Abstract：
:A simple, fast and effective pre-concentration procedure for the extraction of benzene, toluene and xylenes isomers (BTX) was developed using an ultrasound-assisted dispersive liquid-liquid microextraction coupled with gas chromatography-flame ionization detector in water samples. The effects of different experimental parameters in the extraction step including type and volume of extraction and dispersive solvents, ionic strength, extraction time and sample volume were studied using two techniques, namely one-variable-at-a-time and response surface methodology. The results of "one-variable-at-a-time" showed that the ionic strength and extraction time were not significant on the extraction efficiency. Therefore, a three-factor, three-level Box-Behnken experimental design was employed to optimize the BTX extraction. The optimal conditions were determined to be a volume of extraction solvent (chloroform) of 51 μL, volume of dispersive solvent (methanol) of 514 μL and volume of sample of 12 mL. The enrichment factors of 241.2-305.1, the limit of detections of 205-382 ng L(-1) were obtained for the BTX at the optimum conditions. In addition, the relative standard deviations for 50 μg L(-1) of the BTX in the water samples were found to be in the range of 1.9 %-5.7 % (n = 5). The developed procedure was then applied for the extraction and determination of BTX in the water samples.
journal_name
Bull Environ Contam Toxicoljournal_title
Bulletin of environmental contamination and toxicologyauthors
Khajeh M,Zadeh FMdoi
10.1007/s00128-012-0657-0subject
Has Abstractpub_date
2012-07-01 00:00:00pages
38-43issue
1eissn
0007-4861issn
1432-0800journal_volume
89pub_type
杂志文章abstract：:Speciation of 238U, 210Po and 210Pb in six different types of Syrian soil (Entisols, Inceptisol, Aridisol, Mollisols, Vertisols and Rock outcrops) was studied using a four-step sequential extraction procedure. The binding nature of 238U, 210Po and 210Pb was correlated with soil properties including soil particles, pH,...
journal_title：Bulletin of environmental contamination and toxicology
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journal_title：Bulletin of environmental contamination and toxicology
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journal_title：Bulletin of environmental contamination and toxicology
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journal_title：Bulletin of environmental contamination and toxicology
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journal_title：Bulletin of environmental contamination and toxicology
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journal_title：Bulletin of environmental contamination and toxicology
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journal_title：Bulletin of environmental contamination and toxicology
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journal_title：Bulletin of environmental contamination and toxicology
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journal_title：Bulletin of environmental contamination and toxicology
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journal_title：Bulletin of environmental contamination and toxicology
pub_type： 杂志文章
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abstract：:Ochratoxin A is one of the most abundant food- contaminating mycotoxins in the world that is immunosuppressive, genotoxic, teratogenic and carcinogenic. Malondialdehyde is a naturally occurring product of lipid peroxidation that is mutagenic and carcinogenic. 8-Hydroxydeoxyguanosine is produced during the interaction ...
journal_title：Bulletin of environmental contamination and toxicology
pub_type： 杂志文章
doi：10.1007/s00128-011-0225-z
更新日期：2011-03-01 00:00:00
