2006
DOI: 10.1365/s10337-005-0691-8
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Reactivity of Carbon Adsorbents Used to Determine Volatile Organic Compounds in Atmospheric Air

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Cited by 9 publications
(6 citation statements)
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“…To that end, it is important to check for known unintended interactions between analytes and sorbents. For example: (i) activated carbon possesses several functional groups like hydroxyl, carbonyl, and carboxylic functions where polar analytes like alcohols might be adsorbed, irreversible by thermodesorption, through hydrogen bonds [ 6 ]; (ii) the surface of carbon-based adsorbents can be activated during conditioning (even in a stream of inert gas) and then cause analyte loss by transformation reactions, especially for alcohols and carbonyl compounds [ 7 9 ]; and (iii) Tenax is known to release aldehydes (e.g., benzaldehyde) and ketones during thermodesorption, which can obscure the determination of these compounds [ 10 , 11 , 7 ]; on the other hand, the degradation products of PDMS can easily be identified using mass selective detectors and are usually unproblematic [ 12 , 13 ].…”
Section: Resultsmentioning
confidence: 99%
“…To that end, it is important to check for known unintended interactions between analytes and sorbents. For example: (i) activated carbon possesses several functional groups like hydroxyl, carbonyl, and carboxylic functions where polar analytes like alcohols might be adsorbed, irreversible by thermodesorption, through hydrogen bonds [ 6 ]; (ii) the surface of carbon-based adsorbents can be activated during conditioning (even in a stream of inert gas) and then cause analyte loss by transformation reactions, especially for alcohols and carbonyl compounds [ 7 9 ]; and (iii) Tenax is known to release aldehydes (e.g., benzaldehyde) and ketones during thermodesorption, which can obscure the determination of these compounds [ 10 , 11 , 7 ]; on the other hand, the degradation products of PDMS can easily be identified using mass selective detectors and are usually unproblematic [ 12 , 13 ].…”
Section: Resultsmentioning
confidence: 99%
“…CC as an apolar material also had the highest yields for esters and long-chain alcohols, but, complementary to HSD, very low efficiency for long-chain esters and terpenes, which may be caused by irreversible adsorption or the degradation of analytes; similar reasons might be responsible for the low extraction yields of the traps containing carbon molecular sieves. It has been found that the surface of carbon-based adsorbents can be activated during the conditioning, even with a stream of inert gas, and then cause analyte loss by transformation reactions, especially for alcohols and carbonyl compounds . This may also apply for the MWCNTs, for which more research is currently being carried out.…”
Section: Resultsmentioning
confidence: 99%
“…In addition, most compounds showed precision and accuracy ≤ 10%, which complied with EPA performance criteria (USEPA, 1999), although large variances were found for ethanol, acetone, 2propanol and vinyl acetate. The above-mentioned oxygenated compounds are highly volatile and have been reported to be thermally labile or reactive with carbon adsorbent at high temperatures (Kornacki et al, 2006(Kornacki et al, , 2005Zhu et al, 2014). Since a high desorption temperature (320 °C) and a long desorption time (12 min) were applied in this study, which are necessary to achieve complete desorption for the high boiling point compounds, sensitivity (the ability to measure small concentrations) for analysing volatile/reactive oxygenated compounds was compromised.…”
Section: Methods Performance Evaluationmentioning
confidence: 99%