Methodological advances to improve repeatability of SOA generation in environmental chambers

Presenter's Name(s)

Austin Flueckiger

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

Abstract only.

Share

COinS
 

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