Skip to main content

Table 3 Melting points (Tm), crystal activities (axstal), solubilities (S(s)MeOH) and activity coefficients (γMeOH) in methanol. Methanol-PDMSe partition ratios (KPDMS/MeOH) and activity coefficients (γPDMS) in the PDMS for 12 PAHs

From: Determining the chemical activity of hydrophobic organic compounds in soil using polymer coated vials

Compound Tm a xstal a, b S(s)MeOH (± SD)b, c γMeOHd K PDMS/MeOH e γPDMSe, f
  K   mM M-1 LL-1 M-1
Nap 354 0.288 500 (± 23.5) 0.6 0.56 1.0
Ace 367 0.210 103.20 (± 0.82) 2.0 0.68 3.0
Flo 385 0.131 114.63 (± 2.41) 1.1 0.53 2.2
Phe 372 0.188 112.43 (± 6.51) 1.7 0.41 4.1
Ant 489 0.013 6.12 (± 0.13) 2.2 0.38 5.7
Flu 383 0.146 53.42 (± 5.05) 2.7 0.38 7.1
Pyr 425 0.058 31.64 (± 0.39) 1.8 0.49 3.8
BaA 433 0.047 10.37 (± 0.47) 4.6 0.30 15.0
Chr 529 0.005 0.70 (± 0.02) 7.8 0.29 27.1
BkF 489 0.013 1.49 (± 0.11) 8.9 0.27 32.6
BaP 454 0.029 3.49 (± 0.06) 8.4 0.30 27.9
Ind 435 0.045 1.64 (± 0.03) 27.6 0.33 83.5
aEquation 4        
bT = 298 K (25°C)        
cn = 3        
dγMeOH = axstalS(s)MeOH-1        
eSilastic® PDMS        
fEquation 3