1991
DOI: 10.1021/ac00013a030
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Helium-purged hollow fiber membrane mass spectrometer interface for continuous measurement of organic compounds in water

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Cited by 75 publications
(34 citation statements)
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“…Capillary and sheet polymer membranes, commonly silicones, are used in introduction systems that are of three basic types, (i) those that use a direct insertion membrane probe (DIMP), which places the membrane directly in the ion source (Bier & Cooks, 1987;Bier et al, 1990), (ii) those which employ pneumatic transport to carry the permeate from the membrane into the mass spectrometer (Slivon et al, 1991), and (iii) those in which a membrane``wall'' separates the ion source from a reaction vessel (Lauritsen & Lunding, 1998). Improved versions of each type continue to be described (Dejarme Bauer & Solyom, 1994;.…”
Section: A Introduction Systemsmentioning
confidence: 99%
“…Capillary and sheet polymer membranes, commonly silicones, are used in introduction systems that are of three basic types, (i) those that use a direct insertion membrane probe (DIMP), which places the membrane directly in the ion source (Bier & Cooks, 1987;Bier et al, 1990), (ii) those which employ pneumatic transport to carry the permeate from the membrane into the mass spectrometer (Slivon et al, 1991), and (iii) those in which a membrane``wall'' separates the ion source from a reaction vessel (Lauritsen & Lunding, 1998). Improved versions of each type continue to be described (Dejarme Bauer & Solyom, 1994;.…”
Section: A Introduction Systemsmentioning
confidence: 99%
“…The MIMS interface was constructed in-house in a 'flow-over' geometry as described previously [5]. The hollow fiber membrane was affixed to stainless steel hypodermic tubing (Vita Needle Inc., Needham, MA; 22 TW gauge, OD = 0.71 mm, ID = 0.51) and mounted within a 0.25 in.…”
Section: Membrane Interfacementioning
confidence: 99%
“…The membrane acts as a selective barrier which pre-concentrates hydrophobic penetrants and provides for on-line, real-time monitoring capability without the need for sample cleanup and chromatographic separation. Although there are a number of configurations for membrane inlet interfaces (e.g., flat sheets and capillary hollow fibers with sample flow through the fiber), we are particularly interested in a 'flow-over' design used by us and others [4,5]. In our applications, solutions are passed over the outer wall of the hollow fiber and hydrophobic analytes permeate through the PDMS into a sweep gas which is transported through the lumen to the mass spectrometer (Fig.…”
Section: Introductionmentioning
confidence: 99%
“…Ademais, com dispositivos adequados, a EPM permite, em uma única etapa, separar os componentes da matriz, concentrá-los e dirigí-los para o instrumento analítico, possibilitando determinações analíticas rápidas e monitoramento contínuo direto (on-line) 2 . A partir de 1974 3 as características de membranas tubulares vêm sendo exploradas, pois elas apresentam vantagens sobre as membranas planas para certas aplicações analíticas [4][5][6] . Apesar de três décadas de desenvolvimento de tecnologia de EPM existe pouca informação de seu uso em preparação de amostras para cromatografia gasosa (CG) 7 .…”
Section: Introductionunclassified