WTS database

Title	Pub Year	Author Sort descending	SearchLink
Identification of Coccoidal Bacteria in Traditional Fermented Milk Products from Mongolia, and the Fermentation Properties of the Predominant Species, Streptococcus thermophilus	2015	Key Laboratory of Dairy Biotechnology and Engineering, Education Ministry of P. R. China, Department of Food Science and Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China.; Key Laboratory of Dairy Biotechnology and Engineering, Edu	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Korean journal for food science of animal resources Periodical, Abbrev. Korean J.Food Sci.Anim.Resour. Pub Date Free Form Volume 35 Issue 5 Start Page 683 Other Pages 691 Notes LR: 20160115; JID: 101660566; OID: NLM: PMC4670899; OTO: NOTNLM; 2015/05/19 [received]; 2015/09/25 [revised]; 2015/09/26 [accepted]; 2015/10/31 [epublish]; ppublish Place of Publication Korea (South) ISSN/ISBN 1225-8563; 1225-8563 Accession Number PMID: 26761898 Language eng SubFile Journal Article DOI 10.5851/kosfa.2015.35.5.683 [doi] Output Language Unknown(0) PMID 26761898 Abstract The objective of this study was to identify the coccoidal bacteria present in 188 samples of fermented yaks', mares' and cows' milk products collected from 12 different regions in Mongolia. Furthermore, we evaluated the fermentation properties of ten selected isolates of the predominant species, Streptococcus (S.) thermophiles, during the process of milk fermentation and subsequent storage of the resulting yoghurt at 4. Overall, 159 isolates were obtained from 188 samples using M17 agar. These isolates were presumed to be lactic acid bacteria based on their gram-positive and catalase-negative properties, and were identified to species level using 16S rRNA gene sequence analysis. These coccoid isolates were distributed in four genera and six species: Enterococcus (E.) durans, Enterococcus (E.) faecalis, Lactococcus (Lac.) subsp. lactis, Leuconostoc (Leuc.) lactis, Leuconostoc (Leuc.) mesenteroides. subsp. mesenteroides and S. thermophilus. Among these S. thermophilus was the most common species in most samples. From evaluation of the fermentation characteristics (viable counts, pH, titratable acidity [TA]) of ten selected S. thermophilus isolates we could identify four isolates (IMAU 20246, IMAU20764, IMAU20729 and IMAU20738) that were fast acid producers. IMAU20246 produced the highest concentrations of lactic acid and formic acid. These isolates have potential as starter cultures for yoghurt production. Descriptors Links Book Title Database Publisher Data Source Authors Ren,Y., Liu,W., Zhang,H. Original/Translated Title URL Date of Electronic 20151031 PMCID PMC4670899 Editors
Diversity of lactic acid bacteria associated with traditional fermented dairy products in Mongolia	2011	Key Laboratory of Dairy Biotechnology and Engineering, Education Ministry of P. R. China, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010018, P. R. China.	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Journal of dairy science Periodical, Abbrev. J.Dairy Sci. Pub Date Free Form Jul Volume 94 Issue 7 Start Page 3229 Other Pages 3241 Notes CI: Copyright (c) 2011; JID: 2985126R; 0 (RNA, Bacterial); 0 (RNA, Ribosomal, 16S); 2010/08/16 [received]; 2011/03/18 [accepted]; ppublish Place of Publication United States ISSN/ISBN 1525-3198; 0022-0302 Accession Number PMID: 21700007 Language eng SubFile Journal Article; Research Support, Non-U.S. Gov't; IM DOI 10.3168/jds.2010-3727 [doi] Output Language Unknown(0) PMID 21700007 Abstract Spontaneous milk fermentation has a long history in Mongolia, and beneficial microorganisms have been handed down from one generation to the next for use in fermented dairy products. The objective of this study was to investigate the diversity of lactic acid bacteria (LAB) communities in fermented yak, mare, goat, and cow milk products by analyzing 189 samples collected from 13 different regions in Mongolia. The LAB counts in these samples varied from 3.41 to 9.03 log cfu/mL. Fermented yak and mare milks had almost identical mean numbers of LAB, which were significantly higher than those in fermented goat milk but slightly lower than those in fermented cow milk. In total, 668 isolates were obtained from these samples using de Man, Rogosa, and Sharpe agar and M17 agar. Each isolate was considered to be presumptive LAB based on gram-positive and catalase-negative properties, and was identified at the species level by 16S rRNA gene sequencing, multiplex PCR assay, and restriction fragment length polymorphism analysis. All isolates from Mongolian dairy products were accurately identified as Enterococcus faecalis (1 strain), Enterococcus durans (3 strains), Lactobacillus brevis (3 strains), Lactobacillus buchneri (2 strains), Lactobacillus casei (16 strains), Lactobacillus delbrueckii ssp. bulgaricus (142 strains), Lactobacillus diolivorans (17 strains), Lactobacillus fermentum (42 strains), Lactobacillus helveticus (183 strains), Lactobacillus kefiri (6 strains), Lactobacillus plantarum ssp. plantarum (7 strains), Lactococcus lactis ssp. lactis (7 strains), Leuconostoc lactis (22 strains), Leuconostoc mesenteroides (21 strains), Streptococcus thermophilus (195 strains), and Weissella cibaria (1 strain). The predominant LAB were Strep. thermophilus and Lb. helveticus, which were isolated from all sampling sites. The results demonstrate that traditional fermented dairy products from different regions of Mongolia have complex compositions of LAB species. Such diversity of LAB provides useful information for further studies of probiotic strain selection and starter culture design, with regard to the industrial production of traditional fermented milk. Descriptors Links Book Title Database Publisher American Dairy Science Association. Published by Elsevier Inc Data Source Authors Yu,J., Wang,W.H., Menghe,B.L., Jiri,M.T., Wang,H.M., Liu,W.J., Bao,Q.H., Lu,Q., Zhang,J.C., Wang,F., Xu,H.Y., Sun,T.S., Zhang,H.P. Original/Translated Title URL Date of Electronic PMCID Editors
Molecular identification and quantification of lactic acid bacteria in traditional fermented dairy foods of Russia	2015	Key Laboratory of Dairy Biotechnology and Engineering, Education Ministry of P. R. China, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010018, P. R. China.; Key Laboratory of Dairy Biotechnology and Engineering, Education Ministry of P.	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Journal of dairy science Periodical, Abbrev. J.Dairy Sci. Pub Date Free Form Aug Volume 98 Issue 8 Start Page 5143 Other Pages 5154 Notes CI: Copyright (c) 2015; GENBANK/KC836519; GENBANK/KC836520; GENBANK/KC836521; GENBANK/KC836522; GENBANK/KC836523; GENBANK/KC836524; GENBANK/KC836525; GENBANK/KC836526; GENBANK/KC836527; GENBANK/KC836528; GENBANK/KC836529; GENBANK/KC836530; GENBANK/KC83653 Place of Publication United States ISSN/ISBN 1525-3198; 0022-0302 Accession Number PMID: 26004836 Language eng SubFile Journal Article; Research Support, Non-U.S. Gov't; IM DOI 10.3168/jds.2015-9460 [doi] Output Language Unknown(0) PMID 26004836 Abstract Russian traditional fermented dairy foods have been consumed for thousands of years. However, little research has focused on exploiting lactic acid bacteria (LAB) resources and analyzing the LAB composition of Russian traditional fermented dairy foods. In the present study, we cultured LAB isolated from fermented mare and cow milks, sour cream, and cheese collected from Kalmykiya, Buryats, and Tuva regions of Russia. Seven lactobacillus species and the Bifidobacterium genus were quantified by quantitative PCR. The LAB counts in these samples ranged from 3.18 to 9.77 log cfu/mL (or per gram). In total, 599 LAB strains were obtained from these samples using de Man, Rogosa, and Sharpe agar and M17 agar. The identified LAB belonged to 7 genera and 30 species by 16S rRNA and murE gene sequencing and multiplex PCR assay. The predominant LAB isolates were Lactobacillus helveticus (176 strains) and Lactobacillus plantarum (63 strains), which represented 39.9% of all isolates. The quantitative PCR results revealed that counts of 7 lactobacilli species and Bifidobacterium spp. of 30 fermented cow milk samples ranged from 1.19+/-0.34 (Lactobacillus helveticus in Tuva) to 8.09+/-0.71 (Lactobacillus acidophilus in Kalmykiya) log cfu/mL of fermented cow milk (mean +/- standard error). The numbers of Bifidobacterium spp., Lb. plantarum, Lb. helveticus, and Lb. acidophilus revealed no significant difference between the 3 regions; nevertheless, Lactobacillus paracasei, Lactobacillus fermentum, Lactobacillus sakei, and Lactobacillus delbrueckii ssp. bulgaricus exhibited different degrees of variation across 3 regions. The results demonstrate that traditional fermented dairy products from different regions of Russia have complex compositions of LAB species. The diversity of LAB might be related to the type of fermented dairy product, geographical origin, and manufacturing process. Descriptors Links Book Title Database Publisher American Dairy Science Association. Published by Elsevier Inc Data Source Authors Yu,J., Wang,H.M., Zha,M.S., Qing,Y.T., Bai,N., Ren,Y., Xi,X.X., Liu,W.J., Menghe,B.L., Zhang,H.P. Original/Translated Title URL Date of Electronic 20150523 PMCID Editors
Investigating bacterial population structure and dynamics in traditional koumiss from Inner Mongolia using single molecule real-time sequencing	2016	Key Laboratory of Dairy Biotechnology and Engineering, Ministry of Education, Inner Mongolia Agricultural University, Huhhot, 010018 China; Dairy Processing Laboratory of National Dairy Production Technology and Research Center, Huhhot, Inner Mongolia, Ch	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Journal of dairy science Periodical, Abbrev. J.Dairy Sci. Pub Date Free Form 10-Aug Volume Issue Start Page Other Pages Notes LR: 20160814; CI: Copyright (c) 2016; JID: 2985126R; OTO: NOTNLM; 2016/03/14 [received]; 2016/07/03 [accepted]; aheadofprint Place of Publication ISSN/ISBN 1525-3198; 0022-0302 Accession Number PMID: 27522429 Language ENG SubFile JOURNAL ARTICLE DOI S0022-0302(16)30539-2 [pii] Output Language Unknown(0) PMID 27522429 Abstract Koumiss is considered as a complete dairy product high in nutrients and with medicinal properties. The bacterial communities involved in production of koumiss play a crucial role in the fermentation cycle. To reveal bacterial biodiversity in koumiss and the dynamics of succession in bacterial populations during fermentation, 22 samples were collected from 5 sampling sites and the full length of the 16S ribosomal RNA genes sequenced using single molecule real-time sequencing technology. One hundred forty-eight species were identified from 82 bacterial genera and 8 phyla. These results suggested that the structural difference in the bacterial community could be attributed to geographical location. The most significant difference in bacterial composition occurred in samples from group D compared with other groups. The sampling location of group D was distant from the city and maintained the primitive local nomadic life. The dynamics of succession in bacterial communities showed that Lactobacillus helveticus increased in abundance from 0 to 9 h and reached its peak at 9 h and then decreased. In contrast, Enterococcus faecalis, Enterococcus durans, and Enterococcus casseliflavus increased gradually throughout the fermentation process, and reached a maximum after 24 h. Descriptors Links Book Title Database Publisher American Dairy Science Association. Published by Elsevier Inc Data Source Authors Gesudu,Q., Zheng,Y., Xi,X., Hou,Q.C., Xu,H., Huang,W., Zhang,H., Menghe,B., Liu,W. Original/Translated Title URL Date of Electronic 20160810 PMCID Editors
Isolation and identification of cultivable lactic acid bacteria in traditional yak milk products of Gansu Province in China	2012	Key Laboratory of Dairy Biotechnology and Engineering, Ministry of Education, Inner Mongolia Agricultural University.	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full The Journal of general and applied microbiology Periodical, Abbrev. J.Gen.Appl.Microbiol. Pub Date Free Form Volume 58 Issue 2 Start Page 95 Other Pages 105 Notes LR: 20131121; GENBANK/HM058717; GENBANK/HM058718; GENBANK/HM058719; GENBANK/HM058720; GENBANK/HM058721; GENBANK/HM058722; GENBANK/HM058723; GENBANK/HM058724; GENBANK/HM058725; GENBANK/HM058726; GENBANK/HM058727; GENBANK/HM058728; GENBANK/HM058729; GENBANK Place of Publication Japan ISSN/ISBN 1349-8037; 0022-1260 Accession Number PMID: 22688240 Language eng SubFile Journal Article; Research Support, Non-U.S. Gov't; IM DOI DN/JST.JSTAGE/jgam/58.95 [pii] Output Language Unknown(0) PMID 22688240 Abstract Various traditional fermented yak milk and raw milk foods could be considered as an abundant resource for obtaining novel lactic acid bacteria (LAB) with unique properties. Eighty-eight samples of yak milk products were collected from Gansu Province in China. Three hundred and nineteen strains of LAB isolated from these samples were identified by phenotypic methods, 16S rRNA gene sequence analysis and PCR-Denaturing Gradient Gel Electrophoresis (PCR-DGGE) technology. Among the isolates, one hundred and sixty-four isolates (51.41% of the total) were classified under Lactobacilli, and one hundred and fifty-five (48.59%) belonged to cocci. All the isolates were classified to six genera (Lactobacillus, Lactococcus, Leuconostoc, Streptococcus, Enterococcus and Weissella) and twenty-one species. Lactobacillus helveticus (87 strains), Leuconostoc mesenteroides subsp. mesenteroides (49 strains), Streptococcus thermophilus (39 strains), Lactobacillus casei (31 strains) and Lactococcus lactis subsp. lactis (19 strains) were considered as the predominant populations in the yak milk products. The results showed that there were abundant genus and species LAB existing in yak milk products in Gansu Province in China. The obtained LAB pure cultures may be a valuable source for further starter selection. Descriptors Links Book Title Database Publisher Data Source Authors Bao,Q., Liu,W., Yu,J., Wang,W., Qing,M., Chen,X., Wang,F., Zhang,J., Zhang,W., Qiao,J., Sun,T., Zhang,H. Original/Translated Title URL Date of Electronic PMCID Editors
Enhanced formation of bromate and brominated disinfection byproducts during chlorination of bromide-containing waters under catalysis of copper corrosion products	2016	Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuang-qing Road, Beijing 100085, China; University of Chinese Academy of Sciences, 19 Yu-quan Road, Beijing 100049, C	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Water research Periodical, Abbrev. Water Res. Pub Date Free Form 1-Jul Volume 98 Issue Start Page 302 Other Pages 308 Notes CI: Copyright (c) 2016; JID: 0105072; OTO: NOTNLM; 2016/02/06 [received]; 2016/04/12 [revised]; 2016/04/15 [accepted]; 2016/04/19 [aheadofprint]; ppublish Place of Publication England ISSN/ISBN 1879-2448; 0043-1354 Accession Number PMID: 27110886 Language eng SubFile Journal Article; IM DOI 10.1016/j.watres.2016.04.033 [doi] Output Language Unknown(0) PMID 27110886 Abstract Copper corrosion products (CCPs) in water distribution pipes may catalyze the reactions among disinfectant, natural organic matter (NOM), and bromide (Br(-)). This study investigated the simultaneous formation of bromate (BrO3(-)) and brominated disinfection byproducts (Br-DBPs) during chlorination of Br(-)-containing waters in the presence of three CCPs (i.e., CuO, Cu2O, and Cu(2+)). In a synthetic water, both oxidant decay and BrO3(-) formation were enhanced by CCPs, whereas the presence of humic acid (HA) significantly inhibited BrO3(-) formation due to its competition for HOBr to form Br-DBPs. In the HOClBr(-)CuO system, the BrO3(-) yield increased obviously with increasing CuO dose and initial Br(-) concentration, while the catalytic formation of Br-DBPs was rather limited. A molar conversion (Br(-) to BrO3(-)) of 22.1% was observed under CuO catalysis, compared with little conversion in the absence of CuO. In the HOClBr(-)Cu2O/Cu(2+) systems, Cu2O or Cu(2+) mainly enhanced the formation of Br-DBPs, with enhancement ratios of 69.9% and 50.1%, respectively. The degree of enhancement on Br-DBPs formation became more apparent with increasing pH, while that on BrO3(-) formation reached maximal at pH 7.6. The catalytic formation of Br-DBPs and BrO3(-) by CCPs was also verified in three filtered real waters, although to a lesser extent because of the water matrix effect. In mechanism, the CCPs promoted the formation of BrO3(-) and Br-DBPs through catalyzing the HOBr disproportionation pathway and the reaction of HOBr toward HA, respectively. Descriptors Links Book Title Database Publisher Elsevier Ltd Data Source Authors Hu,J., Qiang,Z., Dong,H., Qu,J. Original/Translated Title URL Date of Electronic 20160419 PMCID Editors
Hydroxyl carboxylate based non-phosphorus corrosion inhibition process for reclaimed water pipeline and downstream recirculating cooling water system	2016	Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Beijing Key Laboratory of Industrial Wastewater Treatment and Reuse, Research Center for Eco-Envir	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Journal of Environmental Sciences (China) Periodical, Abbrev. J.Environ.Sci.(China) Pub Date Free Form Jan Volume 39 Issue Start Page 13 Other Pages 21 Notes CI: Copyright (c) 2015; JID: 100967627; OTO: NOTNLM; 2015/07/23 [received]; 2015/10/06 [revised]; 2015/10/07 [accepted]; 2015/12/08 [aheadofprint]; ppublish Place of Publication Netherlands ISSN/ISBN 1001-0742; 1001-0742 Accession Number PMID: 26899639 Language eng SubFile Journal Article; Research Support, Non-U.S. Gov't; IM DOI 10.1016/j.jes.2015.10.007 [doi] Output Language Unknown(0) PMID 26899639 Abstract A combined process was developed to inhibit the corrosion both in the pipeline of reclaimed water supplies (PRWS) and in downstream recirculating cooling water systems (RCWS) using the reclaimed water as makeup. Hydroxyl carboxylate-based corrosion inhibitors (e.g., gluconate, citrate, tartrate) and zinc sulfate heptahydrate, which provided Zn(2+) as a synergistic corrosion inhibition additive, were added prior to the PRWS when the phosphate (which could be utilized as a corrosion inhibitor) content in the reclaimed water was below 1.7 mg/L, and no additional corrosion inhibitors were required for the downstream RCWS. Satisfactory corrosion inhibition was achieved even if the RCWS was operated under the condition of high numbers of concentration cycles. The corrosion inhibition requirement was also met by the appropriate combination of PO4(3-) and Zn(2+) when the phosphate content in the reclaimed water was more than 1.7 mg/L. The process integrated not only water reclamation and reuse, and the operation of a highly concentrated RCWS, but also the comprehensive utilization of phosphate in reclaimed water and the application of non-phosphorus corrosion inhibitors. The proposed process reduced the operating cost of the PRWS and the RCWS, and lowered the environmental hazard caused by the excessive discharge of phosphate. Furthermore, larger amounts of water resources could be conserved as a result. Descriptors Links Book Title Database Publisher . Published by Elsevier B.V Data Source Authors Wang,J., Wang,D., Hou,D. Original/Translated Title URL Date of Electronic 20151208 PMCID Editors
Does KMnO4 preoxidation reduce the genotoxicity of disinfection by-products?	2016	Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China.; Key Laboratory of Drinking Wa	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Chemosphere Periodical, Abbrev. Chemosphere Pub Date Free Form 10-Aug Volume 163 Issue Start Page 73 Other Pages 80 Notes LR: 20160813; CI: Copyright (c) 2016; JID: 0320657; OTO: NOTNLM; 2016/06/07 [received]; 2016/08/01 [revised]; 2016/08/02 [accepted]; aheadofprint Place of Publication ISSN/ISBN 1879-1298; 0045-6535 Accession Number PMID: 27521641 Language ENG SubFile JOURNAL ARTICLE DOI S0045-6535(16)31035-9 [pii] Output Language Unknown(0) PMID 27521641 Abstract Potassium permanganate (KMnO4) preoxidation is capable of affecting the formation of disinfection by-products (DBPs). However, few studies have focused on the toxicity of DBPs after KMnO4 preoxidation, which is an important index to evaluate alternative treatment processes. Herein genotoxicity (SOS/umu test) was used to clarify the impact of KMnO4 preoxidation on the chlorination byproducts produced from two representative precursors, tyrosine (Tyr) and 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid (BP-4), and their mixture. Results revealed that although KMnO4 could not oxidize BP-4, after chlorination KMnO4 could oxidize the chlorination byproducts of BP-4 and thus decrease the genotoxicity production. For Tyr, KMnO4 preoxidation could increase or decrease the genotoxicity of DBPs, depending on the KMnO4 dose. The optimal initial molar ratio of KMnO4 to Tyr was confirmed to be 1:1. It has been proved that both the oxidation of Tyr by KMnO4 and manganese dioxide (MnO2, the reduction product of KMnO4) and the oxidation of chlorination byproducts by MnO2 can decrease the genotoxicity production of chlorinated Tyr. Remarkably, during chlorination, the competition of manganese(II) oxidation with organic oxidation can result in less chlorine reacting with organics, to induce an increase in genotoxicity. This is the main cause for the increase in genotoxicity of chlorinated Tyr after KMnO4 preoxidation. Additionally, the genotoxicity of the chlorinated mixture was shifted from being higher than the sum of individual genotoxicities of the chlorinated precursors to being lower than their sum with increasing KMnO4 dosage, due to the combined effects between the preoxidation-chlorination products from the two compounds. Descriptors Links Book Title Database Publisher Elsevier Ltd Data Source Authors Chang,Y., Bai,Y., Qu,J. Original/Translated Title URL Date of Electronic 20160810 PMCID Editors
Determination of ten monohydroxylated polycyclic aromatic hydrocarbons by liquid-liquid extraction and liquid chromatography/tandem mass spectrometry	2012	Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, School of Life Science, South China Normal University, Guangzhou 510631, China.	Read more...
Source Type Print(0) Ref Type Journal Article Periodical, Full Talanta Periodical, Abbrev. Talanta Pub Date Free Form 15-May Volume 93 Issue Start Page 383 Other Pages 391 Notes CI: Published by Elsevier B.V.; GR: 1U38DD000481-01/DD/NCBDD CDC HHS/United States; JID: 2984816R; 0 (Polycyclic Hydrocarbons, Aromatic); 2012/01/27 [received]; 2012/02/17 [revised]; 2012/02/22 [accepted]; 2012/03/01 [aheadofprint]; ppublish Place of Publication Netherlands ISSN/ISBN 1873-3573; 0039-9140 Accession Number PMID: 22483926 Language eng SubFile Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't; IM DOI 10.1016/j.talanta.2012.02.059 [doi] Output Language Unknown(0) PMID 22483926 Abstract The aim of this study is to develop and validate an analytical method for the quantitation of ten urinary monohydroxylated polycyclic aromatic hydrocarbons (OH-PAHs) through high pressure liquid chromatography/tandem mass spectrometry (HPLC/MS/MS). After enzymatic deconjugation, urine samples were extracted by liquid-liquid extraction (LLE) and OH-PAHs were analyzed by HPLC/MS/MS operated in negative electrospray ionization (ESI) and multiple reaction monitoring (MRM) mode. LLE was conducted with the solvent mixture of pentane and toluene, which reduced the matrix interferences and enhanced the method sensitivity significantly. Deuterated and (13)C-labeled analogs are used as internal standards. Calibration curves of all target analytes shows favorable linearity within the concentration range of 5.9-15,000.0 ng/L for different OH-PAHs with the regression coefficients above 0.993. The limits of detection (LODs) in pooled urine ranged from 1.72 to 17.47 ng/L, which were much lower than those obtained by a gas chromatography/high resolution mass spectrometry (GC/HRMS) method. The method shows satisfactory accuracy and precision when analyzing three different levels of OH-PAHs spiked in pooled urine. Except for 1-hydroxynaphthalene, recoveries of other OH-PAHs were in the range of 100 +/- 20% with a variation coefficient of less than 13%. The measurement of OH-PAHs from a QC sample of the Centers for Disease Control and Prevention (CDC) generated results close to the values measured by CDC. This method has been successfully employed in the California Biomonitoring Program. Descriptors Links Book Title Database Publisher Data Source Authors Fan,R., Ramage,R., Wang,D., Zhou,J., She,J. Original/Translated Title URL Date of Electronic 20120301 PMCID Editors
Determination of 16 polycyclic aromatic hydrocarbons in environmental water samples by solid-phase extraction using multi-walled carbon nanotubes as adsorbent coupled with gas chromatography-mass spectrometry	2010	Key Laboratory of Environmental Engineering of Shandong Province, Institute of Environment & Municipal Engineering, Qingdao Technological University, Qingdao 266033, China. majiping2001@yahoo.com.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 20-Aug Volume 1217 Issue 34 Start Page 5462 Other Pages 5469 Notes LR: 20131121; CI: Copyright 2010; JID: 9318488; 0 (Hexanes); 0 (Nanotubes, Carbon); 0 (Polycyclic Hydrocarbons, Aromatic); 0 (Water Pollutants, Chemical); 059QF0KO0R (Water); 2DDG612ED8 (n-hexane); 2010/02/11 [received]; 2010/06/16 [revised]; 2010/06/23 [ Place of Publication Netherlands ISSN/ISBN 1873-3778; 0021-9673 Accession Number PMID: 20630533 Language eng SubFile Journal Article; Research Support, Non-U.S. Gov't; IM DOI 10.1016/j.chroma.2010.06.060 [doi] Output Language Unknown(0) PMID 20630533 Abstract A solid-phase extraction (SPE) using multi-walled carbon nanotubes (MWCNTs) as adsorbent coupled with gas chromatography-mass spectrometry (GC-MS) method was developed for the determination of 16 polycyclic aromatic hydrocarbons (PAHs) in environmental water samples. Several condition parameters, such as extraction adsorbents, elution solvents and volumes, and sample loading flow rate and volume were optimized to obtain high SPE recoveries and extraction efficiency. 150mg MWCNTs as sorbent presented high extraction efficiency of 16 PAHs due to the large specific surface area and high adsorption capacity of MWCNTs compared with the commercial C18 column (250mg/2mL). The calibration curves of 16 PAHs extracted were linear in the range of 20-5000ngL(-1), with the correlation coefficients (r(2)) between 0.9848 and 0.9991. The method attained good precisions (relative standard deviation, RSD) from 1.2% to 12.1% for standard PAHs aqueous solutions; method recoveries ranged in 76.0-125.5%, 74.5-127.0%, and 70.0-122.0% for real spiked samples from river water, tap water and seawater, respectively. Limits of detection (LODs, S/N=3) of the method were determined from 2.0 to 8.5ngL(-1). The optimized method was successfully applied to the determination of 16 PAHs in real environmental water samples. Descriptors Adsorption, Fresh Water/chemistry, Gas Chromatography-Mass Spectrometry/methods, Hexanes/chemistry, Linear Models, Nanotubes, Carbon/chemistry, Polycyclic Hydrocarbons, Aromatic/analysis, Reproducibility of Results, Seawater/chemistry, Sensitivity and Specificity, Solid Phase Extraction/methods, Water/chemistry, Water Pollutants, Chemical/analysis Links Book Title Database Publisher Elsevier B.V Data Source Authors Ma,J., Xiao,R., Li,J., Yu,J., Zhang,Y., Chen,L. Original/Translated Title URL Date of Electronic 20100626 PMCID Editors

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