Atmospheric Volatile Organic Compound Monitoring. Ozone Induced Artefact Formation

Bates, Matthew S.; Gonzalez-Flesca, Norbert; Sokhi, Ranjeet S.; Cocheo, Vincenzo

doi:10.1007/978-94-010-0932-4_10

Cited by 11 publications

(16 citation statements)

References 8 publications

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“…Aldehydes: Passive sampling devices (Radiello®, Fondazione Salvatore Maugeri, Padova, Italy (Cocheo et al, 1996)) equipped with dinitrophenyl hydrazine (DNPH) sampling cartridges and ozone scrubbers (Bates et al, 2000), were used to quantify concentrations of the compounds listed in Table 1. After exposure, the sampling cartridges were extracted with 2 ml acetronitrile. The extracts were analysed with HPLC separation (KROMASIL C18 150 mm-3mm -3.5 (im) and UV detection (k=365 nm).…”

Section: Methodsmentioning

confidence: 99%

Risk assessment of sensory irritants in indoor air—a case study in a French school

Meininghaus

Kouniali

Mandin

et al. 2003

Environment International

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Exposure to airborne pollutants can result in adverse health effects. Acute symptoms can for instance comprise of irritation of the eyes or of the respiratory tract (called sensory irritation). In a recent case, health problems were reported in a French school and supposedly attributed to the presence of airborne irritant pollutants. Based on measured concentrations, the risk of developing the described health effects was assessed.Numerous airborne sensory irritants (aldehydes, organic acids, VOCs, SO 2 , NH 3 ) were identified and quantified in the indoor air by using active and passive sampling and online monitoring techniques. Reference values based on toxicological properties of compounds (sensory irritants) were taken from the literature. If not available, tentative values were specially developed for this purpose. Concentrations of all sensory irritants remain below their corresponding guideline values and are comparable to literature data. It was concluded that the risk of developing sensory irritation due to the presence of the studied compounds is negligible. This holds both for individual compounds and for the mixture of studied compounds. Limitations of the employed sampling strategy, and of existing sampling and analytical techniques, which do not allow for analysing more reactive compounds -which are strong sensory irritants -may play a role. New sampling techniques need to be developed. Psychosocial factors (group behaviour, increased attention to sensory irritation) should also be taken into account when dealing with health complaints on sensory irritation.

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Section: Methodsmentioning

confidence: 99%

Risk assessment of sensory irritants in indoor air—a case study in a French school

Meininghaus

Kouniali

Mandin

et al. 2003

Environment International

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“…Following literature, it was mentioned that in presence of low concentration of ozone, some VOCs were lost during sampling on Carbotrap cartridges (Bates et al, 2000). These authors have compared the percentage of recovery for styrene with and without an ozone scrubber at four ozone concentrations (0, 100, 200 and 300 ppb).…”

Section: Influence Of Ozone On the Sampling Of Vocs On Adsorbents Tubesmentioning

confidence: 97%

Influence of Relative Humidity and Ozone on the Sampling of Volatile Organic Compounds on Carbotrap/Carbosieve Adsorbents

Palluau

Mirabel

Millet

2006

Environ Monit Assess

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By using a dynamic dilution system, the atmospheric measurement of 11 selected toxics VOCs (ethylene, acetylene, propene, 1-butene, 1,3-butadiene, 1-pentene, 1-hexene, benzene, toluene, ethylbenzene, m+p-xylene) from the list WHO of 1996 and TO-14 method of US EPA by preconcentration by thermal desorption (TD), analysis by gas chromatography (GC), identification and quantification with a flame ionisation detector (FID) was developed and validated in term of metrology, especially the techniques of sampling of these VOCs with adsorbents cartridges "Air Toxics" when used with an "UMEG sampler" equipped in the inlet with a nafion membrane. In particular the influence of climatic conditions (temperature and relative humidity) and the influence of chemical factors like ozone, on the representativity of sampling were studied. Experiments made with various humidities showed that the addition of a nafion membrane in the inlet of the sampling system was required. Without this membrane, losses of compounds were observed for RH >50%. With this membrane, storage for 2 weeks in a refrigerator, as for canisters, did not induce a loss of compounds. No significative decrease of concentrations of the studied VOCs after 14 days storage, which are known to react with ozone, were observed with an ozone concentrations of 55 ppb. One explanation is that nafion membrane, placed in the inlet of the sampler, will neutralize ozone before entering the sampling tubes. This observation is in accordance with literature which states that the sampling of VOCs on Carbotrap cartridges without ozone scrubber induce a loss of compounds.

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“…However, some other authors (Bates et al 2000;Fick et al 2001;Sartin et al 2001) Fig. 2 Influence of ozone at 60 ppb for benzene, 1,3-butadiene and 1-hexene in canisters and at 150 ppb for propene and ethylene scrubber constituted by MnO 2 , KI or Na 2 SO 3 in the beginning of the sampling system in order to avoid all problems due to ozone.…”

Section: Influence Of Ozone On Selected Vocs In Canistersmentioning

confidence: 97%

Influence of ozone on the sampling and storage of volatile organic compounds in canisters

2006

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A dynamic dilution system was used for the study of the influence of ozone on the sampling and storage of volatile organic compounds (VOCs) at 0, 4, 7 and 14 days in "TO-Can" canisters at two ozone concentrations, 60 and 150 ppbv. Among the 31 ozone precursors VOCs, a representative mixture containing five alkenes, five aromatics, acetylene and 1,3 butadiene was selected using the ClausiusClapeyron equation. Here, we demonstrate that the presence of ozone have no influence on the concentrations of VOCs after 14 days storage period and consequently no problem of representativity of the sampling appears after 14 days of storage. The main explanation is the degradation of ozone in contact with deactivated walls of canisters.

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Atmospheric Volatile Organic Compound Monitoring. Ozone Induced Artefact Formation

Cited by 11 publications

References 8 publications

Risk assessment of sensory irritants in indoor air—a case study in a French school

Risk assessment of sensory irritants in indoor air—a case study in a French school

Influence of Relative Humidity and Ozone on the Sampling of Volatile Organic Compounds on Carbotrap/Carbosieve Adsorbents

Influence of ozone on the sampling and storage of volatile organic compounds in canisters

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