Quantification of Volatile Compounds in the Headspace of Aqueous Liguids Using Selected Ion Flow Tube Mass Spectrometry.

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Quantification of Volatile Compounds in the Headspace of Aqueous Liguids Using Selected Ion Flow Tube Mass Spectrometry.

Popis výsledku v původním jazyce

We describe a method by which the concentrations of volatile compounds in the headspace of their dilute aqueous solutions in sealed containers can be determined using on-line selected ion flow tube mass spectrometry, SIFT-MS. Thus, the changing number density of the molecules of the volatile compound in the carrier gas of the SIFT-MS instrument is described in terms of its changing flow rate as the pressure in the sealed container decreases during the sampling procedure. It is shown that the best analytical procedure is to determine the mean concentration of the trace gas in the liquid headspace over a given sampling time and relate this to the required concentration, which is the initial equilibrium concentration established before the pressure in thesealed container reduces significantly. The HenryŽs Law constants for these compounds have been determined and found to agree with the published values.

Název v anglickém jazyce

Quantification of Volatile Compounds in the Headspace of Aqueous Liguids Using Selected Ion Flow Tube Mass Spectrometry.

Popis výsledku anglicky

We describe a method by which the concentrations of volatile compounds in the headspace of their dilute aqueous solutions in sealed containers can be determined using on-line selected ion flow tube mass spectrometry, SIFT-MS. Thus, the changing number density of the molecules of the volatile compound in the carrier gas of the SIFT-MS instrument is described in terms of its changing flow rate as the pressure in the sealed container decreases during the sampling procedure. It is shown that the best analytical procedure is to determine the mean concentration of the trace gas in the liquid headspace over a given sampling time and relate this to the required concentration, which is the initial equilibrium concentration established before the pressure in thesealed container reduces significantly. The HenryŽs Law constants for these compounds have been determined and found to agree with the published values.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2002

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Rapid Communications in Mass Spectrometry

ISSN

0951-4198

e-ISSN

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Svazek periodika

16

Číslo periodika v rámci svazku

N/A

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

6

Strana od-do

2148-2153

Kód UT WoS článku

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EID výsledku v databázi Scopus

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