2007
DOI: 10.1897/06-339r.1
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Using an internal standard method to determine Henry's law constants

Abstract: An internal standard method is developed for the measurement of thermodynamic Henry's law constants (H). In this method, a mixture of the analytes and an internal standard is prepared and used to make a standard solution (organic solvent) and a dilute aqueous solution. Both the standard solution and the headspace samples above the aqueous solution at partitioning equilibrium in closed containers are subject to gas chromatographic (GC) analysis. Subsequently, the values of H for the analytes can be calculated f… Show more

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Cited by 16 publications
(23 citation statements)
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“…While for furans no literature data are available and data for furfural [14,15] and allyl alcohol [18] are rather scarce (two and three c 1 1 data points, respectively), for methyl vinyl ketone more numerous K aw values were reported at several temperatures in two studies [16,17]. Unfortunately, these literature data for methyl vinyl ketone differ greatly (in some cases even by a factor of two) both each other and when compared to our K aw measurements, the literature K aw ðTÞ dependences being in addition inconsistent with calorimetric data obtained in this work.…”
Section: Data On Dilute Aqueous Solutionsmentioning
confidence: 99%
“…While for furans no literature data are available and data for furfural [14,15] and allyl alcohol [18] are rather scarce (two and three c 1 1 data points, respectively), for methyl vinyl ketone more numerous K aw values were reported at several temperatures in two studies [16,17]. Unfortunately, these literature data for methyl vinyl ketone differ greatly (in some cases even by a factor of two) both each other and when compared to our K aw measurements, the literature K aw ðTÞ dependences being in addition inconsistent with calorimetric data obtained in this work.…”
Section: Data On Dilute Aqueous Solutionsmentioning
confidence: 99%
“…Furthermore, Henry's law constant may be experimentally determined, where dynamic methods (e.g. inert gas stripping method) [19,20] and static equilibration techniques [21,22] are described in literature.…”
Section: Henry's Lawmentioning
confidence: 99%
“…The detailed derivation can be found in the literature. 7 The exact knowledge of the substrate concentrations, the GC injection volumes, as well as the gas and the liquid phase volumes in the closed system is not required in this approach, which gives it advantages over previously reported methods. The limitation of this method is that it only works for compounds having low k H values, and the accuracy of k H,A is dependent upon that of k H,I .…”
Section: Theorymentioning
confidence: 99%
“…5,10 In the present paper, we report the experimental determination of the apparent dimensionless Henry's law constant k H for a series of aromatic aldehydes and ketones by using the recently developed internal standard method. 7 The approach is elegantly simple as the knowledge of many experimental variables is not required and random errors such as those associated with gas chromatographic (GC) injection volumes can be minimized. The technique works well for both liquid and solid compounds that have k H values in the order of 10 -6 to 10 -3 .…”
Section: Introductionmentioning
confidence: 99%