Samples of ambient volatile organic compounds (VOCs) were collected using SUMMA canisters at three Country Control Sites in Shijiazhuang during the spring of 2019, 2021, and 2022, which were detected using gas chromatography/mass spectrometry (GC/MS). To investigate the characteristics and temporal variations of VOCs mass concentration levels, the online monitoring data of ozone (O
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Yu et al. (2024) studied this question.
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