Analysis of off-flavors in the aquatic environment by stir bar sorptive extraction–thermal desorption–capillary GC/MS/olfactometry

Benanou, D.; Acobas, F.; Roubín, Mirian Raposeiras; David, Frank; Sandra, Pat

doi:10.1007/s00216-003-1868-3

Cited by 102 publications

(49 citation statements)

References 20 publications

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“…Regarding the extraction of 2-MIB and GSM from water samples, various extraction methods in the analysis include closed loop stripping analysis [11], solvent (liquid-liquid) extraction [12,13], or micro extraction [5], solid phase micro extraction with headspace [14], stir bar sorptive extraction [15] and solid phase extraction [16]. Some of these are time-consuming, labor-intensive, are complex for sample preparation or analysis or have poor sensitivity.…”

Section: Introductionmentioning

confidence: 99%

Trace Analysis of Taste-Odor Compounds in Water by Salt-Free Purgeand-Trap Sampling with GC-MS Detection

Manickum¹,

John²

2011

Hydrol Current Res

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Section: Introductionmentioning

confidence: 99%

Trace Analysis of Taste-Odor Compounds in Water by Salt-Free Purgeand-Trap Sampling with GC-MS Detection

Manickum¹,

John²

2011

Hydrol Current Res

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“…A SPME-GC/MS method has been recently employed to identify chlorobromoanisoles at detection levels ranging from 0.03 ng l -1 (for 2,4,6-trichloroanisole) to 0.25 ng l -1 (for 2,3-dibromo-6-chloroanisole) in treated waters and distribution reservoirs (Diaz et al, 2005b). Another solventless technique, stir bar sorptive extraction (SBSA), has been successfully applied to the analysis of trichloro-and tribromoanisoles at ng l -1 levels (Ochiai et al, 2001;Benanou et al, 2003).…”

Section: Odorous Halogenated Dbps In Drinking Watermentioning

confidence: 99%

Optimization of methods for the determination of DBPs

Cancho-Grande

Ventura²

2013

Issue 1

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Chloroform and other bromochlorotrihalomethanes were first identified as disinfection byproducts (DBPs) in chlorinated water in 1970s. Since then, many other DBPs have been identified such as haloacetonitriles, haloacetaldehydes, cyanogen halides, aldehydes, ketoacids, chlorite, bromate and other organic and inorganic compounds. Due to their occurrence and potential health risks, the U.S.EPA promulgated the Stage I Disinfectants and Disinfection Byproducts (D-DBP) Rule in 1998. To assist water utilities monitoring DBPs in their finished water, the U.S. EPA published a list of approved analytical methods under the D-DBP Rule. In 1996, the U.S. EPA also promulgated the Information Collection Rule (ICR) to collect brackground information on DBPs and pathogens for the Stage II D-DBP-Rule. Actually 500 DBPs are known but few have been investigated for their quantitative occurrence and health effects. Due to the fact that their identification and quantitation have become extremely important to drinking water companies in order to reduce or remove their presence, other analytical methods different from those proposed by U.S. EPA have been optimized and are now commented in this article.

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“…Quando a dessorção térmica simultânea de barras SBSE é empregada, o valor β, assim como o tempo de extração, não aumenta e a recuperação não diminui. 22 Segundo Benanou e colaboradores, 24 a barra PDMS após a extração pode ser armazenada por uma semana (4 °C), sem perda significativa do analito, ampliando uma nova perspectiva para a extração e amostragem in loco.…”

Section: Procedimento Sbseunclassified

Extração sortiva em barra de agitação para análise de fármacos em fluidos biológicos

Chaves¹,

Queiroz²

2008

Quím. Nova

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Recebido em 3/8/07; aceito em 17/12/07; publicado na web em 4/9/08 STIR-BAR SORPTIVE EXTRACTION FOR DRUGS ANALYSIS IN BIOLOGICAL FLUIDS. A novel solventless sample preparation, stir-bar sorptive extraction (SBSE), for extraction, and sample enrichment of organic compounds from biological fluids, is described in this manuscript from principle to applications. The SBSE is based on sorptive extraction, whereby the compounds are extracted into a polymer coating, polydimethylsiloxane (PDMS), on a magnetic stirring rod. The extraction is controlled by the partitioning coefficient of drugs between the PDMS and sample matrix, and upon the sample-extraction medium phase ratio. The SBSE technique has been applied successfully, with high sensitivities, to biomedical analysis of volatiles and for semi-volatiles drugs from biological sample, including urine, plasma, and saliva. SBSE combined with in situ derivatization, drugs quite more polar (e.g. metabolites) also can be analyzed.Keywords: stir-bar sorptive extraction (SBSE); drugs; biological fluids. introduçãoEm razão da complexidade dos fluidos biológicos e da baixa concentração dos fármacos nestas matrizes, a etapa de preparo de amostra -extração, pré-concentração dos analitos e eliminação dos interferentes -tem sido requerida no desenvolvimento de métodos cromatográficos com alta sensibilidade e seletividade analítica.Os métodos convencionais, empregados no preparo de amostras biológicas, para análises cromatográficas, têm sido a extração líquido-líquido e extração em fase sólida. [1][2][3][4][5][6] A miniaturização dos sistemas analíticos tem sido uma convergência predominante na área de química analítica. A microextração em fase sólida (SPME -solid-phase micro-extraction), in-tube SPME e a extração sortiva em barra de agitação (SBSE) são exemplos típicos de técnicas de preparo de amostra miniaturizadas. Estas técnicas, quando hifenadas a sistemas analíticos de detecção, têm resultado em análises rápidas, baixo consumo de solvente, menor exposição dos analistas aos fluidos biológicos e aos solventes tóxicos, assim como maior precisão analítica e automação das análises. 7A microextração em fase sólida apresenta uma série de vantagens em relação aos métodos de preparo de amostras convencionais, ou seja: não requer instrumentação analítica sofisticada, não utiliza solvente orgânico, rápido processo operacional, permite automação das análises, a reutilização das fibras extratoras e integra em um único sistema, a extração, concentração e introdução da amostra no sistema cromatográfico. 8,9 Porém, em razão do pequeno volume das fases extratoras e limitado número de fibras SPME, seletivas para análises de fármacos, os métodos analíticos padronizados têm apresentado baixa recuperação analítica, tornando necessária a utilização de sistemas de detecção de alta sensibilidade.Em 1999, Baltussen e colaboradores 10 apresentaram a técnica extração sortiva em barra de agitação, utilizando uma barra de agitação magnética revestida com polidimetilsiloxano (PDMS), a fase extratora.Os v...

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Analysis of off-flavors in the aquatic environment by stir bar sorptive extraction–thermal desorption–capillary GC/MS/olfactometry

Cited by 102 publications

References 20 publications

Trace Analysis of Taste-Odor Compounds in Water by Salt-Free Purgeand-Trap Sampling with GC-MS Detection

Trace Analysis of Taste-Odor Compounds in Water by Salt-Free Purgeand-Trap Sampling with GC-MS Detection

Optimization of methods for the determination of DBPs

Extração sortiva em barra de agitação para análise de fármacos em fluidos biológicos

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