatability of SOA generation in environmental chambers
Most laboratory atmospheric chamber studies examining properties of secondary organic aerosol (SOA) perform such experiments with mixing ratios of volatile organic compounds (VOCs) well-above atmospheric relevance (≳50 ppbv). When performing ozonolysis of biogenic VOCs at mixing ratios of atmospheric relevance (≲10 ppbv), repeatability of replicate experiments is hindered by the limitations of conventional VOC injection techniques. To overcome these limitations, two novel components were embedded in a conventional VOC injection setup. Implementation of these novel components has resulted in improvements in variability between replicate chamber experiments of up to a factor of 7 for all particle metrics