A study of organic compound pervaporation through silicone rubber

Watson, Jason M.; Payne, P.A.

doi:10.1016/s0376-7388(00)80786-3

Cited by 123 publications

(55 citation statements)

References 26 publications

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“…30 The second step of diffusion through the membrane is known to be the rate-determining process, whereas partitioning at the high-pressure surface and desorption from the low-pressure surface are considered to be instantaneous. 31 Thus, the permeation process across the membrane delays the response of the mass spectrometer to the analyte present in the sample.…”

Section: Resultsmentioning

confidence: 99%

Characterization of a Membrane Interface for Analysis of Air Samples Using Time-of-flight Mass Spectrometry

Jang¹,

Oh²,

Park³

et al. 2010

Bulletin of the Korean Chemical Society

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In the present study, we constructed a membrane inlet assembly for selective permeation of volatile airborne organic compounds for subsequent analysis by time-of-flight mass spectrometry. The time-dependent diffusion of analytes through a 75 µm thick polydimethylsiloxane membrane was measured by monitoring the ion signal after a step change in the sample concentration. The results fit well to a non-steady-state permeation equation. The diffusion coefficient, response time, and sensitivity were determined experimentally for a range of polar (halogenated) and nonpolar (aromatic) compounds. We found that the response times for several volatile organic compounds were greatly influenced by the alkyl chain length as well as the size of the substituted halogen atoms. The detection limits for benzene, ethylbenzene, and 2-propanol were 0.2 ppm, 0.1 ppm, and 3.0 ppm by volume, respectively, with a linear dynamic range greater than three orders of magnitude. These results indicate that the membrane inlet/time-of-flight mass spectrometry technique will be useful for a wide range of applications, particularly for in situ environmental monitoring.

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Section: Resultsmentioning

confidence: 99%

Characterization of a Membrane Interface for Analysis of Air Samples Using Time-of-flight Mass Spectrometry

Jang¹,

Oh²,

Park³

et al. 2010

Bulletin of the Korean Chemical Society

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“…The separation factor (α) was shown to rise monotonically with alcohol chain length (Watson, 1990), as shown in Table A Table A-5. The solubility factor (A) in Table 5 is based on the Scatchard-Hildebrand activity-solubility equation (Hildebrand, 1970), which allows the development of a relationship for the partition coefficient, P, of component i, between an aqueous solution (w) and a membrane (m), as defined in Eq.…”

Section: Solubilitymentioning

confidence: 97%

“…The separation factor can also be written in terms of the permeabilities of the two penetrants and the relative partial pressure driving forces (Ashworth, 1992;Koros, 1993;Stern, 1994): Written in this manner, the separation factor can be seen to have contributions derived from penetrant solubility (S A /S B ) and penetrant mobility (D A /D B ). Selective solubility is the controlling factor in processes involving the separation of vapors from gases, such as VOC removal from air (Baker, 1987;Watson, 1990;Lund, 1996;Deng, 1998). The motion of polymer segments in the membrane controls mobility selectivity.…”

Section: Membrane Transportmentioning

confidence: 99%

“…A-11 Watson and Payne (1990) evaluated the separation factor and permeability of silicone rubber membranes (0.2 mm thickness) for n-alcohols (C 1 -C 10 ) and a variety of other organic compounds in dilute aqueous solutions using pervaporation. The separation factor (α) was shown to rise monotonically with alcohol chain length (Watson, 1990), as shown in Table A Table A-5.…”

Section: Solubilitymentioning

confidence: 99%

“…However, studies of gas-liquid pervaporation systems indicate that as organic concentration increases in the aqueous feed phase, the separation factor falls dramatically for silicone rubber membranes (Seok, 1987;Ishihara, 1986;Leeper, 1987). The separation factor has also been found to decrease with increasing aqueous phase concentration of the solute until a limiting value is reached for a wide variety of organic compounds ( Zhu, 1983;Watson, 1990, Seok, 1987). …”

Section: Operating Conditionsmentioning

confidence: 99%

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Membrane-Mediated Extraction and Biodegradation of Volatile Organic Compounds From Air

Peretti¹,

Shepherd²,

Clayton³

et al. 2005

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Improved measurement device for vapor permeation and pervaporation

Ying-jun

Honnma

Ito

1997

J. Appl. Polym. Sci.

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A precision measurement method of vapor permeability through polymer membranes was developed and tested for cellulose acetate membranes. An apparatus with a differential transformer and a float on the liquid source could precisely measure the vapor permeation rate as well as pervaporation flux by sensing the level of the source liquid. The permeation rates with vapor feed and liquid feed of water, alcohols, and organic solvents were measured for silicone rubber and cellulose acetate, cellulose triacetate, and water-soluble cellulose acetate membranes. The measured vapor permeability directly predicted the pervaporation flux through silicone rubber. In the case of swollen material due to the feed liquid, the vapor permeability was not a controlling property of the pervaporation flux, but became an analysis base for it.

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A study of organic compound pervaporation through silicone rubber

Cited by 123 publications

References 26 publications

Characterization of a Membrane Interface for Analysis of Air Samples Using Time-of-flight Mass Spectrometry

Characterization of a Membrane Interface for Analysis of Air Samples Using Time-of-flight Mass Spectrometry

Membrane-Mediated Extraction and Biodegradation of Volatile Organic Compounds From Air

Improved measurement device for vapor permeation and pervaporation

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