Table 1.
Master Mix Compounds and Their Properties Relevant to HS Analysis15
| compounds | boiling point (°C) | volatility | vapor pressure at 25 °C (mmHg) | IARCa classification |
|---|---|---|---|---|
| phenol | 182 | volatile | 3.50 × 10−01 | Group 3 |
| 2,4,6-trichlorophenol (2,4,6-TCP) | 246 | volatile | 8.00 × 10−03 | Group 2B |
| pentachlorophenol (PCP) | 310 | semivolatile | 1.10 × 10−04 | Group 2B |
| dibutyl phthalate (DBP) | 340 | semivolatile | 2.00 × 10−05 | Group 3 |
| benzyl butyl phthalate (BBP) | 370 | semivolatile | 8.25 × 10−06 | Group 3 |
| di-ethylhexyl phthalate (DEHP) | 384 | semivolatile | 1.42 × 10−07 | Group 2B |
| naphthalene (NA) | 218 | volatile | 8.50 × 10−02 | Group 2B |
| phenanthrene (PA) | 340 | semivolatile | 1.21 × 10−04 | Group 3 |
| pyrene (PY) | 404 | semivolatile | 4.50 × 10−06 | Group 3 |
| benzo[a] pyrene (BaP) | 495 | semivolatile | 5.49 × 10−09 | Group 1 |
a
The International Agency for Research on Cancer (IARC) classifies substances to show whether they are suspected to cause cancer or not. It places the substances into four categories depending on the strength of evidence for their carcinogenicity. The categories are as follows: Group 1, carcinogenic to humans; Group 2A, probably carcinogenic to humans; Group 2B, possibly carcinogenic to humans; and Group 3, not classifiable as to its carcinogenicity to humans.16–18