Determination of volatile organic compounds in workplace air by multisorbent adsorption/thermal desorption-GC/MS

Wu, Chien-Hou; Feng, Chien-Tai; Lo, Yuk Keung; Lin, Tsai-Yin; Lo, Jiunn-Guang

doi:10.1016/j.chemosphere.2004.02.003

Cited by 92 publications

(50 citation statements)

References 23 publications

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“…68 In future applications the procedure developed in this work may be used to monitorize metallic elements in environmental samples for long periods.…”

Section: Discussionmentioning

confidence: 99%

Simultaneous monitoring of toxic metals on white poplar (populus) by SWASV

Silva¹,

Lopes²,

Leitão³

et al. 2005

J. Braz. Chem. Soc.

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foi utilizada na determinação simultânea de quantidades traço dos metais tóxicos Pb(II), Cd(II) e Cu(II) em folhas de choupo (populus), utilizadas como bio-indicador, recolhidas numa área de tráfego automóvel intenso da cidade de Lisboa. As folhas, após secagem, foram submetidas a um processo de digestão ácida por microondas. Para a aplicação desta técnica à análise das folhas foi realizado um estudo de optimização dos vários parâmetros voltamétricos. O eletrodo de trabalho consistiu num filme de mercúrio depositado numa superfície de carbono vítreo. O sistema Ag/AgCl foi utilizado como referência e um fio de Platina como eletrodo auxiliar. Concentrações médias (em mg de metal/kg de matéria seca -folhas) de 2,6, 0,18 e 5,0 foram obtidas para o Pb(II), o Cd(II) e o Cu(II), respectivamente. O valor obtido para o chumbo coincide com o obtido pelo método de referência baseado na Espectrofotometria de Absorção Atômica em Forno de Grafite (EAAFG).Square wave anodic stripping voltammetry (SWASV) was applied to the simultaneous determination of trace amounts of toxic metals Pb(II), Cd(II) and Cu(II) in white poplar (populus) leaves, used as bio indicator and gathered in a chosen area of the city of Lisbon with very high traffic intensity. The leaves were dried and subsequently exposed to an acid digestion microwave process. Square wave parameters were optimized for the voltammetric analysis of the samples. The working electrode consisted of a thin mercury film (TMFE) deposited on the surface of vitreous carbon. The pair Ag/AgCl was used as the reference electrode and a Pt wire as the auxiliary electrode. Average concentrations (in mg of metal/kg of dry matter-leaves) of 2.6, 0.18, and 5.0 were obtained for Pb(II), Cd(II) and Cu(II), respectively. The value for lead coincides with the one obtained by the reference method based on Graphite Furnace Atomic Absorption Spectrophotometry (GFAAS).

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“…68 In future applications the procedure developed in this work may be used to monitorize metallic elements in environmental samples for long periods.…”

Section: Discussionmentioning

confidence: 99%

Simultaneous monitoring of toxic metals on white poplar (populus) by SWASV

Silva¹,

Lopes²,

Leitão³

et al. 2005

J. Braz. Chem. Soc.

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“…The higher concentration of acetone in HSIP may arise from industrial emissions, because it is a solvent commonly used for cleaning in manufacturing processes. 10,19 It was found that the mean concentration of ethanol showed an increase from spring to winter. Ethanol is usually the solvent used to clean the surfaces of machines and the floor in optoelectronic companies.…”

Section: Concentrations Of Vocs and Seasonal Variationsmentioning

confidence: 99%

Characterization of Volatile Organic Compounds in the Vicinity of an Optoelectronics Industrial Park in Taiwan

Chang

Lin

Shie

et al. 2010

Journal of the Air & Waste Management Association

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This study aimed to determine the concentration of volatile organic compounds (VOCs) and investigate the impacts of traffic and industrial activities on the concentration of VOCs near the Central Taiwan Science Park (CTSP) in Taiwan during 2005. Twelve-hour canister sampling was performed at 10 sites near CTSP every season. Samples were analyzed by gas chromatography with a mass-selective detector. The traffic flow rate, industrial production rates, and meteorological information were also collected to assess their impacts on VOC concentrations using multiple linear regression models. The major components determined in the atmosphere were toluene (29.4 -218.8 g m Ϫ3 ), acetone (30 -71.3 g m Ϫ3 ), m/p-xylene (7.8 -51.7 g m Ϫ3 ), and ethanol (16.4 -47.8 g m Ϫ3 ); only ethanol revealed a pattern of increasing concentration from spring to winter. The log-transformed mean concentrations of toluene, acetone, and ethanol were significantly associated with the production rates of the optoelectronic companies after adjustment for traffic flow and meteorological factors (P Ͻ 0.05). There was no significant association between the total traffic flow rate and any logtransformed mean concentrations of VOCs. Each $1 million (U.S.) increase in optoelectronic sales was significantly associated with increasing mean concentrations of

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“…For example, Chang et al (2010a) found that the ethanol (656.8 ppb-2,594 ppb), acetone (343.3 ppb-2066 ppb), isopropyl alcohol (1.7 ppb-388.5 ppb), and PGMEA (0.9 ppb-205.9 ppb) were the four dominant compounds in a total of ten VOCs identified in a TFT-LCD factory. Wu et al (2004) found the concentrations of PGMEA (252.7 ppb), butyl acetate (237.0 ppb), and acetone (75.9 ppb) in the workplace atmosphere of LCD fabrication facilities. found a maximum exposure concentration of PGMEA of 87.0 ppb in a wafer fabrication industry facility.…”

Section: Concentrations Of Each Individual Voc (C Voci ) In Thementioning

confidence: 99%

“…For high-tech industries, many studies have shown their exposure concentrations of an individual compound (such as ethanol, acetone, butyl acetate, isopropyl alcohol (IPA), and propylene glycol monomethyl ether acetate (PGMEA)) could be much lower than that of traditional industry, and particularly lower than their time-weighted-average permissible exposure concentrations (PEL-TWAs) (Zappe, 1995;Chuah et al, 2000;Wu et al, 2004;Chang et al, 2010a;Cheng et al, 2016;Chou et al, 2016;Guerra et al, 2017). Apparently, chemical exposures in the high-tech industry might not cause significant health risk posed on workers.…”

Section: Introductionmentioning

confidence: 99%

Long-term Multiple Chemical Exposure Assessment for a Thin Film Transistor Liquid Crystal Display (TFT-LCD) Industry

Wang

Kuo

et al. 2017

Aerosol Air Qual. Res.

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A surrogate approach was deployed for assessing long-term exposures of multiple chemicals at 8 selected working areas of 3 manufacturing processes located at a clean room of a thin film transistor liquid crystal display (TFT-LCD) industry. For each selected area, 6 to 12 portable photoionization detector (PID) were placed uniformly in its workplace to measure its total VOCs concentrations (C T-VOCs ) for 6 randomly selected workshifts. Simultaneously, one canister was placed beside one of these portable PIDs, and the collected air sample was analyzed for individual concentration (C VOCi ) of 107 VOCs. Predictive models were established by relating the C T-VOCs to C VOCi of each individual compound via simple regression analysis. The established predictive models were employed to construct a year-long C VOCi databank based on the measured year-long C T-VOC for each selected area using the same portable PID. The ethanol (381 ppb-2,480 ppb), acetone (123 ppb-624 ppb) and propylene glycol monomethyl ether acetate 29 (PGMEA; 14.4 ppb-2,241 ppb) dominated in all selected areas, and all measured C VOCi were much lower than their permissible exposure limits. Predictive models obtained from simple linear regression analyses were found with an R 2 > 0.453 indicating that C T-VOCs were adequate for predicting C VOCi . The predicted year-long C VOCi reveals that long-term total multiple chemical exposures of all selected areas fall to the range 0.10%-20% of the permissible exposure level. Using the C T-VOCs as a surrogate for the routine checking purpose, the present study yielded allowable C T-VOCs fall to the ranges of 49.1 ppm-577 ppm. Considering the approach used in the present study requires less cost and manpower, it would be applicable to similar industries for conducting long-term multiple chemical exposure assessments in the future.

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Determination of volatile organic compounds in workplace air by multisorbent adsorption/thermal desorption-GC/MS

Cited by 92 publications

References 23 publications

Simultaneous monitoring of toxic metals on white poplar (populus) by SWASV

Simultaneous monitoring of toxic metals on white poplar (populus) by SWASV

Characterization of Volatile Organic Compounds in the Vicinity of an Optoelectronics Industrial Park in Taiwan

Long-term Multiple Chemical Exposure Assessment for a Thin Film Transistor Liquid Crystal Display (TFT-LCD) Industry

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