Qualitative and Quantitative Analyses of the Halogenated Volatile Organic Compounds Emitted from the Office Equipment Items

AbstractA piece of fused-silica fibre coated with silica modified with ketamine-groups was used as a solidphase microextraction (SPME) fibre and its efficiency in the qualitative and quantitative analysis of volatile organic compounds released from coloured overprinting on DVDs was evaluated. The effect of the parameters that can affect the SPME procedure, such as extraction time, extraction temperature, desorption temperature, was investigated to determine the analytical performance of this novel fibre in the qualitative and quantitative analyses of organic compounds. The optimised procedure was applied to the qualitative and quantitative analyses of organic compounds released from coloured overprinting on DVDs. The limit of detection of 4-methoxyphenol (mequinol) was 88 × 10−3 μg mL−1, while the limit of quantification (LOQ) was calculated as ten times the baseline noise, i.e. 3.1 × 10−1 μg mL−1. The proposed fibre was used successfully for preconcentration of the volatile organic compounds from the gaseous phase of DVD samples.

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Qualitative and quantitative analysis of a group of volatile organic compounds in biological samples by HS-GC/FID: application in practical cases

Forensic Science International ◽

10.1016/j.forsciint.2014.07.016 ◽

2014 ◽

Vol 243 ◽

pp. 137-143 ◽

Cited By ~ 8

Author(s):

C. Monteiro ◽

J.M. Franco ◽

P. Proença ◽

A. Castañera ◽

A. Claro ◽

...

Keyword(s):

Quantitative Analysis ◽

Volatile Organic Compounds ◽

Organic Compounds ◽

Biological Samples ◽

Qualitative And Quantitative Analysis ◽

Qualitative And Quantitative ◽

Volatile Organic

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Emission of Volatile Organic Compounds from Heartwood and Sapwood of Selected Coniferous Species

Forests ◽

10.3390/f11010092 ◽

2020 ◽

Vol 11 (1) ◽

pp. 92 ◽

Cited By ~ 2

Author(s):

Magdalena Czajka ◽

Beata Fabisiak ◽

Ewa Fabisiak

Keyword(s):

Volatile Organic Compounds ◽

Norway Spruce ◽

Organic Compounds ◽

Scots Pine ◽

Composition Analysis ◽

European Larch ◽

Voc Emission ◽

Percentage Contribution ◽

Qualitative And Quantitative ◽

Volatile Organic

The qualitative and quantitative composition of volatile organic compounds (VOC) emitted from furnishings from solid wood and all kinds of wood derivative materials depends on many factors, of which the most important is the wood species. The intraspecies and interspecies differences in VOC emission result from the differences in the chemical composition and anatomical structure of heartwood and sapwood of different species. VOC composition analysis was performed separately for heartwood and sapwood of Scots pine (Pinus sylvestris L.), Norway spruce (Picea abies (L.) Karst.) and European larch (Larix decidua Mill.) trees. The studies were conducted in a glass climatic chamber of 0.025 m3, equipped with a system for the monitoring and control of climatic conditions. Samples of air for analyses were collected after 3, 7, 14 and 28 days of exposure. The results provided evidence for interspecies and intraspecies differences in the qualitative and quantitative compositions of VOC. The concentration of total VOC (TVOC) released from heartwood of Scots pine was higher than that released from sapwood. For European larch and Norway spruce, the opposite relations were observed. The VOC emission from Scots pine heartwood was about 17 times higher than the emission from European larch and Norway spruce heartwood. The differences in TVOC emitted from the sapwood of samples from different species were smaller. For each of the species, the highest percentage contribution to TVOC was made by terpenes. The second highest percentage contribution in TVOC was made by compounds containing a carbonyl group, mainly aldehydes, while aromatic compounds made the third highest contribution.

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Characterization of Infrared Chemical Sensors Modified with ZnO Nanowires for the Detection of Volatile Organic Compounds

Applied Spectroscopy ◽

10.1366/0003702054615205 ◽

2005 ◽

Vol 59 (8) ◽

pp. 1002-1008 ◽

Cited By ~ 8

Author(s):

Jyisy Yang ◽

Yu-Ru Shih ◽

I-Cherng Chen ◽

Chung-I Kuo ◽

Yih-Shiaw Huang

Keyword(s):

Volatile Organic Compounds ◽

Organic Compounds ◽

Enrichment Factors ◽

Zno Nanowires ◽

Regression Coefficients ◽

Sensing System ◽

Sensing Systems ◽

Volatile Organic ◽

Quantitative Analyses

In this paper we describe the application and characterization of zinc oxide (ZnO) nanowires in an infrared (IR) chemical sensing system for the detection of volatile organic compounds (VOCs). Under suitable conditions, we grew ZnO nanowires on the surfaces of IR internal reflection elements (IREs) and obtained successful results for the detection of VOCs. ZnO nanowires offer a large surface area to effectively adsorb the examined species; the sensitivity of these IR sensing systems was increased by 3- to 15-fold after surface treatment with the ZnO nanowires. To explore the performance of this type of sensor, we correlated the morphologies of the ZnO nanowires grown on the surfaces of the IREs with the adsorption behavior observed during the sensing of the VOCs. To characterize the properties of the ZnO nanowires during the detection of VOCs having a range of functionalities, we classified the VOCs and examined their enrichment factors by comparing the IR signals detected in the presence and absence of the ZnO nanowires. Our results indicate that the ZnO nanowires exhibited better performance for the detection of aromatic-type VOCs than they did for non-aromatic compounds. For quantitative analyses, we examined several compounds for their responses toward varying quantities of injected VOCs. Our results indicate that the IREs treated with ZnO nanowires display acceptable linearity in their standard curves; the linear regression coefficients were higher than 0.995 for a range of volatile compounds.

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