Table 2.
Mean concentration values of selected VOCs released from individual office devices
| No. | Volatile organic compounds | Mean chamber concentrations in μg m−3 (±standard deviation) | ||||||
|---|---|---|---|---|---|---|---|---|
| Device A | Device B | Device C | Device D | Device E | Device F | Device G | ||
| 1 | Benzene | 1.15 (±0.14) | 3.21 (±0.40) | 4.04 (±0.51) | 10.99 (±1.4) | 16.9 (±2.2) | 23.1 (±3.0) | 31.7 (±4.1) |
| 2 | Trichloroethylene | 2.01 (±0.29) | 2.00 (±0.29) | 1.49 (±0.22) | nd | nd | nd | nd |
| 3 | Toluene | 7.3 (±1.1) | 37.7 (±5.7) | 26.6 (±4.0) | 7.65 (±1.2) | 7.8 (±1.2) | 3.53 (±0.55) | 5.05 (±0.79) |
| 4 | Tetrachloroethylene | 0.43 (±0.52) | 1.65 (±0.20) | 3.89 (±0.47) | 2.55 (±0.31) | 0.592 (±0.072) | 0.245 (±0.030) | 0.503 (±0.061) |
| 5 | Butyl acetate | 10.3 (±1.7) | 5.51 (±0.89) | nd | 2.48 (±0.40) | nd | nd | nd |
| 6 | Chlorobenzene | 3.68 (±0.46) | 3.83 (±0.48) | 0.607 (±0.076) | 0.331 (±0.041) | 6.48 (±0.81) | 1.09 (±0.14) | 2.31 (±0.29) |
| 7 | Ethylbenzene | 7.4 (±1.0) | 8.9 (±1.2) | 15.1 (±2.0) | 41.3 (±5.5) | 20.4 (±2.7) | 20.01 (±2.7) | 20.6 (±2.8) |
| 8 | Xylenes | 40.5 (±6.2) | 2.72 (±0.41) | 25.6 (±3.7) | 34.0 (±4.9) | 29.9 (±4.4) | 24.5 (±3.6) | 30.7 (±4.5) |
| 9 | Styrene | 9.7 (±1.3) | 26.1 (±3.6) | 2.69 (±0.36) | 33.7 (±4.5) | 30.1 (±4.0) | nd | nd |
| 10 | Trimethylbenzene | 45.6 (±7.1) | 12.5 (±1.9) | 24.9 (±3.9) | 18.8 (±2.9) | 20.78 (±3.2) | 16.1 (±2.5) | 8.3 (±1.3) |
| 11 | α-Methylstyrene | nd | nd | nd | 489 (±76) | 690 (±110) | 106 (±17) | 208 (±44) |
| 12 | Butylcyclohexane | nd | nd | nd | 78 (±12) | nd | nd | nd |
| 13 | 1,4-Dichlorobenzene | 0.233 (±0.032) | 0.514 (±0.070) | 0.347 (±0.048) | 0.702 (±0.097) | nd | 0.153 (±0.021) | 0.181 (±0.025) |
| 14 | 1,2-Dichlorobenzene | nd | 0.437 (±0.057) | 0.085 (±0.012) | nd | nd | nd | nd |
| 15 | Decamethylcyclopentasiloxane | 33.7 (±5.3) | 62.0 (±9.7) | 67 (±11) | 59.9 (±9.4) | 47.4 (±7.4) | 55.5 (±8.7) | 28.1 (±4.4) |
| 16 | 1,2,4-Trichlorobenzene | nd | 0.0167 (±0.0026) | nd | 4.85 (±0.63) | nd | 0.110 (±0.014) | nd |
| 17 | Naphtalene | 2.67 (±0.31) | nd | 5.52 (±0.65) | 33.0 (±3.7) | 2.54 (±0.30) | 1.07 (±0.13) | 1.15 (±0.14) |
| 18 | TVOC | 347 (±53) | 461 (±71) | 591 (±91) | 1235 (±190) | 660 (±100) | 424 (±65) | 416 (±64) |
| 19 | HVOC | 6.35 (±0.80) | 8.5 (±1.1) | 6.42 (±0.82) | 8.4 (±1.1) | 7.07 (±0.89) | 1.60 (±0.20) | 2.99 (±0.37) |
nd not detected, TVOC sum of concentrations of identified and unidentified volatile organic compounds eluting between and including the n-hexane and n-hexadecane (ISO 16000–9:2006), HVOC sum of halogenated volatile organic compounds