Associations of Cognitive Function Scores with Carbon Dioxide, Ventilation, and Volatile Organic Compound Exposures in Office Workers: A Controlled Exposure Study of Green and Conventional Office Environments

http://dx.doi.org/10.1289/ehp.1510037



Table 3. Speciated VOC concentrations (μg/m3) on each study day, averaged across rooms.
Analyte Condition
Background Day 1
Green+
Day 2
Med. CO2
Day 3
High CO2
Day 4
Green
Day 5
Conventional
Day 6
Green+
Abbreviations: ND, non-detect; VOC, volatile organic compound.
VOCs
1,2,4-Trimethylbenzene 0.3 0.2 ND 0.1 ND 0.5 0.1
2-Butanone 2.5 0.7 0.7 0.8 1.1 1.1 0.6
2-Propanol 1.0 1.2 1.1 3.1 1.2 312.5 8.2
Acetone 12.0 14.7 9.6 8.7 20.0 20.0 8.6
Benzene 0.5 0.8 0.5 0.9 0.7 0.5 0.5
Carbon disulfide 0.6 0.2 ND ND ND ND 0.1
Carbon tetrachloride ND 0.2 0.4 ND 0.2 ND ND
Chloroform ND 0.1 ND ND ND 0.1 ND
Chloromethane 1.3 1.7 1.5 1.4 1.9 1.5 1.4
Cyclohexane 0.2 0.3 0.4 0.5 0.1 0.4 0.3
Dichlorodifluoromethane 2.5 2.6 2.9 2.7 2.9 2.4 2.5
Ethyl acetate ND ND ND ND 1.0 2.0 ND
Ethylbenzene 0.3 0.4 ND 0.3 0.2 0.1 0.1
Freon 113 0.3 0.7 0.8 0.8 0.8 0.2 0.4
Heptane ND 0.3 ND 0.3 ND 257.5 6.9
Hexane 0.4 0.7 0.5 0.7 0.4 0.8 1.3
m,p-Xylene 0.8 1.5 0.4 1.0 1.0 0.7 0.7
Methylene chloride 0.5 0.3 0.6 0.5 0.3 0.4 0.4
o-Xylene 0.3 0.4 ND 0.4 0.1 0.3 0.1
Styrene 0.1 ND ND ND ND ND 0.1
Tetrachloroethene 3.7 0.9 ND ND 0.9 0.6 0.2
Tetrahydrofuran ND ND ND ND 0.2 0.1 0.2
Toluene 2.4 2.1 1.4 1.9 2.2 1.9 2.9
trans-1,2-Dichloroethene 19.0 8.8 12.6 6.2 10.3 21.8 8.7
Trichloroethene ND ND ND ND ND ND 0.2
Trichlorofluoromethane 1.3 1.2 1.6 1.4 1.5 1.1 1.2
Grand total 50.0 40.1 35.0 31.4 46.9 626.4 45.6
Aldehydes
2,5-Dimethylbenzaldehyde ND ND ND ND ND ND ND
Acetaldehyde 1.0 3.7 3.2 3.1 5.4 7.3 2.1
Benzaldehyde ND ND ND ND ND 1.5 ND
Crotonaldehyde ND ND ND ND ND ND ND
Formaldehyde 2.4 5.9 5.5 5.4 8.9 11.7 4.4
Hexanaldehyde ND 0.8 0.8 ND 1.9 2.4 ND
Isovaleraldehyde ND ND ND ND ND ND ND
m,p-Tolualdehyde ND ND ND ND ND ND ND
n-Butyraldehyde 1.1 2.7 1.4 2.3 2.8 2.4 2.0
o-Tolualdehyde ND ND ND ND ND ND ND
Propionaldehyde ND 0.7 1.2 ND 1.4 1.6 0.6
Valeraldehyde ND ND ND ND ND ND ND
Glutaraldehyde ND 0.5 ND ND 0.4 ND ND
o-Phthalaldehyde ND 65.1 57.7 70.0 41.6 38.4 76.8
Grand total 4.6 79.4 69.8 80.9 62.4 65.3 85.8