ChemInform Abstract: Analysis of BTEX Compounds in Water

Abstract

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Ultra trace determination of 31 pesticides in water samples by direct injection–rapid resolution liquid chromatography-electrospray tandem mass spectrometry

“…In the last 20 years, laboratories have concentrated on the development of new extraction techniques to replace traditional liquid-liquid extraction, and the combination of 0003-2670/$ -see front matter © 2008 Elsevier B.V. All rights reserved. doi:10.1016/j.aca.2008.06.053 these with gas chromatography and high-resolution mass spectrometry to improve sample processing efficiency [2][3][4]. More recently, throughput speed has been increased by the use of shorter columns between 1 and 5 m, thinner films of 0.1 m or less, and faster oven temperature programming up to 1200 • C min −1 [5].…”

Removal Mechanisms of Toluene from Aqueous Solutions by Chitin and Chitosan

“…1 The presence of toluene contamination related to petroleum products is due to their high concentration in gasolines: 1.5% (v/v) of toluene, 1% (v/v) of benzene, <1%À1.5% (v/v) of ethylbenzene, and 8%À10% (v/v) of mixed xylene. 1,2 Toluene is also released into the environment by spills during the transport, storage, and disposal of oils and other petroleum products. Typical refinery pollutants with a health risk include BTEX (benzene, toluene, ethylbenzene, and xylene), hydrogen sulfide, ammonia, phenol, NO x , SO x , and HF.…”

“…Low concentrations of toluene were found in groundwater and surface water in a few micrograms per liter; however, accidental emissions may lead to higher concentrations . The presence of toluene contamination related to petroleum products is due to their high concentration in gasolines: 1.5% (v/v) of toluene, 1% (v/v) of benzene, <1%–1.5% (v/v) of ethylbenzene, and 8%–10% (v/v) of mixed xylene. , Toluene is also released into the environment by spills during the transport, storage, and disposal of oils and other petroleum products. Typical refinery pollutants with a health risk include BTEX (benzene, toluene, ethylbenzene, and xylene), hydrogen sulfide, ammonia, phenol, NO x , SO x , and HF .…”

Analysis of BTEX and other substituted benzenes in water using headspace SPME-GC-FID: method validation

“…11,13 The effects of these factors and the advantages of HS-SPME vs immersion-SPME have been studied by several authors using many groups of compounds and many sorts of samples. [14][15][16][17][18][19][20][21][22][23][24] CLSA is an alternative method for concentration of BTEX and other substituted benzenes in water samples. This method is a powerful method for trace enrichment of volatile and semivolatile compounds in water [25][26][27] and was validated for these compounds.…”