Simultaneous determination of 22 volatile organic compounds, methyl-tert-butyl ether, 1,4-dioxane, 2-methylisoborneol and geosmin in water by headspace solid phase microextraction-gas chromatography–mass spectrometry

Nakamura, Sadao; Daishima, Shigeki

doi:10.1016/j.aca.2005.05.077

Cited by 102 publications

(57 citation statements)

References 14 publications

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“…23,27,30,32,34 However, the versatility of the different types of fiber can also be found in the literature, where fiber PDMS/DVB showed better results for the extraction of THMs compounds 35 and in a few exceptions, also PDMS fiber was proposed for the analysis of THMs by HS-SPME. 33 Other variables were the desorption and extraction temperatures showing that at 250 ºC as desorption temperature, the response is maximized, which coincides with James and co-workers 36 (and Horng cited in reference 36) who indicated that the effect of temperature on the absorption of the analytes shows that at low temperatures, the ratio of diffusion is low and the time to reach equilibrium is longer. With an increase in temperature the distribution constant decreases, and as the absorption is generally an exothermic process, then the amount of analyte absorbed into the fiber decreases.…”

Section: Comparison Between Different Values Of the Levels For The Cosupporting

confidence: 53%

“…Several methods have been reported for extraction and preconcentration of samples for the determination of THMs, such as liquid-liquid extraction with n-pentane or n-hexane(LLE) 9-13 headspace (HS) techniques as static methods (HS-GC), 10,[13][14][15][16][17] and dynamic headspace purge and trap, 10,13,[18][19][20][21][22][23][24][25] solid phase extraction (SPE) 26 and solid phase microextraction (SPME), which has been widely used for the determination of these analytes using headspace (HS-SPME). 23,[27][28][29][30][31][32][33][34][35][36] Apart from the techniques of preparation and concentration of samples, these volatile compounds are separated by gas chromatography using capillary columns of medium polarity, followed by electron capture detector (ECD), micro-electron capture (μ-ECD), 34 mass detector (MSD) or inductively coupled plasma-mass spectrometry (ICP-MS). 37 The HS-SPME has great advantages such as sample extraction and preconcentration as its implementation is fast, simple, provides high sensitivity, is free of organic solvents and reusable and does not require great expense.…”

Section: Introductionmentioning

confidence: 99%

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Optimization of the HS-SPME technique by using response surface methodology for evaluating chlorine disinfection by-products by GC in drinking water

Aguirre-González¹,

Ocampo²,

Lubert³

et al. 2011

J. Braz. Chem. Soc.

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Neste trabalho são descritos os resultados da otimização da técnica de microextração em fase sólida acoplada ao headspace e detecção por cromatografia gasosa com detector de microcaptura de elétrons (HS-SPME/GC-μECD). A melhor condição de extração para os quatro trihalometanos em água potável foi conseguida através de um estudo da metodologia de superfície de resposta, usando um planejamento fatorial composto 2 5 . Cinco variáveis influentes tais como o tipo de fibra, temperatura de extração e de dessorção e tempo de extração e de dessorção foram avaliadas. As variávies que exerceram maior influência na técnica HS-SPME foram a temperatura de extração e os tempos de dessorção e extração. O tipo de fibra e a temperatura de dessorção foram menos influentes na eficiência da extração. As melhores condições de extração foram obtidas quando empregou-se a fibra de carboxeno / polidimetilsiloxano (CAR/PDMS) de 75 μm, temperatura de dessorção 250 ºC, de extração 37,5 ºC, tempo de extração 30 min e de dessorção 4 min.In this work the results of the optimization of headspace solid phase microextraction technique and determination by gas chromatography with micro electron capture detector (HS-SPME/GC-μECD) are described. The best condition of extraction for the four trihalomethanes in drinking water was reached through a response surface methodology's study using a composite 2 5 factorial design. Five experimental conditions of influence such as the type of fiber, extraction and desorption temperatures and extraction and desorption times were evaluated. The most influential factors in the technique of HS-SPME were the extraction temperature and extraction and desorption times. The type of fiber and the desorption temperature had little influence on extraction's efficiency. The best conditions were obtained with a fiber carboxen/polidimetilsiloxane (CAR/PDMS) of 75 μm, desorption temperature 250 ºC, extraction temperature 37.5 ºC , extraction time 30 min and a desorption time 4 min.

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Section: Comparison Between Different Values Of the Levels For The Cosupporting

confidence: 53%

Section: Introductionmentioning

confidence: 99%

Optimization of the HS-SPME technique by using response surface methodology for evaluating chlorine disinfection by-products by GC in drinking water

Aguirre-González¹,

Ocampo²,

Lubert³

et al. 2011

J. Braz. Chem. Soc.

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“…35 As can be seen in Figure 1, adding NaCl led to improvements in the extraction efficiencies of each THM. No significant differences were seen between the extraction efficiencies obtained when 4, 5, or 6 g of NaCl was added.…”

Section: Effects Of Temperature Time Headspace Volume Salting Outmentioning

confidence: 67%

“…However, many authors have concluded that the CAR-PDMS fiber gives the best extraction efficiency, [33][34][35][36] which can be attributed to the porous carboxen phase that is able to capture small analytes (with between two and twelve carbon atoms). Therefore, the CAR-PDMS fiber was selected for the optimized method.…”

Section: The Choice Of Fibermentioning

confidence: 99%

Development of a simple analytical method for determining trihalomethanes in beer using a headspace solid-phase microextraction technique

Santos¹,

Carasek²

2013

Quím. Nova

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Recebido em 11/2/13; aceito em 14/3/13; publicado na web em 13/6/13We developed a simple, rapid, and solventless method for analyzing trihalomethanes in beer samples using headspace solid-phase microextraction. The effects of varying experimental parameters, such as extraction temperature and time, addition of sodium chloride, and agitation speed, on extraction yield were studied using a univariate experimental design. Limits of detection between 0.22 and 0.46 μg L -1 and wide linear ranges were achieved for trihalomethanes. We measured the trihalomethane recoveries and precision (as the standard deviation of repeat measurements) and demonstrated the applicability of the proposed method by analyzing 32 beer samples.

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“…[13][14][15][16][17][18][19] Recently, a specific and highly sensitive headspace solid phase microextraction (SPME) [20][21][22][23] and a isotopic dilution headspace (IDHS) 24 …”

Section: -12mentioning

confidence: 99%

Measurement of 1,4-dioxane in surface water by headspace GC-MS

Hong¹,

Lee²,

Lee³

et al. 2014

Analytical Science and Technology

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1,4-Dioxane was classified as a Group 2B carcinogen by the International Agency for Research on Cancer. The compound was measured in surface water with a headspace gas chromatographic mass spectrometric detection. A 5 mL water sample was placed in a 10 mL headspace vial and saturated with NaCl, and the solution was spiked with 1,4-dioxane-d8 as an internal standard and sealed with a cap. Water samples were collected from twenty-two basins of Gum-River on June and September 2012, respectively. As a result, 1,4-

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Simultaneous determination of 22 volatile organic compounds, methyl-tert-butyl ether, 1,4-dioxane, 2-methylisoborneol and geosmin in water by headspace solid phase microextraction-gas chromatography–mass spectrometry

Cited by 102 publications

References 14 publications

Optimization of the HS-SPME technique by using response surface methodology for evaluating chlorine disinfection by-products by GC in drinking water

Optimization of the HS-SPME technique by using response surface methodology for evaluating chlorine disinfection by-products by GC in drinking water

Development of a simple analytical method for determining trihalomethanes in beer using a headspace solid-phase microextraction technique

Measurement of 1,4-dioxane in surface water by headspace GC-MS

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