Abraham model in gas chromatography of phenol pollutants

Determination of Solubilities and n-Octanol/Water Partition Coefficients and QSPR Study for Substituted Phenols

“…Meanwhile the environmental hazards of phenolic compounds have led to wide concern by researchers, and many works have been done for their QSPR/QSAR models in recent years (Yao et al 2005;Lu et al 2007). For example, Urbanczyk et al (2002) predicted the gas chromatogrphic retention time, retention index and the correction coefficient for substituted phenols by Abraham model. On the other hand, Loader et al (2006) established QSAR model of biotoxin for alkyl phenols based on theoretic bond length and electronic density, and Gao et al (2002) reported QSPR model for lgK ow of substituted phenols.…”

Direct Acetylation and Determination of Chlorophenols in Aqueous Samples by Gas Chromatography Coupled with an Electron-Capture Detector

“…Acetylation of the chlorophenols was carried out to reduce the polarity and increase the volatility inside the GC column (Figure 1). The formation of phenolate in solution requires an alkaline pH because the pKa value of 2-CP is 8.3 (see Table I) (20)(21)(22). The optimum pH for acetylation has been obtained at pH ¼ 9 + 1, depending on the pKa for each chlorophenol.…”

Analysis of the Detection of Organophosphate Pesticides in Aqueous Solutions Using Hydrogen-Bond Acidic Coating on SH-SAW Devices

“…Similarly, the oxygen atom (a highly electronegative atom) in paraoxon makes it more soluble in water than parathion-methyl and parathion, respectively. It is noted that measurements of the analyte/coating partition coefficient using similar methods described in 30,34 will provide further insight into the nature of the analyte/coating interaction.…”