Determination of Henry's law constants of phenols by pervaporation-flow injection analysis.
A novel dynamic nonequilibrium technique for the determination of Henry's law constant (HLC) of phenols based on pervaporation-flow injection (PFI) is described. A linear relationship between HLC and the amount of phenol measured by a detector in the acceptor line of a PFI system was demonstrated. This relationship was constructed using five frequently encountered phenols (phenol, 2,4-dimethylphenol, 2,4-dichlorophenol, 2-chlorophenol, and 2,3-dimethylphenol) and used for the determination of the HLC of three other phenols (2,4,6-trichlorophenol, 2-methylphenol, and 3-methylphenol). The HLC of all eight phenols were also determined by the single equilibrium static technique (SEST). Fairly good agreementwas observed between both techniques regarding the HLC of 2,4,6-trichlorophenol, 2-methylphenol, and 3-methylphenol. On the basis of the results obtained, it was concluded that the PFI technique offers considerable advantages over SEST in terms of precision, speed, labor intensity, and possibilities for automation.
Sheikheldin
S Y
SY
Department of Chemistry, La Trobe University, Bundoora, Victoria, Australia.
Cardwell
T J
TJ
Cattrall
R W
RW
Luque de Castro
M D
MD
Kolev
S D
SD
D000388:Air; D017022:Flow Injection Analysis / Q000295:instrumentation / Q000379:methods* / Q000706:statistics & numerical data; D008956:Models, Chemical; D010636:Phenols / Q000032:analysis*; D013816:Thermodynamics; D014867:Water; D014874:Water Pollutants, Chemical / Q000032:analysis*
D010636:Phenols; D014874:Water Pollutants, Chemical; D014867:Water