Table 1 The detailed information for the 14 odorants [5, 12]
Odorants | Abbreviations | Structures | CAS | MW a | LogKow b | OTC c (µg/L) | Odor descriptors | Concentrations in finished water (ng/L) | Detection frequency (%) | |
|---|---|---|---|---|---|---|---|---|---|---|
Terpene | 2-Methylisoborneol | 2-MIB |
| 2371–42-8 | 168.18 | 3.31 | 0.010 | Musty/earthy | n.d.-576 | 36 |
Geosmin | GSM |
| 19700–21-1 | 182.30 | 3.57 | 0.004 | Musty/earthy | n.d.-10 | 50 | |
Pyrazine | 2-Isobutyl-3-methoxy pyrazine | IBMP |
| 24683–00-9 | 166.22 | 2.86 | 0.002 | Musty/earthy | n.d.-0.02 | 2.2 |
Ether | Bis(2-Chloro-1-methylethyl) ether | DCIP |
| 108–60-1 | 171.07 | 1.47 | 0.197 | Chemical/solvent-like | n.d.-1191 | 36 |
Thioether | Dimethyl disulfide | DMDS |
| 624–92-0 | 94.20 | 1.87 | 0.030 | Swampy/septic | n.d.-8.7 | 45 |
Dimethyl trisulfide | DMTS |
| 3658–80-8 | 126.25 | 1.87 | 0.010 | Swampy/septic | n.d.-3.3 | 25 | |
Cyclic acetal | 2-Ethyl-4-methyl-1,3-dioxolane | 2E4MDL |
| 4359–46-0 | 116.16 | 1.02 | 0.005 – 0.884 | Solvent-like/sweet | n.d.-40.5 | 11 |
Aldehyde | Hexanal | – |
| 66–25-1 | 100.16 | 1.80 | 0.3 – 14 | Grassy/fatty | n.d.-243 | 79 |
|  | Heptanal | – |
| 111–71-7 | 114.19 | 2.29 | 3 | Fishy/fatty | n.d.-578 | 42 |
|  | Benzaldehyde | – |
| 100–52-7 | 106.12 | 1.71 | 4.5 | Bitter almond | n.d.-592 | 92 |
|  | 2-Octenal | – |
| 2548–87-0 | 126.20 | 2.57 | 3 | Fishy | n.d.-34.5 | 1.4 |
|  | Decanal | – |
| 112–31-2 | 156.26 | 3.76 | 0.8 | Fruity | n.d.-153 | 35 |
|  | β-Cyclocitral | – |
| 432–25-7 | 152.23 | 3.44 | 19.3 | Grassy/sweet-tobacco | n.d.-57.4 | 32 |
|  | Undecanal | – |
| 112–44-7 | 170.29 | 4.25 | 0.55 | Fatty/fruity | 800 | – |
