Experiences with the use of DSC in the determination of vapor pressure of organic compounds

Experimental determination of the (vapor + liquid) equilibrium data of binary mixtures of fatty acids by differential scanning calorimetry

“…It was observed by other authors [5][6][7]9,16] that the hole size influences the form of the thermograms and the quality of the obtained results. The authors of this work have conducted several experiments for different hole sizes and have seen that it can be achieved a better reproducibility of the measured temperatures when the hole size was 0.25 mm in all of the conducted experiments.…”

“…Dynamic methods [6] to measure the vapor pressure have been used since the beginning of this century. Ebulliometry has been, and still is, an important technique for these determinations, providing highly accurate data [5].…”

Extension of the DSC method to measuring vapor pressures of narrow boiling range oil cuts

“…This adaptation was first used by Farritor and Tao [19]. Table 1 presents a summary of studies [14,15,17,18,[20][21][22][23][24][25][26][27][28][29][30][31][32] which have used the DSC technique for vapor pressure measurements. It contains a list of compounds studied, measurement conditions used (such as the heating rate, pinhole size and pressure range) and also major problems, notes and requirements selected from the original publications.…”

“…The ASTM task group [16] suggested a pressure range of 5-2000 kPa, a heating rate of 5 K min À1 , sample size of 1-5 mg for solids and 1-5 ml for liquids and a pinhole size smaller than 125 mm. It is worth mentioning that an alternative to the expensive laser drilled or pinched pinholes is a small metal ball over a larger hole [17,18], although this approach does usually require higher heating rates. This adaptation was first used by Farritor and Tao [19].…”

Vapor Pressures of Phenolic Compounds Found in Pyrolysis Oil

“…The vapor pressures of these compounds were measured using a high pressure differential scanning calorimeter. Additional information regarding the application of DSC for measuring vapor pressures is provided in references [24]- [26].…”