Electrochemical Sensor for Measurement of Volatile Organic Compounds Employing Square Wave Perturbation Voltage

2010 ◽  
Vol 17 (4) ◽  
pp. 637-649 ◽  
Author(s):  
Jacek Gębicki ◽  
Adam Kloskowski
Keyword(s):  
Volatile Organic Compounds ◽  
Electrochemical Sensor ◽  
Organic Compounds ◽  
Gaseous Medium ◽  
Wave Perturbation ◽  
Counter Electrodes ◽  
Limit Of Quantification ◽  
Square Wave ◽  
Wave Voltammetry ◽  
Volatile Organic

Electrochemical Sensor for Measurement of Volatile Organic Compounds Employing Square Wave Perturbation VoltageThe paper presents the results of investigation on a prototype sensor for measurement of benzaldehyde in air. Sensitivity and limit of quantification of the sensor were determined for different internal electrolytes using square wave voltammetry (SWV) as the detection technique. The working and counter electrodes were made of platinum. Ionic liquids 1-hexyl, 3-methylimidazolium chloride, 1-hexyl, 3-methylimidazolium bis (trifluoro-methanesulfonyl) imide and 1-butyl, 3-methylimidazolium tricyanomethan constituted the internal electrolyte. A polydimethylsiloxane (PDMS) membrane separated the gaseous medium from the electrolyte.

scholarly journals A year - round monitoring of ambient volatile organic compounds across Dardanelles strait

2020 ◽  
Vol 14 (2) ◽  
pp. 177-189
Author(s):  
Sibel Mentese ◽  
Batuhan Bas
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Anthropogenic Sources ◽  
Residential Areas ◽  
Limit Of Quantification ◽  
Adverse Health Effects ◽  
Flame Ionization ◽  
Marine Transport ◽  
Sampling Locations ◽  
Volatile Organic

Dardanelles strait has a crucial importance on marine transport, splitting Çanakkale city. Combustion-related anthropogenic sources emit volatile organic compounds (VOCs) into the air and they have public concern due to adverse health effects. In this study, composition of ambient VOCs across Dardanelles strait was monitored for 4 seasons over the year of 2018. A total of 12 sampling locations, including 5 locations on the European and 7 locations on the Asian seashores of Dardanelles strait were determined as sampling points. Standard methods were followed during the sampling and analysis of VOCs. VOCs samples were collected on thermal desorber tubes, containing sorbents of Tenax TA and Carbograph 1TD. Active VOC samples were collected by an air sampling pump and passive VOCs samples were exposed to air for 2 weeks. VOCs samples were analyzed by Thermal Desorber followed by Gas Chromatography – Flame Ionization Detector. Target VOCs in this study were paraffins and aromatic hydrocarbons. Limit of quantification was assessed as ≤ 0.1 µg/m3. According to the results of the study, VOCs concentrations varied both spatially and seasonally. The most abundant VOCs in the air were n-pentane, n-hexane, toluene, benzene, and 1,2,4-trichlorobenzene throughout the study. Furthermore, the highest VOCs levels mostly occurred at the locations that were close to the traffic sources and/or residential areas.

New SPME fibre for analysis of mequinol emitted from DVDs

2011 ◽  
Vol 65 (2) ◽  
Author(s):  
Magdalena Palacz ◽  
Wiesław Wasiak
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Limit Of Detection ◽  
Fused Silica ◽  
Extraction Temperature ◽  
Limit Of Quantification ◽  
Qualitative And Quantitative ◽  
Volatile Organic ◽  
Quantitative Analyses ◽  
Spme Fibre

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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