Image
WTS Database
The subject of interest is:
waterpipe, water-pipe, nargile, narghile, arguileh, arguile, shisha, sheesha, chichi, hubble bubble, hubbly bubbly, goza, hookah, bong
| Title Sort descending | Pub Year | Author | SearchLink |
|---|---|---|---|
| Development and Psychometric Properties of Risk and Protective Factors of Substance Use Scale in Iran: An Application of Social Development Model | 2015 | Assistant Professor, Department of Health Education and Promotion, School of Health, Health Research Institute, Tehran University of Medical Sciences, Tehran, Iran.; PhD Candidate, Community Based Participatory Research Center, Iranian Institute for Reduc | Read more... |
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Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Addiction & health
Periodical, Abbrev.
Addict.Health.
Pub Date Free Form
Summer-Autumn
Volume
7
Issue
4-Mar
Start Page
117
Other Pages
129
Notes
LR: 20160219; JID: 101582275; OID: NLM: PMC4741232; OTO: NOTNLM; ppublish
Place of Publication
Iran
ISSN/ISBN
2008-4633; 2008-4633
Accession Number
PMID: 26885348
Language
eng
SubFile
Journal Article
DOI
Output Language
Unknown(0)
PMID
26885348
Abstract
BACKGROUND: Substance use is a growing public health problem among adolescents. In the lack of a valid and reliable instrument based on social development model (SDM), this study aimed to develop risk and protective factors of substance use scale based on SDM to determine risk and protective factors influencing substance use among adolescents. METHODS: A total of 235 male students from 9th and 10th grade (14-18 years old) of public high schools in Kerman, Iran, selected through multistage cluster sampling. Items pool extracted from the literature and focus groups with male adolescents. Face validity of the questionnaire assessed for readability and clarity of items. Then, an expert panel evaluated the items for content validity. Consequently, construct validity of questionnaire confirmed through exploratory factor analysis (EFA). Known group validity is determined by the degree to which the instrument shows different scores between two groups of those who had an experience in drug use and those who did not have such an experience. In addition, reliability assessed via internal consistency and test-retest. FINDINGS: About 10 factor solution (containing 38 items) emerged as a result of EFA entitled adolescent's "beliefs on hookah and alcohol," "bonding to parents," "family rules on substance use," "drug resistance skills," "adolescent's beliefs on hard drugs," "situational perception on hookah and alcohol," "rules of school," "situational perception on hard drugs," "attachment to school," and "perceived opportunity at school." The first four emerged factors explained 46% of the total variance observed. Among these factors, adolescent's beliefs on hookah and alcohol explained a more than 25.3% of the total variance. Results indicated satisfactory internal consistency (Cronbach cents alpha ranging from 0.71 to 0.85) and intra-class correlation coefficients (ICC) (ranging from 0.48 to 0.81). CONCLUSION: The risk and protective factors of substance use questionnaire are the first instrument based on the SDM. The findings showed that this questionnaire is a valid and reliable instrument for assessing determinants of substance use which can be used by researchers and policymakers in preventive initiatives.
Descriptors
Links
Book Title
Database
Publisher
Data Source
Authors
Iranpour,A., Jamshidi,E., Nakhaee,N., Haghdoost,A.A., Shojaeizadeh,D., Eftekhar-Ardabili,M., Eftekhar-Ardabili Mph,H.
Original/Translated Title
URL
Date of Electronic
PMCID
PMC4741232
Editors
|
|||
| Development of a new sorptive extraction method based on simultaneous direct and headspace sampling modes for the screening of polycyclic aromatic hydrocarbons in water samples | 2015 | Departamento Quimica Analitica, Nutricion y Bromatologia, Instituto de Investigacion y Analisis Alimentario, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain.; Departamento Quimica Analitica, Nutricion y Bromatologia, Instituto d | Read more... |
|
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Talanta
Periodical, Abbrev.
Talanta
Pub Date Free Form
Jan
Volume
132
Issue
Start Page
433
Other Pages
442
Notes
CI: Copyright (c) 2014; JID: 2984816R; 0 (Acenaphthenes); 0 (Acetonitriles); 0 (Drinking Water); 0 (Fluorenes); 0 (Polycyclic Hydrocarbons, Aromatic); 0 (Pyrenes); 0 (Silicones); 0 (Waste Water); 0 (Water Pollutants, Chemical); 1Z25C36811 (acenaphthylene)
Place of Publication
Netherlands
ISSN/ISBN
1873-3573; 0039-9140
Accession Number
PMID: 25476328
Language
eng
SubFile
Journal Article; Research Support, Non-U.S. Gov't; IM
DOI
10.1016/j.talanta.2014.09.044 [doi]
Output Language
Unknown(0)
PMID
25476328
Abstract
A new straightforward and inexpensive sample screening method for both EPA and EU priority polycyclic aromatic hydrocarbons (PAHs) in water has been developed. The method is based on combined direct immersion and headspace (DIHS) sorptive extraction, using low-cost disposable material, coupled to ultraperformance liquid chromatography with fluorescence and UV detection (UPLC-FD-UV). Extraction parameters, such as the sampling mode, extraction time and ionic strength were investigated in detail and optimized. Under optimized conditions, water samples (16 mL) were concentrated in silicone disks by headspace (HS) and direct immersion (DI) modes simultaneously, at room temperature for 9h for the majority of the 24 studied compounds. Ultrasound-assisted desorption of extracted analytes in acetonitrile was carried out also at room temperature. The optimized chromatographic method provided a good linearity (R>/=0.9991) and a broad linear range for all studied PAHs. The proposed analytical procedure exhibited a good precision level with relative standard deviations below 15% for all analytes. Quantification limits between 0.7 and 2.3 microg L(-1) and 0.16 and 3.90 ng L(-1) were obtained for compounds analyzed by UV (acenaphtylene, cyclopenta[c,d]pyrene and benzo[j]fluoranthene) and fluorescence, respectively. Finally, the proposed method was applied to the determination of PAHs in different real tap, river and wastewater samples.
Descriptors
Links
Book Title
Database
Publisher
Elsevier B.V
Data Source
Authors
Trinanes,S., Pena,M.T., Casais,M.C., Mejuto,M.C.
Original/Translated Title
URL
Date of Electronic
20141007
PMCID
Editors
|
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| Development of a novel ultrasound-assisted surfactant-enhanced emulsification microextraction method and its application to the analysis of eleven polycyclic aromatic hydrocarbons at trace levels in water | 2011 | Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, China. chengjingok@mail.ccnu.edu.cn | Read more... |
|
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Journal of chromatography.A
Periodical, Abbrev.
J.Chromatogr.A
Pub Date Free Form
6-May
Volume
1218
Issue
18
Start Page
2476
Other Pages
2482
Notes
LR: 20121115; CI: Copyright (c) 2011; JID: 9318488; 0 (Cyclohexanes); 0 (Polycyclic Hydrocarbons, Aromatic); 0 (Polysorbates); 0 (Surface-Active Agents); 0 (Water Pollutants, Chemical); 48K5MKG32S (Cyclohexane); 2011/01/13 [received]; 2011/02/21 [revised]
Place of Publication
Netherlands
ISSN/ISBN
1873-3778; 0021-9673
Accession Number
PMID: 21420097
Language
eng
SubFile
Journal Article; Research Support, Non-U.S. Gov't; IM
DOI
10.1016/j.chroma.2011.02.049 [doi]
Output Language
Unknown(0)
PMID
21420097
Abstract
A novel ultrasound-assisted surfactant-enhanced emulsification microextraction (UASEME) technique has been proposed by using low-density extraction solvents. In the proposed technique, Tween 80 and cyclohexane were injected into 5-mL glass test tubes with conical bottoms, containing 5.00 mL of a water sample that was located inside the ultrasonic bath. When the extraction process was finished, the glass test tube was sealed with a rubber plug and then placed upside down in a centrifuge. The finely dispersed droplets of cyclohexane collected at the conical bottom of test tube because the density of cyclohexane is less than of water, and the PAHs were concentrated in the cyclohexane. Next, 5 muL of the cyclohexane that collected at the conical bottom was removed using a 10-muL microsyringe and injected into high performance liquid chromatography coupled with fluorescence detection (HPLC-FLD) for analysis. The proposed method avoided the use of chlorinated solvents, which have been widely used as extraction solvents in a normal UASEME assay. Parameters that affected the extraction efficiency, such as the type and volume of the extraction solvent, the type and concentration of the surfactant, and the ultrasound emulsification time and salt addition, were investigated and optimised for the method. Under the optimum conditions, the enrichment factors ranged between 90 and 247. The limits of detection of the method were 0.6-62.5 ng L(-1). Good recoveries and repeatability of the method for the eleven PAHs were also obtained. The proposed UASEME technique has been demonstrated to be simple, practical and environmentally friendly for the determination of PAH residues in real water samples.
Descriptors
Links
Book Title
Database
Publisher
Elsevier B.V
Data Source
Authors
Cheng,J., Matsadiq,G., Liu,L., Zhou,Y.W., Chen,G.
Original/Translated Title
URL
Date of Electronic
20110317
PMCID
Editors
|
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| Development of a PCR assay for the strain-specific identification of probiotic strain Lactobacillus paracasei IMPC2.1 | 2009 | Institute of Sciences of Food Production, National Research Council, Bari, Italy. | Read more... |
|
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
International journal of food microbiology
Periodical, Abbrev.
Int.J.Food Microbiol.
Pub Date Free Form
30-Nov
Volume
136
Issue
1
Start Page
59
Other Pages
65
Notes
GENBANK/EU187503; JID: 8412849; 0 (DNA, Bacterial); 0 (RNA, Ribosomal, 16S); 2009/05/18 [received]; 2009/09/15 [revised]; 2009/09/17 [accepted]; 2009/09/26 [aheadofprint]; ppublish
Place of Publication
Netherlands
ISSN/ISBN
1879-3460; 0168-1605
Accession Number
PMID: 19833402
Language
eng
SubFile
Journal Article; Research Support, Non-U.S. Gov't; IM
DOI
10.1016/j.ijfoodmicro.2009.09.017 [doi]
Output Language
Unknown(0)
PMID
19833402
Abstract
Recent investigations clearly indicate that the probiotic bacterium Lactobacillus paracasei IMPC2.1 can be incorporated into vegetables to obtain innovative probiotic foods whose marketing has been authorized by the Italian Ministry of Health. In this study, strain IMPC2.1 was characterized at a molecular level in order to define its taxonomic position and to develop a PCR test for strain-specific identification. Molecular methods, such as 16S rRNA gene sequencing and multiplex PCR, have provided evidence that strain IMPC2.1 indeed belongs to the L. paracasei species. In addition, a cluster analysis of fluorescent amplified fragment length polymorphism (f-AFLP) data strongly indicated that strain IMPC2.1 and nine other L. paracasei strains (including strain ATCC 334) belong to the same species and are definitely differentiated from the type strain L. casei ATCC 393. The f-AFLP technique was also used to identify a strain-specific DNA fragment of L. paracasei IMPC2.1 - encoding an amino acid sequence similar to a glycosyltransferase of probiotic strain Lactobacillus rhamnosus HN001 - which enabled us to develop a rapid PCR test for strain-specific identification. The strain-specificity of the PCR test was assessed by comparison with a total of 73 bacterial strains mainly isolated from vegetable products that did not produce any amplified fragment. These strains belonged to the L. paracasei species, to 6 additional species of Lactobacillus and to Weissella cibaria, W. confusa, Lactococcus lactis, Leuconostoc mesenteroides and Pediococcus pentosaceus. A method similar to the one used in this study can be adopted to develop easy, rapid detection techniques for monitoring other bacteria in complex microbiota.
Descriptors
Amplified Fragment Length Polymorphism Analysis, Bacterial Typing Techniques/methods, Biodiversity, DNA, Bacterial/genetics, Food Microbiology, Lactobacillus/classification/genetics/growth & development/isolation & purification, Molecular Sequence Data, Phylogeny, Polymerase Chain Reaction/methods, Probiotics, RNA, Ribosomal, 16S/genetics, Sequence Analysis, DNA, Species Specificity
Links
Book Title
Database
Publisher
Data Source
Authors
Sisto,A., De Bellis,P., Visconti,A., Morelli,L., Lavermicocca,P.
Original/Translated Title
URL
Date of Electronic
20090926
PMCID
Editors
|
|||
| Development of a solid-phase microextraction fiber by chemical binding of polymeric ionic liquid on a silica coated stainless steel wire | 2012 | State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China. | Read more... |
|
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Journal of chromatography.A
Periodical, Abbrev.
J.Chromatogr.A
Pub Date Free Form
23-Mar
Volume
1230
Issue
Start Page
8
Other Pages
14
Notes
LR: 20131121; CI: Copyright (c) 2012; JID: 9318488; 0 (Ionic Liquids); 0 (Polycyclic Hydrocarbons, Aromatic); 0 (Water Pollutants, Chemical); 059QF0KO0R (Water); 12597-68-1 (Stainless Steel); 7631-86-9 (Silicon Dioxide); 2011/11/28 [received]; 2012/01/17
Place of Publication
Netherlands
ISSN/ISBN
1873-3778; 0021-9673
Accession Number
PMID: 22340892
Language
eng
SubFile
Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't; IM
DOI
10.1016/j.chroma.2012.01.052 [doi]
Output Language
Unknown(0)
PMID
22340892
Abstract
A novel approach was developed for the fabrication of solid-phase microextraction (SPME) fiber by coating stainless steel fiber with a polymeric ionic liquid (PIL) through covalent bond. The stainless steel fiber was sequentially coated with a gold film by replacement reaction between Fe and Au when immerged in chloroauric acid, assembled with a monolayer of 3-(mercaptopropyl) triethoxysilane on the gold layer through the Au-S bond, and coated with a silica layer by the hydrolysis and polycondensation reaction of the surface-bonded siloxane moieties and the active silicate solution. Then, 1-vinyl-3-(3-triethoxysilylpropyl)-4,5-dihydroimidazolium chloride ionic liquid was anchored on the silica layer by covalent bond, and the PIL film was further formed by free radical copolymerization between 1-vinyl-3-(3-triethoxysilylpropyl)-4,5-dihydroimidazdium and vinyl-substituted imidazolium with azobisisobutyronitrile (AIBN) as initiator. Parameters influencing the preparation of PIL fiber were optimized, and the developed SPME fiber has a coating thickness of ~20 mum with good thermal stability and long lifetime. The performance of the PIL fiber was evaluated by analysis of polycyclic aromatic hydrocarbons (PAHs) in water samples. The developed PIL fiber showed good linearity between 0.5 and 20 mug l(-1) with regression coefficient in the range of 0.963-0.999, detection limit ranging from 0.05 to 0.25 mug l(-1), and relative standard deviation of 9.2-29% (n=7). This developed PIL fiber exhibited comparable analytical performance to commercial 7 mum thickness PDMS fiber in the extraction of PAHs. The spiked recoveries for three real water samples at 0.5-5 mug l(-1) levels were 49.6-111% for the PIL fiber and 40.8-103% for the commercial PDMS fiber.
Descriptors
Links
Book Title
Database
Publisher
Elsevier B.V
Data Source
Authors
Pang,L., Liu,J.F.
Original/Translated Title
URL
Date of Electronic
20120125
PMCID
Editors
|
|||
| Development of a versatile, easy and rapid atmospheric monitor for benzene, toluene, ethylbenzene and xylenes determination in air | 2009 | Analytical Chemistry Department, University of Valencia, Edifici Jeroni Munoz, 50 Dr. Moliner, 46100 Burjassot, Valencia, Spain. francesc.a.esteve@uv.es | Read more... |
|
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Journal of chromatography.A
Periodical, Abbrev.
J.Chromatogr.A
Pub Date Free Form
27-Nov
Volume
1216
Issue
48
Start Page
8549
Other Pages
8556
Notes
LR: 20131121; JID: 9318488; 0 (Benzene Derivatives); 0 (Membranes, Artificial); 0 (Xylenes); 3FPU23BG52 (Toluene); J64922108F (Benzene); L5I45M5G0O (ethylbenzene); 2009/06/12 [received]; 2009/09/08 [revised]; 2009/10/02 [accepted]; 2009/10/09 [aheadofprin
Place of Publication
Netherlands
ISSN/ISBN
1873-3778; 0021-9673
Accession Number
PMID: 19853854
Language
eng
SubFile
Journal Article; Research Support, Non-U.S. Gov't; IM
DOI
10.1016/j.chroma.2009.10.001 [doi]
Output Language
Unknown(0)
PMID
19853854
Abstract
A new procedure for the passive sampling in air of benzene, toluene, ethylbenzene and xylene isomers (BTEX) is proposed. A low-density polyethylene layflat tube filled with a mixture of solid phases provided a high versatility tool for the sampling of volatile compounds from air. Several solid phases were assayed in order to increase the BTEX absorption in the sampler and a mixture of florisil and activated carbon provided the best results. Direct head-space-gas chromatography-mass spectrometry (HS-GC-MS) measurement of the whole deployed sampler was employed for a fast determination of BTEX. Absorption isotherms were used to develop simple mathematical models for the estimation of BTEX time-weighted average concentrations in air. The proposed samplers were used to determine BTEX in indoor air environments and results were compared with those found using two reference methodologies: triolein-containing semipermeable membrane devices (SPMDs) and diffusive Radiello samplers. In short, the developed sampling system and analytical strategy provides a versatile, easy and rapid atmospheric monitor (VERAM).
Descriptors
Adsorption, Air/analysis, Benzene/analysis, Benzene Derivatives/analysis, Environmental Monitoring/methods, Membranes, Artificial, Permeability, Temperature, Time Factors, Toluene/analysis, Xylenes/analysis
Links
Book Title
Database
Publisher
Data Source
Authors
Esteve-Turrillas,F. A., Ly-Verdu,S., Pastor,A., de la Guardia,M.
Original/Translated Title
URL
Date of Electronic
20091009
PMCID
Editors
|
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| Development of an Escherichia coli K12-specific quantitative polymerase chain reaction assay and DNA isolation suited to biofilms associated with iron drinking water pipe corrosion products | 2014 | US Environmental Protection Agency ORD, NERL, MCEARD, Cincinnati, OH 45268, USA E-mail: Lu.Jingrang@epa.gov; jingrang_lu@yahoo.com.; ORISE, US Environmental Protection Agency ORD, NERL, MCEARD, Cincinnati, OH 45268, USA and Department of Geology, Universi | Read more... |
|
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Journal of water and health
Periodical, Abbrev.
J.Water.Health.
Pub Date Free Form
Dec
Volume
12
Issue
4
Start Page
763
Other Pages
771
Notes
JID: 101185420; 0 (DNA, Bacterial); 0 (Drinking Water); E1UOL152H7 (Iron); ppublish
Place of Publication
England
ISSN/ISBN
1477-8920; 1477-8920
Accession Number
PMID: 25473986
Language
eng
SubFile
Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.; IM
DOI
10.2166/wh.2014.203 [doi]
Output Language
Unknown(0)
PMID
25473986
Abstract
A quantitative polymerase chain reaction assay (115 bp amplicon) specific to Escherichia coli K12 with an ABI(TM) internal control was developed based on sequence data encoding the rfb gene cluster. Assay specificity was evaluated using three E. coli K12 strains (ATCC W3110, MG1655 & DH1), 24 non-K12 E. coli and 23 bacterial genera. The biofilm detection limit was 10(3) colony-forming units (CFU) E. coli K12 mL(-1), but required a modified protocol, which included a bio-blocker Pseudomonas aeruginosa with ethylenediaminetetraacetic acid buffered to pH 5 prior to cell lysis/DNA extraction. The novel protocol yielded the same sensitivity for drinking water biofilms associated with Fe3O4 (magnetite)-coated SiO2 (quartz) grains and biofilm-surface iron corrosion products from a drinking water distribution system. The novel DNA extraction protocol and specific E. coli K12 assay are sensitive and robust enough for detection and quantification within iron drinking water pipe biofilms, and are particularly well suited for studying enteric bacterial interactions within biofilms.
Descriptors
Links
Book Title
Database
Publisher
Data Source
Authors
Lu,J., Gerke,T.L., Buse,H.Y., Ashbolt,N.J.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
|
|||
| Development of an innovative and "green" stir bar sorptive extraction-thermal desorption-gas chromatography-tandem mass spectrometry method for quantification of polycyclic aromatic hydrocarbons in marine biota | 2014 | LEMAR - UMR 6539 - Technopole de Brest-Iroise, 29280 Plouzane, France. Electronic address: camlacroix@hotmail.fr.; CEDRE - 715, Rue Alain Colas/CS 41836, 29218 Brest Cedex 2, France.; CEDRE - 715, Rue Alain Colas/CS 41836, 29218 Brest Cedex 2, France.; LE | Read more... |
|
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Journal of chromatography.A
Periodical, Abbrev.
J.Chromatogr.A
Pub Date Free Form
4-Jul
Volume
1349
Issue
Start Page
1
Other Pages
10
Notes
CI: Copyright (c) 2014; JID: 9318488; 0 (Polycyclic Hydrocarbons, Aromatic); 0 (Water Pollutants, Chemical); OTO: NOTNLM; 2014/02/13 [received]; 2014/04/28 [revised]; 2014/04/29 [accepted]; 2014/05/04 [aheadofprint]; ppublish
Place of Publication
Netherlands
ISSN/ISBN
1873-3778; 0021-9673
Accession Number
PMID: 24857036
Language
eng
SubFile
Journal Article; Research Support, Non-U.S. Gov't; IM
DOI
10.1016/j.chroma.2014.04.094 [doi]
Output Language
Unknown(0)
PMID
24857036
Abstract
There is a growing awareness of the need to reduce the negative impact of chemical analyses on the environment and to develop new eco-friendly and sustainable analytical methods without compromising performance. In this study, we developed a "green" analytical method enabling the accurate and simultaneous routine analysis of 21 polycyclic aromatic hydrocarbons (PAHs) in reduced quantities (100mg and 1g wet weight (WW)) of marine biota samples (fish muscle, mussel and oyster tissues) using alkaline digestion combined with stir bar sorptive extraction-thermal desorption-gas chromatography-tandem mass spectrometry (SBSE-GC-MS/MS). The innovative method provides good selectivity and specificity for most compounds. In 1gWW samples, limits of quantification (LOQs) ranged from 1 to 10mug/kgWW in fish muscle and from 0.5 to 10mug/kgWW in mussel tissue. The method enables most analytes to be quantified below the restrictive limits established by the European Commission (2 and 10mug/kgWW in fish muscle and bivalve mollusc, respectively). Higher LOQs were obtained in 100mgWW samples ranging from 1 to 50mug/kgWW. Recovery and linearity were assessed for all analytes. The results were satisfactory for most compounds with recoveries ranging from 94% to 117% in 1gWW mussel samples at spike concentration of 10ng/gWW with standard deviation not exceeding 12%. However, results confirmed that the SBSE efficiency is affected by the complexity of biological matrices, especially for high molecular weight compounds in lipid-rich mussel tissue. Because of the matrix effects, matrix-matched calibrations were carried out. Validation was performed using the standard reference material 1974c with recovery ranging from 71% to 119% except for naphthalene, anthracene and benzo(e)pyrene that were therefore not validated. Overall, the developed method meets analytical validation criteria for most compounds. Thanks to the combination of alkaline digestion and SBSE, which greatly simplifies sample treatment and limits solvent use to ethanol, the developed method followed most green analytical chemistry principles.
Descriptors
Links
Book Title
Database
Publisher
Elsevier B.V
Data Source
Authors
Lacroix,C., Le Cuff,N., Receveur,J., Moraga,D., Auffret,M., Guyomarch,J.
Original/Translated Title
URL
Date of Electronic
20140504
PMCID
Editors
|
|||
| Development of an ionic liquid based dispersive liquid-liquid microextraction method for the analysis of polycyclic aromatic hydrocarbons in water samples | 2009 | Dpto. Quimica Analitica, Nutricion y Bromatologia, Instituto de Investigacion y Analisis Alimentario, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain. | Read more... |
|
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Journal of chromatography.A
Periodical, Abbrev.
J.Chromatogr.A
Pub Date Free Form
4-Sep
Volume
1216
Issue
36
Start Page
6356
Other Pages
6364
Notes
LR: 20131121; JID: 9318488; 0 (1-butyl-3-methylimidazolium hexafluorophosphate); 0 (1-octyl-3-methylimidazolium hexafluorophosphate); 0 (Imidazoles); 0 (Ionic Liquids); 0 (Polycyclic Hydrocarbons, Aromatic); 0 (Solvents); 0 (Water Pollutants, Chemical); 0
Place of Publication
Netherlands
ISSN/ISBN
1873-3778; 0021-9673
Accession Number
PMID: 19646707
Language
eng
SubFile
Journal Article; Research Support, Non-U.S. Gov't; IM
DOI
10.1016/j.chroma.2009.07.032 [doi]
Output Language
Unknown(0)
PMID
19646707
Abstract
A simple, rapid and efficient method, ionic liquid based dispersive liquid-liquid microextraction (IL-DLLME), has been developed for the first time for the determination of 18 polycyclic aromatic hydrocarbons (PAHs) in water samples. The chemical affinity between the ionic liquid (1-octyl-3-methylimidazolium hexafluorophosphate) and the analytes permits the extraction of the PAHs from the sample matrix also allowing their preconcentration. Thus, this technique combines extraction and concentration of the analytes into one step and avoids using toxic chlorinated solvents. The factors affecting the extraction efficiency, such as the type and volume of ionic liquid, type and volume of disperser solvent, extraction time, dispersion stage, centrifuging time and ionic strength, were optimised. Analysis of extracts was performed by high performance liquid chromatography (HPLC) coupled with fluorescence detection (Flu). The optimised method exhibited a good precision level with relative standard deviation values between 1.2% and 5.7%. Quantification limits obtained for all of these considered compounds (between 0.1 and 7 ng L(-1)) were well below the limits recommended in the EU. The extraction yields for the different compounds obtained by IL-DLLME, ranged from 90.3% to 103.8%. Furthermore, high enrichment factors (301-346) were also achieved. The extraction efficiency of the optimised method is compared with that achieved by liquid-liquid extraction. Finally, the proposed method was successfully applied to the analysis of PAHs in real water samples (tap, bottled, fountain, well, river, rainwater, treated and raw wastewater).
Descriptors
Analytic Sample Preparation Methods, Chromatography, High Pressure Liquid, Imidazoles, Ionic Liquids, Microchemistry/methods, Osmolar Concentration, Polycyclic Hydrocarbons, Aromatic/analysis, Rain/chemistry, Reproducibility of Results, Rivers/chemistry, Solvents, Time Factors, Water/chemistry, Water Pollutants, Chemical/analysis
Links
Book Title
Database
Publisher
Data Source
Authors
Pena,M. T., Casais,M. C., Mejuto,M. C., Cela,R.
Original/Translated Title
URL
Date of Electronic
20090721
PMCID
Editors
|
|||
| Development of diagnostic methods for asbestos cement pipes - Development plan and interim report of study | 1990 | Investigation and Research Department, Japan Water Pipe Systems Research Center, 2-1-9, Shinkawa, Chuo-ku, Tokyo 104 | Read more... |
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Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Water Supply
Periodical, Abbrev.
Water Supply
Pub Date Free Form
1990/
Volume
8
Issue
4-Mar
Start Page
683
Other Pages
692
Notes
Place of Publication
ISSN/ISBN
0735-1917
Accession Number
Language
SubFile
DOI
Output Language
Unknown(0)
PMID
Abstract
Asbestos cement pipes are in urgent demand for replacement because of the high frequency of failures. In response to this demand, The Japan Water Pipe Systems Research Center is developing diagnostic methods for asbestos cement pipes aiming at contributing to timely and effective replacement. Three methods have been studied: (1) Direct diagnosis (using 10 types of inspection method), (2) Indirect diagnosis based on statistical analysis (2 types of method), and (3) Diagnosis based on measured data. This wide selection of diagnoses is being narrowed down to the most beneficial and sensible approaches.
Descriptors
asbestos, cement, conference paper, monitoring, pipeline, water supply
Links
Book Title
Database
Embase
Publisher
Data Source
Embase
Authors
Watanabe,S., Nakajima,T., Ishibashi,K.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
|
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