WTS database

Title	Pub Year	Author Sort descending	SearchLink
Analysis of the gastrointestinal symptoms of uninvestigated dyspepsia and irritable bowel syndrome	2009	Department of Endoscopic Center, Hyogo College of Medicine, Nishinomiya, Japan.	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Gut and liver Periodical, Abbrev. Gut Liver Pub Date Free Form Sep Volume 3 Issue 3 Start Page 192 Other Pages 196 Notes LR: 20131113; JID: 101316452; OID: NLM: PMC2852717; OTO: NOTNLM; 2009/05/28 [received]; 2009/07/05 [accepted]; 2009/09/30 [epublish]; ppublish Place of Publication Korea (South) ISSN/ISBN 2005-1212; 1976-2283 Accession Number PMID: 20431745 Language eng SubFile Journal Article DOI 10.5009/gnl.2009.3.3.192 [doi] Output Language Unknown(0) PMID 20431745 Abstract BACKGROUND/AIMS: Epidemiological studies suggest that there is a considerable overlap between functional dyspepsia (FD) and irritable bowel syndrome (IBS). The aim of this study was to examine concurrent gastrointestinal symptoms in FD and IBS. METHODS: A total of 186 college students filled out a questionnaire regarding whether they had uninvestigated dyspepsia (UD, FD without endoscopic examination) and IBS based on Rome-II criteria. Gastrointestinal symptoms were measured using the Gastrointestinal Symptom Rating Scale (GSRS) questionnaire. RESULTS: A total of 181 students (98 males, mean age 24.6 years) completed both questionnaires. The prevalence of UD, IBS, and UD+IBS overlap was 12 (6.7%), 40 (22.1%), and 8 (4.4%), respectively. A significant UD+IBS overlap was observed (66.7% IBS in UD, 20.0% UD in IBS). Reflux scores of GSRS in either UD or IBS were significantly greater than in those without. Gastroesophageal reflux disease (GERD), defined as weekly occurring moderate symptoms of heartburn and/or acid regurgitation and evaluated using the GSRS, was found in 16 (8.8%) of the subjects. The prevalence of IBS was significantly higher in GERD patients than in non-GERD patients (50.0% vs 19.4%). CONCLUSIONS: The considerable overlap not only between UD and IBS, but also between GERD and IBS, suggests the involvement of common pathophysiological disturbances in the two conditions. Descriptors Dyspepsia, Gastroesophageal reflux, Gastrointestinal symptom rating scale, Irritable bowel syndrome, Overlap Links Book Title Database Publisher Data Source Authors Hori,K., Matsumoto,T., Miwa,H. Original/Translated Title URL Date of Electronic 20090930 PMCID PMC2852717 Editors
Prevalence of Barrett's esophagus in Northern Greece: A Prospective Study (Barrett's esophagus)	2013	Department of Endoscopy and Motility Unit, G. Gennimatas General Hospital, Thessaloniki, Greece.	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Hippokratia Periodical, Abbrev. Hippokratia Pub Date Free Form Jan Volume 17 Issue 1 Start Page 27 Other Pages 33 Notes LR: 20140731; JID: 101296613; OID: NLM: PMC3738273; OTO: NOTNLM; ppublish Place of Publication Greece ISSN/ISBN 1108-4189; 1108-4189 Accession Number PMID: 23935340 Language eng SubFile Journal Article DOI Output Language Unknown(0) PMID 23935340 Abstract BACKGROUND: Barrett's esophagus(BE) is a premalignant condition associated with chronic gastro-esophageal reflux disease (GERD). As only a small proportion of BE progresses to malignancy, it is important to study BE prevalence to prevent adenocarcinoma. MATERIALS AND METHODS: Between January 2007 and December 2010, all consecutive individuals who underwent routine upper endoscopy were prospectively recruited. Patients referred for GERD were excluded from the study. Clinical and endoscopic data were collected. RESULTS: A total of 1,990 patients (mean age 47.48+/-13.4 years; 52.8% males) were included. Of them, 496 (24.9%) reported GERD. Erosive esophagitis (EE) was found in 221 participants (11.1%, 193 patients with LA grade A and 28 patients with LA grade B). Overall 31 of 1494 participants not reporting reflux symptoms (2.07%) suffered from silent GERD. BE was diagnosed in 75 participants (3.77%), four (5.3%) with long-segment BE and 71 (94.7%) with short-segment BE. Low-grade dysplasia was noticed in 1 patient with long-segment BE. Hiatal hernia (HH) was found in 196 patients (9.8%), and mean HH length was 3.22 +/- 0.2 cm. BE was correlated to EE, GERD and the presence of HH (p= 0.0167, Descriptors Links Book Title Database Publisher Data Source Authors Katsinelos,P., Lazaraki,G., Kountouras,J., Chatzimavroudis,G., Zavos,C., Terzoudis,S., Tsiaousi,E., Gkagkalis,S., Trakatelli,C., Bellou,A., Vasiliadis,T. Original/Translated Title URL Date of Electronic PMCID PMC3738273 Editors
Short segment Barrett's esophagus and distal gastric intestinal metaplasia	2006	Department of Endoscopy and Pathology, "Hospital Nossa Senhora da Conceicao" and "Hospital de Clinicas", Porto Alegre, RS, Brazil.	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Arquivos de Gastroenterologia Periodical, Abbrev. Arq.Gastroenterol. Pub Date Free Form Apr-Jun Volume 43 Issue 2 Start Page 117 Other Pages 120 Notes JID: 15310600R; 2005/08/31 [received]; 2006/01/04 [accepted]; ppublish Place of Publication Brazil ISSN/ISBN 0004-2803; 0004-2803 Accession Number PMID: 17119666 Language eng SubFile Journal Article; IM DOI S0004-28032006000200011 [pii] Output Language Unknown(0) PMID 17119666 Abstract BACKGROUND: Short segment Barrett's esophagus is defined by the presence of <3 cm of columnar-appearing mucosa in the distal esophagus with intestinal metaplasia on histophatological examination. Barrett's esophagus is a risk factor to develop adenocarcinoma of the esophagus. While Barrett's esophagus develops as a result of chronic gastroesophageal reflux disease, intestinal metaplasia in the gastric cardia is a consequence of chronic Helicobacter pylori infection and is associated with distal gastric intestinal metaplasia. It can be difficult to determine whether short-segment columnar epithelium with intestinal metaplasia are lining the esophagus (a condition called short segment Barrett's esophagus) or the proximal stomach (a condition called intestinal metaplasia of the gastric cardia). AIMS: To study the association of short segment Barrett's esophagus (length <3 cm) with gastric intestinal metaplasia (antrum or body) and infection by H. pylori. PATIENTS AND METHODS: Eight-nine patients with short segment columnar-appearing mucosa in the esophagus, length <3 cm, were studied. Symptoms of gastroesophageal reflux disease were recorded. Biopsies were obtained immediately below the squamous-columnar lining, from gastric antrum and gastric corpus for investigation of intestinal metaplasia and H. pylori. RESULTS: Forty-two from 89 (47.2%) patients were diagnosed with esophageal intestinal metaplasia by histopathology. The mean-age was significantly higher in the group with esophageal intestinal metaplasia. The two groups were similar in terms of gender (male: female), gastroesophageal reflux disease symptoms and H. pylori infection. Gastric intestinal metaplasia (antrum or body) was diagnosed in 21 from 42 (50.0%) patients in the group with esophageal intestinal metaplasia and 7 from 47 (14.9%) patients in the group with esophageal columnar appearing mucosa but without intestinal metaplasia. CONCLUSION: Intestinal metaplasia is a frequent finding in patients with <3 cm of columnar-appearing mucosa in the distal esophagus. In the present study, short segment intestinal metaplasia in the esophagus is associated with distal gastric intestinal metaplasia. Gastroesophageal reflux disease symptoms and H. pylori infection did not differ among the two groups studied. Descriptors Barrett Esophagus/complications/pathology, Biopsy, Cardia/pathology, Esophagoscopy, Female, Gastritis/microbiology/pathology, Gastroesophageal Reflux/complications/pathology, Helicobacter Infections/complications/pathology, Humans, Intestines/pathology, Male, Metaplasia/pathology, Middle Aged, Stomach/pathology Links Book Title Database Publisher Data Source Authors Dietz,J., Chaves-E-Silva,S., Meurer,L., Sekine,S., de Souza,A. R., Meine,G. C. Original/Translated Title URL Date of Electronic PMCID Editors
Optimization of ultrasonic-assisted extraction for determination of polycyclic aromatic hydrocarbons in biochar-based fertilizer by gas chromatography-mass spectrometry	2015	Department of Environment and Resource, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, 200240, China.	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Analytical and bioanalytical chemistry Periodical, Abbrev. Anal.Bioanal Chem. Pub Date Free Form Aug Volume 407 Issue 20 Start Page 6149 Other Pages 6157 Notes LR: 20160512; JID: 101134327; 0 (Fertilizers); 0 (Polycyclic Hydrocarbons, Aromatic); 0 (Solvents); 0 (biochar); 16291-96-6 (Charcoal); 2015/02/06 [received]; 2015/05/19 [accepted]; 2015/04/11 [revised]; 2015/06/06 [aheadofprint]; ppublish Place of Publication Germany ISSN/ISBN 1618-2650; 1618-2642 Accession Number PMID: 26048058 Language eng SubFile Journal Article; Research Support, Non-U.S. Gov't; Validation Studies; IM DOI 10.1007/s00216-015-8790-3 [doi] Output Language Unknown(0) PMID 26048058 Abstract Application of biochar-based fertilizers is increasingly being considered for its potential agronomic and environmental benefits. However, biochar may contain residues of polycyclic aromatic hydrocarbons (PAHs) as a result of its production by pyrolysis. The strong adsorption of PAHs to biochar makes extraction and analysis of biochar-based fertilizers difficult. This study optimizes the extraction of PAHs in biochar-based fertilizer samples by using an ultrasonic bath for quantification by gas chromatography-mass spectrometry. Among 12 solvents, acetone-cyclohexane (1:1) mixture was selected as the optimum solvent for extraction. Three variables affecting the extraction were studied by Box-Behnken design. The optimum conditions were 57 degrees C extraction temperature, 81 min extraction time, and two extraction cycles, which were validated by assessing the linearity of analysis, LOD, LOQ, recovery, and levels of PAHs in real biochar-based fertilizer samples. Results revealed that the 16 U.S. EPA PAHs had good linearity, with squared correlation coefficients greater than 0.99. LODs were low, ranging from 2.2 ng g(-1) (acenaphthene) to 23.55 ng g(-1) (indeno[1,2,3-cd]perylene), and LOQs varied from 7.51 ng g(-1) to 78.49 ng g(-1). The recoveries of 16 individual PAHs from the three biochar-based fertilizer samples were 81.8-109.4 %. Graphical Abstract Use of RSM to optimize UAE for extraction of the PAHs in biochar-based fertilizer. Descriptors Links Book Title Database Publisher Data Source Authors Chen,P., Sun,M., Zhu,Z., Zhang,J., Shen,G. Original/Translated Title URL Date of Electronic 20150606 PMCID Editors
Secondhand smoke levels in Scottish pubs: the effect of smoke-free legislation	2007	Department of Environmental & Occupational Medicine, University of Aberdeen, Aberdeen, AB25 2ZP, UK. sean.semple@abdn.ac.uk	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Tobacco control Periodical, Abbrev. Tob.Control Pub Date Free Form Apr Volume 16 Issue 2 Start Page 127 Other Pages 132 Notes LR: 20140907; JID: 9209612; 0 (Air Pollutants, Occupational); 0 (Particulate Matter); 0 (Tobacco Smoke Pollution); OID: NLM: PMC2598470; ppublish Place of Publication England ISSN/ISBN 1468-3318; 0964-4563 Accession Number PMID: 17400951 Language eng SubFile Comparative Study; Journal Article; Research Support, Non-U.S. Gov't; IM DOI 16/2/127 [pii] Output Language Unknown(0) PMID 17400951 Abstract OBJECTIVE: To compare levels of particulate matter, as a marker of secondhand smoke (SHS) levels, in pubs before and 2 months after the implementation of Scottish legislation to prohibit smoking in substantially enclosed public places. DESIGN: Comparison of SHS levels before and after the legislation in a random selection of 41 pubs in 2 Scottish cities. METHODS: Fine particulate matter <2.5 microm in diameter (PM2.5) was measured discreetly for 30 min in each bar on 1 or 2 visits in the 8 weeks preceding the starting date of the Smoking, Health and Social Care (Scotland) Act 2005 and then again 2 months after the ban. Repeat visits were undertaken on the same day of the week and at approximately the same time of the day. RESULTS: PM2.5 levels before the introduction of the legislation averaged 246 microg/m3 (range 8-902 microg/m3). The average level reduced to 20 microg/m3 (range 6-104 microg/m3) in the period after the ban. Levels of SHS were reduced in all 53 post-ban visits, with the average reduction being 86% (range 12-99%). PM2.5 concentrations in most pubs post-ban were comparable to the outside ambient air PM2.5 level. CONCLUSIONS: This study has produced the largest dataset of pre- and post-ban SHS levels in pubs of all worldwide smoke-free legislations introduced to date. Our results show that compliance with the Smoking, Health and Social Care (Scotland) Act 2005 has been high and this has led to a marked reduction in SHS concentrations in Scottish pubs, thereby reducing both the occupational exposure of workers in the hospitality sector and that of non-smoking patrons. Descriptors Air Pollutants, Occupational/analysis, Air Pollution, Indoor/analysis/legislation & jurisprudence/prevention & control, Environmental Monitoring/methods, Guideline Adherence, Humans, Particulate Matter/analysis, Scotland, Smoking/legislation & jurisprudence/prevention & control, Tobacco Smoke Pollution/analysis/legislation & jurisprudence/prevention & control Links Book Title Database Publisher Data Source Authors Semple,S., Creely,K. S., Naji,A., Miller,B. G., Ayres,J. G. Original/Translated Title URL Date of Electronic PMCID PMC2598470 Editors
Prospective study of effect of switching from cigarettes to pipes or cigars on mortality from three smoking related diseases	1997	Department of Environmental and Preventive Medicine, Wolfson Institute of Preventive Medicine, St Bartholomew's, London.	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full BMJ (Clinical research ed.) Periodical, Abbrev. BMJ Pub Date Free Form 28-Jun Volume 314 Issue 7098 Start Page 1860 Other Pages 1863 Notes LR: 20081120; JID: 8900488; 9061-29-4 (Carboxyhemoglobin); CIN: ACP J Club. 1998 Jan-Feb;128(1):18; CIN: BMJ. 1998 Mar 14;316(7134):862. PMID: 9549471; CIN: BMJ. 1998 Mar 14;316(7134):862; author reply 863-4. PMID: 9549472; CIN: BMJ. 1998 Mar 14;316(7134) Place of Publication ENGLAND ISSN/ISBN 0959-8138; 0959-535X Accession Number PMID: 9224127 Language eng SubFile Journal Article; Research Support, Non-U.S. Gov't; AIM; IM DOI Output Language Unknown(0) PMID 9224127 Abstract OBJECTIVE: To estimate the extent to which cigarette smokers who switch to cigars or pipes alter their risk of dying of three-smoking related diseases-lung cancer, ischaemic heart disease, and chronic obstructive lung disease. DESIGN: A prospective study of 21520 men aged 35-64 years when recruited in 1975-82 with detailed history of smoking and measurement of carboxyhaemoglobin. MAIN OUTCOME MEASURES: Notification of deaths (to 1993) classified by cause. RESULTS: Pipe and cigar smokers who had switched from cigarettes over 20 years before entry to the study smoked less tobacco than cigarette smokers (8.1 g/day v 20 g/day), but they had the same consumption as pipe and cigar smokers who had never smoked cigarettes (8.1 g) and had higher carboxyhaemoglobin saturations (1.2% v 1.0%, P < 0.001), indicating that they inhaled tobacco smoke to a greater extent. They had a 51% higher risk of dying of the three smoking related diseases than pipe or cigar smokers who had never smoked cigarettes (relative risk 1.51; 95% confidence interval 0.96 to 2.38), a 68% higher risk than lifelong non-smokers (1.68; 1.16 to 2.45), a 57% higher risk than former cigarette smokers who gave up smoking over 20 years before entry (1.57; 1.04 to 2.38), and a 46% lower risk than continuing cigarette smokers (0.54; 0.38 to 0.77). CONCLUSION: Cigarette smokers who have difficulty in giving up smoking altogether are better off changing to cigars or pipes than continuing to smoke cigarettes. Much of the effect is due to the reduction in the quantity of tobacco smoked, and some is due to inhaling less. Men who switch do not, however, achieve the lower risk of pipe and cigar smokers who have never smoked cigarettes. All pipe and cigar smokers have a greater risk of lung cancer than lifelong non-smokers or former smokers. Descriptors Adult, Carboxyhemoglobin/analysis, Choice Behavior, Humans, Lung Diseases, Obstructive/mortality, Lung Neoplasms/mortality, Male, Middle Aged, Myocardial Ischemia/mortality, Prospective Studies, Risk Assessment, Risk Factors, Smoking/mortality/psychology Links Book Title Database Publisher Data Source Authors Wald,N. J., Watt,H. C. Original/Translated Title URL Date of Electronic PMCID PMC2126967 Editors
Secondary effects of anion exchange on chloride, sulfate, and lead release: systems approach to corrosion control	2012	Department of Environmental Engineering Sciences, University of Florida, P.O. Box 116450, Gainesville, FL 32611-6450, USA.	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Water research Periodical, Abbrev. Water Res. Pub Date Free Form 1-May Volume 46 Issue 7 Start Page 2385 Other Pages 2394 Notes LR: 20131121; CI: Copyright A(c) 2012; JID: 0105072; 0 (Anions); 0 (Chlorides); 0 (Sulfates); 0 (Water Pollutants, Chemical); 2P299V784P (Lead); 2011/11/03 [received]; 2012/02/02 [revised]; 2012/02/04 [accepted]; 2012/02/14 [aheadofprint]; ppublish Place of Publication England ISSN/ISBN 1879-2448; 0043-1354 Accession Number PMID: 22374301 Language eng SubFile Comparative Study; Journal Article; Research Support, Non-U.S. Gov't; IM DOI 10.1016/j.watres.2012.02.010 [doi] Output Language Unknown(0) PMID 22374301 Abstract Water treatment processes can cause secondary changes in water chemistry that alter finished water quality including chloride, sulfate, natural organic matter (NOM), and metal release. Hence, the goal of this research was to provide an improved understanding of the chloride-to-sulfate mass ratio (CSMR) with regards to chloride and sulfate variations at full-scale water treatment plants and corrosion potential under simulated premise plumbing conditions. Laboratory corrosion studies were conducted using Pb-Sn solder/Cu tubing galvanic cells exposed to model waters with low (approx. 5 mg/L Cl(-) and 10 mg/L SO(4)(2-)) and high (approx. 50 mg/L Cl(-) and 100 mg/L SO(4)(2-)) concentrations of chloride and sulfate at a constant CSMR of approximately 0.5. The role of NOM during corrosion was also evaluated by changing the type of organic material. In addition, full-scale sampling was conducted to quantify the raw water variability of chloride, sulfate, and NOM concentrations and the changes to these parameters from magnetic ion exchange treatment. Test conditions with higher concentrations of chloride and sulfate released significantly more lead than the lower chloride and sulfate test waters. In addition, the source of NOM was a key factor in the amount of lead released with the model organic compounds yielding significantly less lead release than aquatic NOM. Descriptors Links Book Title Database Publisher Elsevier Ltd Data Source Authors Willison,H., Boyer,T.H. Original/Translated Title URL Date of Electronic 20120214 PMCID Editors
Multi-route trihalomethane exposure in households using municipal tap water treated with chlorine or ozone-chlorine	2005	Department of Environmental Engineering, Kyungpook National University, Daegu 702-701, Korea. wkjo@knu.ac.kr	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full The Science of the total environment Periodical, Abbrev. Sci.Total Environ. Pub Date Free Form 1-Mar Volume 339 Issue 3-Jan Start Page 143 Other Pages 152 Notes LR: 20131121; JID: 0330500; 0 (Trihalomethanes); 124-48-1 (chlorodibromomethane); 4R7X1O2820 (Chlorine); 66H7ZZK23N (Ozone); 7LN464CH2O (bromodichloromethane); 7V31YC746X (Chloroform); 2004/03/22 [received]; 2004/07/22 [accepted]; ppublish Place of Publication Netherlands ISSN/ISBN 0048-9697; 0048-9697 Accession Number PMID: 15740765 Language eng SubFile Journal Article; Research Support, Non-U.S. Gov't; IM DOI S0048-9697(04)00573-X [pii] Output Language Unknown(0) PMID 15740765 Abstract In Korea, data for multi-route trihalomethane (THM) exposure in households using municipal tap water treated with ozone-chlorine or chlorine are unavailable or very limited. Accordingly, the present study was designed to obtain those data by measurements of the THM concentrations in the tap water and indoor and outdoor air in the two types of households, along with an estimation of THM exposure from water ingestion, showering, and the inhalation of indoor air. Chloroform was the most abundant THM in all three media, yet no bromoform was detected in any sample. Similar to previous findings, the winter chloroform concentration in tap water treated with chlorine (22.1 microg/l, median) was significantly higher than that in the tap water treated with ozone-chlorine (16.8 microg/l, median). However, the summer water chloroform concentrations and summer and winter water concentrations of the other two THMs (bromodichloromethane and dibromochloromethane) exhibited no significant difference between the chlorine and ozone-chlorine-treated water. It was suggested that the effects of the water parameters including biochemical oxygen demand of raw water entering water treatment plants should be considered when evaluating the advantage of ozone-chlorine disinfection for THM formation over chlorine disinfection. The indoor air THM concentration trend was also consistent with the water concentration trend. The indoor to outdoor air concentration ratios were comparable with previous studies. The THM exposure estimates from water ingestion, showering, and the inhalation of apartment indoor air when not in the shower suggested that, for residents living in the surveyed households, their exposure to THMs in the home was mostly associated with their household water uses. The THM exposure estimates from tap water ingestion were similar to those from showering. Descriptors Chlorine/chemistry, Chloroform/analysis, Cities, Disinfection, Environmental Exposure, Family Characteristics, Humans, Ozone/chemistry, Seasons, Trihalomethanes/analysis/toxicity, Water Purification/methods Links Book Title Database Publisher Data Source Authors Jo,W. K., Kwon,K. D., Dong,J. I., Chung,Y. Original/Translated Title URL Date of Electronic PMCID Editors
Solid-phase microextraction to monitor the sonochemical degradation of polycyclic aromatic hydrocarbons in water	2003	Department of Environmental Engineering, Technical University of Crete, Polytechneioupolis, GR-73100 Chania, Greece. epsilaki@mred.tuc.gr	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Journal of environmental monitoring : JEM Periodical, Abbrev. J.Environ.Monit. Pub Date Free Form Feb Volume 5 Issue 1 Start Page 135 Other Pages 140 Notes LR: 20061115; JID: 100968688; 0 (Polycyclic Hydrocarbons, Aromatic); 0 (Water Pollutants, Chemical); ppublish Place of Publication England ISSN/ISBN 1464-0325; 1464-0325 Accession Number PMID: 12619768 Language eng SubFile Journal Article; IM DOI Output Language Unknown(0) PMID 12619768 Abstract Solid-phase microextraction (SPME) coupled with GC-MS has been used to monitor the degradation of polycyclic aromatic hydrocarbons (PAHs) by ultrasound treatment. Immersion SPME sampling enabled the fast and solventless extraction of target contaminants at the low microg l(-1) concentration level. The developed protocol was found to be linear in the concentration range from 0.1 to 50 microg l(-1) for most target analytes, with the limits of detection ranging between 0.01 and 0.70 microg l(-1) and the relative standard deviations between 4.31 and 27%. The developed SPME protocol was used to follow concentration profiles of aqueous solutions containing 16 PAHs, which were subject to low frequency ultrasonic irradiation. At the conditions employed in this study (80 kHz of ultrasound frequency, 130 W l(-1) of applied electric power density, 30 microg l(-1) of initial concentration for each of the 16 PAHs), sonochemical treatment was found capable of destroying the lower molecular weight PAHs (naphthalene, acenaphthylene, acenaphthene, fluorene, phenanthrene, anthracene, fluoranthene and pyrene) within 120-180 min of irradiation. The higher molecular weight PAHs were more recalcitrant to ultrasound treatment. Descriptors Environmental Monitoring/methods, Gas Chromatography-Mass Spectrometry, Molecular Weight, Polycyclic Hydrocarbons, Aromatic/analysis/chemistry, Ultrasonics, Water Pollutants, Chemical/analysis, Water Purification/methods Links Book Title Database Publisher Data Source Authors Psillakis,E., Ntelekos,A., Mantzavinos,D., Nikolopoulos,E., Kalogerakis,N. Original/Translated Title URL Date of Electronic PMCID Editors
Analysis of polycyclic aromatic hydrocarbons in wastewater treatment plant effluents using hollow fibre liquid-phase microextraction	2005	Department of Environmental Engineering, Technical University of Crete, Polytechneioupolis, University Campus, GR-73100, Chania, Crete, Greece.	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Chemosphere Periodical, Abbrev. Chemosphere Pub Date Free Form Jul Volume 60 Issue 5 Start Page 690 Other Pages 698 Notes LR: 20091119; JID: 0320657; 0 (Polycyclic Hydrocarbons, Aromatic); 0 (Water Pollutants, Chemical); 2004/02/17 [received]; 2004/12/22 [revised]; 2005/01/12 [accepted]; 2005/03/03 [aheadofprint]; ppublish Place of Publication England ISSN/ISBN 0045-6535; 0045-6535 Accession Number PMID: 15963807 Language eng SubFile Journal Article; IM DOI S0045-6535(05)00188-8 [pii] Output Language Unknown(0) PMID 15963807 Abstract A simple and efficient method for the enrichment of low molecular weight polycyclic aromatic hydrocarbons (PAHs) in effluents originating from wastewater treatment plants is presented here. The proposed protocol couples the recently introduced hollow fibre liquid-phase microextraction (LPME) method with gas chromatography-mass spectrometry. Method parameters were controlled and the optimised experimental conditions were: 5 ml aqueous samples, containing 2.5% NaCl w/v, stirred at 1000 rpm, extracted with toluene for 15 min. The developed protocol yielded a linear calibration curve in the concentration range from 0.5 to 50 microg l(-1) for all target analytes (namely acenaphthene, phenanthrene, fluoranthene and pyrene) and limits of detection in the low microg l(-1) level (0.005-0.011 microg l(-1)). The repeatability and inter-day precision of the method varied between 2.7% and 11.3% and 7.9% and 14.4% respectively. The relative recoveries from different types of natural water samples revealed that matrix had a small effect on the hollow fibre LPME process. The developed method was then applied for the determination of PAHs contamination in effluent samples taken from two major municipal wastewater treatment plants. The results were compared with those obtained with solid-phase microextraction. The ability of both microextraction methods to concentrate organic analytes was demonstrated as both methods confirmed the presence of PAHs as well as of phthalates in the examined effluent samples. Descriptors Chemistry Techniques, Analytical/methods, Environmental Monitoring/instrumentation/methods, Equipment Design, Gas Chromatography-Mass Spectrometry, Polycyclic Hydrocarbons, Aromatic/analysis, Waste Disposal, Fluid, Water Pollutants, Chemical/analysis Links Book Title Database Publisher Data Source Authors Charalabaki,M., Psillakis,E., Mantzavinos,D., Kalogerakis,N. Original/Translated Title URL Date of Electronic 20050303 PMCID Editors

E-mail