1.45 ppb (Zurich, Switzerland)[] 2-Butanone 9.8 0.9 ppb Industrial 11 ppb AIMS [] B 78-93-3 (Ottawa)[] solvent 0.76 ppb (Quinzhou)[] 1.35 ppb (avg from several Towns) [] 0.2 ppb (Zurich, Switzerland)[] 0.5 ppb (Niterói City, Brasil)[] 2-Pentanone 3.2 8 ppb AIMS [] B 107-87-9 16.6 0.36 ppb plants 0.7 ppb MCC-IMS A 6-methyl- (Rome)[] [] 110-93-0 0.65 ppb (Milan)[] 3-Buten-2-one 13.2 0.17 ppb (Hong oxidation of B 78-94-4 Kong)[] isoprene, 0.43 ppb vehicle (Nashville)[] exhaust 2,3 20 Food, kitchen B Butanedione waste 431-03-8 Acetaldehyde 98 9.4 ppb (Sao Ethanol fuel 500 ppb AIMS[] A 75-07-0 Paulo)[] combustion, 110 ppb bio-sniffer 2.4-45 ppb (Rio oxidation of [] de Janeiro)[] NMHCs 0.15 ppb 8.0 ppb chemiresistor (Quinzhou)[] (ZnO)[] 5.7 ppb 500 ppb CTL [] (Beijing)[] 3.6 ppb (Niterói City, Brasil)[] n-Propanal 15.4 0.4 ppb (Sao Disinfectant, 25 ppb AIMS [] A 123-38-6 Paulo)[] kitchen waste, 0.15 ppb 0.35 ppb vehicle chemiresistor (Quinzhou)[] exhaust (ZnO)[] 0.12 ppb 250 ppb CTL (Zurich, (ZrO2)[] Switzerland)[] 0.83 ppb (Niterói City, Brasil)[]
1.45 ppb (Zurich, Switzerland)[] 2-Butanone 78-93-3 9.8 0.9 ppb (Ottawa)[] 0.76 ppb (Quinzhou)[] 1.35 ppb (avg from several Towns) [] 0.2 ppb (Zurich, Switzerland)[] 0.5 ppb (Niterói City, Brasil)[] Industrial solvent 11 ppb AIMS [] B 2-Pentanone 107-87-9 3.2 8 ppb AIMS [] B 6-methyl- 110-93-0 16.6 0.36 ppb (Rome)[] 0.65 ppb (Milan)[] plants 0.7 ppb MCC-IMS [] A 3-Buten-2-one 78-94-4 13.2 0.17 ppb (Hong Kong)[] 0.43 ppb (Nashville)[] oxidation of isoprene, vehicle exhaust B 2,3 Butanedione 431-03-8 20 Food, kitchen waste B Acetaldehyde 75-07-0 98 9.4 ppb (Sao Paulo)[] 2.4-45 ppb (Rio de Janeiro)[] 8.0 ppb (Quinzhou)[] 5.7 ppb (Beijing)[] 3.6 ppb (Niterói City, Brasil)[] Ethanol fuel combustion, oxidation of NMHCs 500 ppb AIMS[] 110 ppb bio-sniffer [] 0.15 ppb chemiresistor (ZnO)[] 500 ppb CTL [] A n-Propanal 123-38-6 15.4 0.4 ppb (Sao Paulo)[] 0.35 ppb (Quinzhou)[] 0.12 ppb (Zurich, Switzerland)[] 0.83 ppb (Niterói City, Brasil)[] Disinfectant, kitchen waste, vehicle exhaust 25 ppb AIMS [] 0.15 ppb chemiresistor (ZnO)[] 250 ppb CTL (ZrO2)[] A