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Acceptable criteria for autosampler stability were accuracy values within 15% of the nominal concentrations (%DFN) and precision levels calculated as %RSD not exceeding 15%

EPA Air Sensor Toolbox: Evaluation of Emerging Air Sensor Performance AQ-SPEC evaluation of low-cost air quality sensors under ambient (field) and controlled (laboratory) conditions South Coast Air Quality Management Districts AQ SPEC Program Indoor uses of low-cost air pollution monitors What can I learn about indoor air quality from using a low-cost air pollutant monitor

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Most of those involved youth or young adult users. Few tobacco users are aware of these online tools, which means the number of people who experienced seizures during or after vaping could be higher