Determination of gas-liquid partition coefficients by means of gas chromatographic analysis

Vitenberg, A. G.; Ioffe, B. V.; Dimitrova, Z.St.; Butaeva, I.L.

doi:10.1016/s0021-9673(00)99964-3

Cited by 63 publications

(32 citation statements)

References 6 publications

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“…The situation is even worse for sulphides [2] and monoterpenes [22], which were found to scatter by a factor of 10 [23]. Furthermore, the equilibrium between the liquid and the gas phase may become perturbed when HS-samples are collected using a syringe [24]. Hence, accurate and temperature dependent measurements of HLCs have proven to be difficult and several methods have been developed in which, for example, the glass walls were silanized and the gas sampling was performed by pressing the gas phase into a stainless steel tube containing Tenax as an adsorbent [25].…”

Section: Instrumental Approaches For Measuring Henry's Law Constantsmentioning

confidence: 99%

Temperature dependence of Henry's law constants: An automated, high-throughput gas stripping cell design coupled to PTR-ToF-MS

Wieland

Neff

Gloess

et al. 2015

International Journal of Mass Spectrometry

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a b s t r a c tLiquid-air partition coefficients (Henry's law constants, HLCs) of eight flavour compounds (volatile organic compounds, VOCs) were determined in water, over a temperature range of 4 • C to 85 • C. The HLCs were derived by using nitrogen to strip a dilute solution of a VOC and then determining the decrease in concentration of the VOC in real-time in the stripped gas using proton-transfer-reaction time-of-flight mass-spectrometry (PTR-ToF-MS). This approach provided HLCs of improved accuracy (small 95% standard deviation) over a large temperature range, especially for low volatility VOCs (HLC > 2 mol/(m 3 Pa)). The outstanding features of this approach are: (i) it is applicable for VOCs over a large range of volatility; (ii) it can be used over a wide temperature range (4 • C to 85 • C); (iii) it is automated (high-throughput); (iv) it does not require calibration or knowledge of the initial concentration of the analyte; and (v) the experimental temperature can be controlled very precisely ( T better than ±0.1 • C). The eight flavour compounds analysed in water were: (E)-␤-damascenone, 2,3-butanedione, 2-ethyl-3,5-dimethylpyrazine, 2-methylfuran, 3-methylbutanal, acetaldehyde, ethyl-3-methyl butanoate and guaiacol. Based on the measured HLCs at five fixed temperatures (4 • C, 25 • C, 45 • C, 65 • C and 85 • C), accurate non-linear analytical expressions for the temperature dependence of HLCs were derived, which were then used to calculate thermodynamic constants.

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Section: Instrumental Approaches For Measuring Henry's Law Constantsmentioning

confidence: 99%

Temperature dependence of Henry's law constants: An automated, high-throughput gas stripping cell design coupled to PTR-ToF-MS

Wieland

Neff

Gloess

et al. 2015

International Journal of Mass Spectrometry

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“…However, as a result using a lab scale scrubber, that the L/G ratios were adjusted from 0.55 to 9.75 L/m 3 , NaOH and NaOCl were injected as additives, as conducted by Couvert et al, and the REs of H 2 S and CH 3 SH were above 99% and 96%, respectively [51]. The solubility of sulfur compounds (H 2 S, CH 3 SH, (CH 3 ) 2 S and (CH 3 ) 2 S 2 ) in water obtained by previous studies is almost the same as 101 P/kPa at 298-313 K [52][53][54][55][56]. Accordingly, when various sulfur compounds remains as trace levels (several tens to hundreds ppb) after an EB treatment, it would be efficiently controlled by the CFS.…”

Section: Cfsmentioning

confidence: 75%

Decomposition of sulfur compounds by a radiolysis: III. A hybrid system and field application

Son

Jung

Lee

et al. 2015

Chemical Engineering Journal

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“…The literature discloses different data for DMS volatility in an aqueous solution and at infinite dilution as follows: Owing to the particular meaning of DMS for climate balance, as well as for fauna, several publications consider DMS volatility in seawater at a temperature from 0 to about 40 °C . Further values can be found for trials with CDTA (cyclohexandiaminetetraacetic) and CDTA‐Fe(II) solution . The broadest areas are measurements of DMS in aqueous solutions . This is particularly due to the high relevance for the petrochemical sector, where DMS is used during refining and thus has to be removed later on. Regarding the brewing industry, two authors offer work dealing with the DMS problematic . …”

Section: Resultsmentioning

confidence: 99%

Evaporation behaviour of DMS in an aqueous solution at infinite dilution - a review

et al. 2016

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The current article describes the evaporation behaviour of dimethyl sulfide (DMS) in wort. All thermodynamic and technological basics and DMS data are listed. However, the article's target was not just the collection, editing and reviewing of information but also how to predict DMS evaporation behaviour from wort for different temperatures based on the data in the literature. For that particular purpose, a function was first set up that combined all of the information available on evaporation behaviour. In this context, the so‐called activity coefficient (γi) is of crucial interest. Owing to the broad basis of literature evaluated, the function set‐up as described can be deemed to be a current and accurate tool for predicting DMS evaporation behaviour, in general, as well as in particular for different boiling systems. Copyright © 2016 The Institute of Brewing & Distilling

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Determination of gas-liquid partition coefficients by means of gas chromatographic analysis

Cited by 63 publications

References 6 publications

Temperature dependence of Henry's law constants: An automated, high-throughput gas stripping cell design coupled to PTR-ToF-MS

Temperature dependence of Henry's law constants: An automated, high-throughput gas stripping cell design coupled to PTR-ToF-MS

Decomposition of sulfur compounds by a radiolysis: III. A hybrid system and field application

Evaporation behaviour of DMS in an aqueous solution at infinite dilution - a review

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