Chemical transformations of alcohols sampled with the use of adsorptive enrichment on the carbon adsorbent traps followed by thermal desorption

Kornacki, Wojciech; Fastyn, Patrycja; Gawlowski, J.; Gierczak, Tomasz; Niedzielski, Jan

doi:10.1039/b501099c

Cited by 7 publications

(7 citation statements)

References 22 publications

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“…These phenomena were not observed in analyses with Tenax TA or Chromosorb 106. 30 Similar losses of C 3 alcohols were also found by McClenny et al, 31 who noted in addition that some C 4 -C 9 aldehydes (especially those with relatively high molecular weights), reacted on the adsorbent when ozone was present (studied interval 0-150 ppb).…”

Section: Resultssupporting

confidence: 73%

“…Table 1 Numbers and amounts (ng tube À1 ) of peaks detected in more than 10 out of 60 samples, and more than three out of 18 blanks from samples obtained using the three tested adsorbents (ng tube À1 calculated as octane equivalents), and ICC values for double samples of the 30 Tenax TA yielded the lowest ratio between the average sum of VOCs in samples and blanks, and there were large variations in the data obtained from Tenax TA blanks. The tubes were also used in other activities in the laboratory, and in some cases the reconditioning procedure had clearly not been sufficient to clean the tubes.…”

Section: Resultsmentioning

confidence: 99%

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A novel approach to evaluation of adsorbents for sampling indoor volatile organic compounds associated with symptom reports

et al. 2008

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This article addresses problems that complicate attempts to compare methods when several factors may be associated with an effect, but it is not known which factors are relevant. Chemicals that may contribute to 'sick building syndrome' (SBS), and thus should be sampled in investigations of SBS, are not currently known. A study was undertaken to compare the utility of three adsorbents (Carbopack B, Chromosorb 106 and Tenax TA) for detecting differences in personal chemical exposure to volatile organic compounds in indoor air, between persons with and without SBS symptoms (cases and controls). On the basis of office workers' responses to a questionnaire, 15 cases and 15 controls were chosen. They simultaneously carried diffusive samplers with adsorbents during a week at work, and the acquired samples were analysed by gas chromatography/mass spectrometry (GC/MS). The adsorbents were then compared in terms of their ability to separate cases and controls in partial least square discriminant analysis (PLS-DA) models. This method of comparison takes into account detected differences in chemical exposure between cases and controls measured with the different adsorbents. Tenax TA gave the best PLS-DA models for separating cases and controls, but a combination of measurements with Tenax TA and Carbopack B gave better PLS-DA models than models based on measurements from either adsorbent alone. Adding measurements from Chromosorb 106 did not improve the results.

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Section: Resultssupporting

confidence: 73%

Section: Resultsmentioning

confidence: 99%

A novel approach to evaluation of adsorbents for sampling indoor volatile organic compounds associated with symptom reports

et al. 2008

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“…While Ribes et al (34) used Carbopack X in multibed tube, they also included CMS material, a sorbent shown in this study to sorb large amounts of water. Future research is in progress to determine the full range of compounds this method can accurately quantify from AFOs since Carbopack X has been shown to chemically transform small alcohols during analysis (38).…”

Section: Resultsmentioning

confidence: 99%

Field Sampling Method for Quantifying Odorants in Humid Environments

Trabue

Scoggin²,

Li³

et al. 2008

Environ. Sci. Technol.

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Most air quality studies in agricultural environments use thermal desorption analysis for quantifying semivolatile organic compounds (SVOCs) associated with odor. The objective of this study was to develop a robust sampling technique for measuring SVOCs in humid environments. Test atmospheres were generated at ambient temperatures (23 ± 1.5 °C) and 25, 50, and 80% relative humidity (RH). Sorbent material used included Tenax, graphitized carbon, and carbon molecular sieve (CMS). Sorbent tubes were challenged with 2, 4, 8, 12, and 24 L of air at various RHs. Sorbent tubes with CMS material performed poorly at both 50 and 80% RH due to excessive sorption of water. Heating of CMS tubes during sampling or dry-purging of CMS tubes post sampling effectively reduced water sorption with heating of tubes being preferred due to the higher recovery and reproducibility. Tenax tubes had breakthrough of the more volatile compounds and tended to form artifacts with increasing volumes of air sampled. Graphitized carbon sorbent tubes containing Carbopack X and Carbopack C performed best with quantitative recovery of all compounds at all RHs and sampling volumes tested. The graphitized carbon tubes were taken to the field for further testing. Field samples taken from inside swine feeding operations showed that butanoic acid, 4-methylphenol, 4-ethylphenol, indole, and 3-methylindole were the compounds detected most often above their odor threshold values. Field samples taken from a poultry facility demonstrated that butanoic acid, 3-methylbutanoic acid, and 4-methylphenol were the compounds above their odor threshold values detected most often. Received December 14, 2007. Revised manuscript received February 08, 2008. Accepted February 14, 2008 Most air quality studies in agricultural environments use thermal desorption analysis for quantifying semivolatile organic compounds (SVOCs) associated with odor. The objective of this study was to develop a robust sampling technique for measuring SVOCs in humid environments. Test atmospheres were generated at ambient temperatures (23 ( 1.5°C) and 25, 50, and 80% relative humidity (RH). Sorbent material used included Tenax, graphitized carbon, and carbon molecular sieve (CMS). Sorbent tubes were challenged with 2, 4, 8, 12, and 24 L of air at various RHs. Sorbent tubes with CMS material performed poorly at both 50 and 80% RH due to excessive sorption of water. Heating of CMS tubes during sampling or drypurging of CMS tubes post sampling effectively reduced water sorption with heating of tubes being preferred due to the higher recovery and reproducibility. Tenax tubes had breakthrough of the more volatile compounds and tended to form artifacts with increasing volumes of air sampled. Graphitized carbon sorbent tubes containing Carbopack X and Carbopack C performed best with quantitative recovery of all compounds at all RHs and sampling volumes tested. The graphitized carbon tubes were taken to the field for further testing. Field samples taken from inside swine feeding operations show...

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“…Rabaud et al (2002) noted problems with excess water when sampling air from a dairy facility in California. While sorbent material such as Carbopack X have been shown to trap both volatile and semi-volatile compounds in humid environments (Trabue et al, 2008a), it is poor at trapping and quantifying alcohols (Kornacki et al, 2005) a key VOC from AFOs (Blunden et al, 2005;Filipy et al, 2006;Ngwabie et al, 2008;Sun et al, 2008). Consequently, we propose using multiple techniques as complementary methods since a single technique would miss a significant fraction of the VOCs associated with AFOs.…”

Section: Introductionmentioning

confidence: 99%

Speciation of volatile organic compounds from poultry production

Trabue

Scoggin

et al. 2010

Atmospheric Environment

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Volatile organic compounds (VOCs) emitted from poultry production are leading source of air quality problems. However, little is known about the speciation and levels of VOCs from poultry production. The objective of this study was the speciation of VOCs from a poultry facility using evacuated canisters and sorbent tubes. Samples were taken during active poultry production cycle and between production cycles. Levels of VOCs were highest in areas with birds and the compounds in those areas had a higher percentage of polar compounds (89%) compared to aliphatic hydrocarbons (2.2%). In areas without birds, levels of VOCs were 1/3 those with birds present and compounds had a higher total percentage of aliphatic hydrocarbons (25%). Of the VOCs quantified in this study, no single sampling method was capable of quantifying more than 55% of compounds and in several sections of the building each sampling method quantified less than 50% of the quantifiable VOCs. Key classes of chemicals quantified using evacuated canisters included both alcohols and ketones, while sorbent tube samples included volatile fatty acids and ketones. Volatile organic compounds (VOCs) emitted from poultry production are leading source of air quality problems. However, little is known about the speciation and levels of VOCs from poultry production. The objective of this study was the speciation of VOCs from a poultry facility using evacuated canisters and sorbent tubes. Samples were taken during active poultry production cycle and between production cycles. Levels of VOCs were highest in areas with birds and the compounds in those areas had a higher percentage of polar compounds (89%) compared to aliphatic hydrocarbons (2.2%). In areas without birds, levels of VOCs were 1/3 those with birds present and compounds had a higher total percentage of aliphatic hydrocarbons (25%). Of the VOCs quantified in this study, no single sampling method was capable of quantifying more than 55% of compounds and in several sections of the building each sampling method quantified less than 50% of the quantifiable VOCs. Key classes of chemicals quantified using evacuated canisters included both alcohols and ketones, while sorbent tube samples included volatile fatty acids and ketones. The top five compounds made up close to 70% of VOCs and included: 1) acetic acid (830.1 mg m À3 ); 2) 2,3-butanedione (680.6 mg m À3 ); 3) methanol (195.8 mg m À3 ); 4) acetone (104.6 mg m À3 ); and 5) ethanol (101.9 mg m À3 ). Location variations for top five compounds averaged 49.5% in each section of the building and averaged 87% for the entire building.Published by Elsevier Ltd.

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Chemical transformations of alcohols sampled with the use of adsorptive enrichment on the carbon adsorbent traps followed by thermal desorption

Cited by 7 publications

References 22 publications

A novel approach to evaluation of adsorbents for sampling indoor volatile organic compounds associated with symptom reports

A novel approach to evaluation of adsorbents for sampling indoor volatile organic compounds associated with symptom reports

Field Sampling Method for Quantifying Odorants in Humid Environments

Speciation of volatile organic compounds from poultry production

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