1
|
Adeeyo AO, Oyetade JA, Alabi MA, Adeeyo RO, Samie A, Makungo R. Tuning water chemistry for the recovery of greener products: pragmatic and sustainable approaches. RSC Adv 2023; 13:6808-6826. [PMID: 36865581 PMCID: PMC9972008 DOI: 10.1039/d2ra06596g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Accepted: 02/17/2023] [Indexed: 03/04/2023] Open
Abstract
The environmental impact and denaturing propensity of organic solvents in the extraction of plant bioactives pose great challenges in extraction systems. As a result, proactive consideration of procedures and evidence for tuning water properties for better recovery and positive influence on the green synthesis of products become pivotal. The conventional maceration approach takes a longer duration (1-72 h) for product recovery while percolation, distillation, and Soxhlet extractions take about 1 to 6 h. An intensified modern hydro-extraction process was identified for tuning water properties with an appreciable yield similar to organic solvents within 10-15 min. The percentage yield of tuned hydro-solvents achieved close to 90% recovery of active metabolites. The additional advantage of using tuned water over organic solvents is in the preservation of the bio-activities and forestalling the possibility of contamination of the bio-matrices during extractions with an organic solvent. This advantage is based on the fast extraction rate and selectivity of the tuned solvent when compared to the traditional approach. This review uniquely approaches the study of biometabolite recovery through insights from the chemistry of water under different extraction techniques for the very first time. Current challenges and prospects from the study are further presented.
Collapse
Affiliation(s)
- A. O. Adeeyo
- Ecology and Resource Management Unit, Faculty of Science, Engineering and Agriculture, University of VendaThohoyandou 0950South Africa,Aqua Plantae Research Group, University of VendaThohoyandou 0950South Africa
| | - J. A. Oyetade
- Material Science and Engineering, School of Materials, Water, Energy and Environmental Science, Nelson Mandela African Institution of Science and TechnologyArushaTanzania
| | - M. A. Alabi
- Department of Microbiology, School of Life Sciences, Federal University of TechnologyAkureNigeria
| | - R. O. Adeeyo
- Ecology and Resource Management Unit, Faculty of Science, Engineering and Agriculture, University of VendaThohoyandou 0950South Africa
| | - A. Samie
- Department of Microbiology, Faculty of Science, Engineering and Agriculture, University of VendaThohoyandou 0950South Africa
| | - R. Makungo
- Department of Earth Science, University of VendaThohoyandou 0950South Africa
| |
Collapse
|
2
|
Ye L, Su G. Elevated concentration and high Diversity of organophosphate esters (OPEs) were Discovered in Sediment from Industrial, and E-Waste Recycling Areas. WATER RESEARCH 2022; 217:118362. [PMID: 35398804 DOI: 10.1016/j.watres.2022.118362] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 03/22/2022] [Accepted: 03/23/2022] [Indexed: 06/14/2023]
Abstract
Aquatic environments in industrial, and e-waste recycling areas might undergo severe contamination; however, there are few studies comprehensively assessing the pollution status of organophosphate esters (OPEs) in these two areas. Here, we applied both atmospheric pressure chemical ionization (APCI) and electron spray ionization (ESI) sources in our target, suspect, and functional group-dependent screening strategy, which enhanced the confidence for confirmation on precursor ions of OPEs. Then, n=53 sediment samples (30 from the industrial area, and 23 from the e-waste recycling area) were analyzed. Twenty-three out of 30 target OPEs were quantifiable in these analyzed samples. Total OPE concentrations (Σ30OPEs) in samples from e-waste recycling area range from 12.8 to 9250 ng/g dry weight (dw), that are statistically significantly greater (t-test, p < 0.001) than those from industrial area (25.1-5520 ng/g dw). Σ30OPEs in the sediments from industrial, or e-waste recycling area are statistically significantly greater (one-way ANOVA, p < 0.001) as compared to those (32.0-369 ng/g dw) from Taihu Lake in our previous study. In sediment from three areas, suspect and non-target analysis fully or tentatively identified other 20 OPEs. Four of them have not been recorded or registered in any of online chemical databases, and they are tentatively named as ((methoxy(phenoxy)phosphoryl)oxy)phenyl diphenyl phosphate (mPPODP), (tert-butyl)phenyl (ethyne-oxidane) bis(2,4-di-tert-butylphenyl) phosphate (TPBDTP), bis(dichlorophenyl) propane-1,3-diyl bis(hexylated phosphate) (BDCBHP), and bis(2-hexadecoxyethyl) ethyl phosphate (BHEPP). Overall, this study provided new insights regarding both analytical methodology and pollution status of OPEs, and highlights that elevated concentrations and high diversity of OPEs exist in sediments from industrial, and e-waste recycling areas.
Collapse
Affiliation(s)
- Langjie Ye
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China
| | - Guanyong Su
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China.
| |
Collapse
|
3
|
Jin Q, Tao D, Lu Y, Sun J, Lam CH, Su G, He Y. New insight on occurrence of liquid crystal monomers: A class of emerging e-waste pollutants in municipal landfill leachate. JOURNAL OF HAZARDOUS MATERIALS 2022; 423:127146. [PMID: 34536849 DOI: 10.1016/j.jhazmat.2021.127146] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 08/23/2021] [Accepted: 09/03/2021] [Indexed: 06/13/2023]
Abstract
Liquid crystal monomers (LCMs) have been proposed as a class of emerging organic pollutants, which were recently detected in indoor dust and sediment samples collected near electronic devices recycling facilities. However, there is a knowledge gap for analytical method, occurrence, and distribution of LCMs in aqueous sample. Herein, a robust method was developed to determine 38 target LCMs in landfill leachate. A combined ultrasonic enhanced liquid-liquid extraction, saponification and silica/florisil packed column purification method achieved recoveries of 76.9~127.1%, 84.5~114.6% and 81.3~104.6% at spiking levels of 2 ng, 10 ng and 50 ng in leachate, respectively. The developed method was validated through determination of target LCMs in leachate samples collected from municipal landfills in Hong Kong (HK) and Shenzhen (SZ), China. There were 23 and 20 LCMs detected in the HK (ΣLCMs=1120 ng/L) and SZ (ΣLCMs=409 ng/L) sample, respectively, with 6 LCMs newly detected in the environment. This study provided the first evidence suggesting that landfill leachate might be a potential sink of LCMs emitted from e-waste. Future study is urged to investigate the potential migration of LCMs from landfill leachate as a point source, and their occurrence, distribution, fate, and ecotoxicological risk in aquatic environments on regional and global scales.
Collapse
Affiliation(s)
- Qianqian Jin
- School of Energy and Environment and State Key Laboratory of Marine Pollution, City University of Hong Kong, Hong Kong, China
| | - Danyang Tao
- Department of Chemistry, City University of Hong Kong, Hong Kong, China
| | - Yichun Lu
- School of Energy and Environment and State Key Laboratory of Marine Pollution, City University of Hong Kong, Hong Kong, China
| | - Jiaji Sun
- School of Energy and Environment and State Key Laboratory of Marine Pollution, City University of Hong Kong, Hong Kong, China
| | - Chun Ho Lam
- School of Energy and Environment and State Key Laboratory of Marine Pollution, City University of Hong Kong, Hong Kong, China
| | - Guanyong Su
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
| | - Yuhe He
- School of Energy and Environment and State Key Laboratory of Marine Pollution, City University of Hong Kong, Hong Kong, China.
| |
Collapse
|
4
|
Su H, Shi S, Zhu M, Li J, Su G. Liquid Crystal Monomers (LCMs) in Sediments: Method Validation and Detection in Sediment Samples from Three Typical Areas. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:2336-2345. [PMID: 33528249 DOI: 10.1021/acs.est.0c06427] [Citation(s) in RCA: 61] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Liquid crystal monomers (LCMs) have been proposed to be persistent, bioaccumulative, and toxic (PBT) substances; however, there is a dearth of information regarding their occurrence in sediment samples. Here, an analytical method was developed for the quantitative determination of LCMs in sediment samples, and n = 76 sediment samples were collected and analyzed to determine accurate concentrations of LCMs. Our results indicated that the developed pretreatment procedure was applicable for the determination of LCM concentrations in sediments. We observed that LCMs were detected in 75 out of the 76 sediment samples, and 23, 18, and 14 out of the 39 target LCMs were quantified in at least one of the analyzed sediments from rivers around LCM or liquid crystal device (LCD) manufacturers, Taihu Lake, and rivers around e-waste recycling sites, respectively. The LCMs in the samples from rivers around LCM/LCD manufacturers exhibited the greatest mean concentrations of 26.1 ng/g dry weight (dw), followed by those from e-waste recycling site areas (1.15 ng/g dw) and Taihu Lake (0.076 ng/g dw). Collectively, this study provided the first analytical method that was able to quantify the concentrations of LCMs in sediment samples and provided the first evidence for the occurrence of LCMs in sediment samples.
Collapse
Affiliation(s)
- Huijun Su
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
| | - Shaobo Shi
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
| | - Ming Zhu
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
| | - Jianhua Li
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
| | - Guanyong Su
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
| |
Collapse
|
5
|
Hanari N, Orihara Y, Matsuyama S. Certified Reference Material for the Quantification of Phthalates in Polyvinyl Chloride Resin (NMIJ CRM 8152). ANAL LETT 2020. [DOI: 10.1080/00032719.2020.1822373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Nobuyasu Hanari
- National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology (NMIJ/AIST), Tsukuba, Ibaraki, Japan
| | - Yukari Orihara
- National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology (NMIJ/AIST), Tsukuba, Ibaraki, Japan
| | - Shigetomo Matsuyama
- National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology (NMIJ/AIST), Tsukuba, Ibaraki, Japan
| |
Collapse
|
6
|
Zhu Y, Narukawa T, Miyashita SI, Kuroiwa T, Inagaki K, Chiba K, Hioki A. Development of a certified reference material (NMIJ CRM 7512-a) for the determination of trace elements in milk powder. ANAL SCI 2013; 29:247-53. [PMID: 23400292 DOI: 10.2116/analsci.29.247] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A certified reference material (CRM), NMIJ CRM 7512-a, was developed for the determination of trace elements in milk powder. At least three independent analytical methods were applied to characterize the certified value of each element; all of these analytical methods were based on microwave acid digestions and carried out using different analytical instruments. The certified value was given on a dry-mass basis, where the dry-mass correction factor was obtained by drying the sample at 65°C for 15 to 25 h. The certified values in the units of mass fractions for 13 elements were as follows: Ca, 8.65 (0.38) g kg(-1); Fe, 0.104 (0.007) g kg(-1); K, 8.41 (0.33) g kg(-1); Mg, 0.819 (0.024) g kg(-1); Na, 1.87 (0.09) g kg(-1); P, 5.62 (0.23) g kg(-1); Ba, 0.449 (0.013) mg kg(-1); Cu, 4.66 (0.23) mg kg(-1); Mn, 0.931 (0.032) mg kg(-1); Mo, 0.223 (0.012) mg kg(-1); Rb, 8.93 (0.31) mg kg(-1); Sr, 5.88 (0.20) mg kg(-1); and Zn, 41.3 (1.4) mg kg(-1), where the numbers in the parentheses are the expanded uncertainties with a coverage factor of 2. The expanded uncertainties were estimated considering the contribution of the analytical methods, the method-to-method variance, the sample homogeneity, the dry-mass correction factor, and the concentrations of the standard solutions for calibration. The concentrations of As (2.1 μg kg(-1)), Cd (0.2 μg kg(-1)), Cr (1.3 μg kg(-1)), Pb (0.3 μg kg(-1)), and Y (64 μg kg(-1)) were given as information values for the present CRM.
Collapse
Affiliation(s)
- Yanbei Zhu
- National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan.
| | | | | | | | | | | | | |
Collapse
|
7
|
Al-Rashdan A, Helaleh MIH. Development of Different Strategies for the Clean-Up of Polychlorinated Biphenyls (PCBs) Congeners Using Pressurized Liquid Extraction. ACTA ACUST UNITED AC 2013. [DOI: 10.4236/jep.2013.41011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
8
|
Helaleh MI, Al-Rashdan A, Ibtisam A. Simultaneous analysis of organochlorinated pesticides (OCPs) and polychlorinated biphenyls (PCBs) from marine samples using automated pressurized liquid extraction (PLE) and Power Prep™ clean-up. Talanta 2012; 94:44-9. [DOI: 10.1016/j.talanta.2012.02.031] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2011] [Revised: 02/07/2012] [Accepted: 02/15/2012] [Indexed: 11/29/2022]
|
9
|
Certified reference material for quantification of polycyclic aromatic hydrocarbons and toxic elements in tunnel dust (NMIJ CRM 7308-a) from the National Metrology Institute of Japan. Anal Bioanal Chem 2011; 401:2909-18. [DOI: 10.1007/s00216-011-5399-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2011] [Revised: 08/30/2011] [Accepted: 09/06/2011] [Indexed: 10/17/2022]
|
10
|
Accurate quantification of polycyclic aromatic hydrocarbons in dust samples using microwave-assisted solvent extraction combined with isotope-dilution mass spectrometry. Anal Chim Acta 2011; 699:49-56. [DOI: 10.1016/j.aca.2011.04.059] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2011] [Revised: 04/23/2011] [Accepted: 04/28/2011] [Indexed: 11/18/2022]
|
11
|
Martínez Vidal JL, Garrido Frenich A, de las Nieves Barco Bonilla M, Romero-González R, Padilla Sánchez JA. Simultaneous extraction of polycyclic aromatic hydrocarbons and polychlorinated biphenyls in agricultural soils by pressurized liquid extraction and determination by gas chromatography coupled to tandem mass spectrometry. Anal Bioanal Chem 2009; 395:1551-62. [DOI: 10.1007/s00216-009-3111-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2009] [Revised: 08/26/2009] [Accepted: 08/27/2009] [Indexed: 10/20/2022]
|
12
|
Certified reference material for quantification of polycyclic aromatic hydrocarbons in sediment from the National Metrology Institute of Japan. Anal Bioanal Chem 2009; 393:2039-49. [DOI: 10.1007/s00216-009-2675-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2008] [Revised: 02/02/2009] [Accepted: 02/03/2009] [Indexed: 10/21/2022]
|
13
|
Miyawaki T, Makino T, Honda K. Rapid Extraction of Dioxins in Soils and Sediments by Microwave-Assisted Extraction (2). BUNSEKI KAGAKU 2009. [DOI: 10.2116/bunsekikagaku.58.21] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Takashi Miyawaki
- Environmental Science for Industry, Faculty of Agriculture, Ehime University
- Present address, Fukuoka Institute of Health and Environmental Sciences
| | - Takanori Makino
- Environmental Science for Industry, Faculty of Agriculture, Ehime University
| | - Katsuhisa Honda
- Environmental Science for Industry, Faculty of Agriculture, Ehime University
| |
Collapse
|
14
|
Kania-Korwel I, Zhao H, Norstrom K, Li X, Hornbuckle KC, Lehmler HJ. Simultaneous extraction and clean-up of polychlorinated biphenyls and their metabolites from small tissue samples using pressurized liquid extraction. J Chromatogr A 2008; 1214:37-46. [PMID: 19019378 PMCID: PMC2648864 DOI: 10.1016/j.chroma.2008.10.089] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2008] [Revised: 10/21/2008] [Accepted: 10/24/2008] [Indexed: 11/28/2022]
Abstract
A pressurized liquid extraction-based method for the simultaneous extraction and in situ clean-up of polychlorinated biphenyls (PCBs), hydroxylated (OH)-PCBs and methylsulfonyl (MeSO(2))-PCBs from small (<0.5 g) tissue samples was developed and validated. Extraction of a laboratory reference material with hexane-dichloromethane-methanol (48:43:9, v/v) and Florisil as fat retainer allowed an efficient recovery of PCBs (78-112%; RSD: 13-37%), OH-PCBs (46+/-2%; RSD: 4%) and MeSO(2)-PCBs (89+/-21%; RSD: 24%). Comparable results were obtained with an established analysis method for PCBs, OH-PCBs and MeSO(2)-PCBs.
Collapse
Affiliation(s)
- Izabela Kania-Korwel
- Department of Occupational and Environmental Health, Collage of Public Health, University of Iowa, Iowa City, IA 52242, USA
| | - Hongxia Zhao
- Department of Occupational and Environmental Health, Collage of Public Health, University of Iowa, Iowa City, IA 52242, USA
- Key Laboratory of Industrial Ecology and Environmental Engineering, MOE, Dalian University of Technology, Dalian 116024, China
| | - Karin Norstrom
- Department of Civil and Environmental Engineering, University of Iowa, Iowa City, IA 52242, USA
| | - Xueshu Li
- Department of Occupational and Environmental Health, Collage of Public Health, University of Iowa, Iowa City, IA 52242, USA
| | - Keri C. Hornbuckle
- Department of Civil and Environmental Engineering, University of Iowa, Iowa City, IA 52242, USA
| | - Hans-Joachim Lehmler
- Department of Occupational and Environmental Health, Collage of Public Health, University of Iowa, Iowa City, IA 52242, USA
| |
Collapse
|
15
|
Preparation of reference material for organochlorine pesticides in a herbal matrix. Anal Bioanal Chem 2008; 392:1507-13. [PMID: 18821071 DOI: 10.1007/s00216-008-2396-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2008] [Revised: 09/02/2008] [Accepted: 09/09/2008] [Indexed: 10/21/2022]
Abstract
The development of reference material for four organochlorine pesticides, namely hexachlorobenzene and three isomers of hexachlorocyclohexane (alpha-hexachlorocyclohexane, beta-hexachlorocyclohexane and gamma-hexachlorocyclohexane), in a ginseng root sample is presented. Raw materials (Panax ginseng) were purchased from a local market and confirmed to contain certain levels of incurred organochlorine pesticide residues by a validated gas chromatography-mass selective detection method. A total of more than 300 bottles each containing 25 g of samples were prepared after the materials had been freeze-dried, milled and thoroughly mixed. The homogeneity and stability of samples from randomly selected bottles were verified and the reference values were characterized using a highly precise isotope dilution gas chromatography-mass spectrometry (ID-GCMS) method that was recently developed by our laboratory. The purity of standard organochlorine chemicals was determined against certified reference materials to establish the accuracy of the ID-GCMS analysis. The concentrations (+/- expanded uncertainty) of hexachlorobenzene, alpha-hexachlorocyclohexane, beta-hexachlorocyclohexane and gamma-hexachlorocyclohexane in the reference material were 0.198 +/- 0.015, 0.450 +/- 0.022, 0.213 +/- 0.011 and 0.370 +/- 0.032 mg kg(-1), respectively. A portion (70 bottles) of the samples was also used in a proficiency testing (PT) scheme for assessing the testing capabilities of field laboratories. The consensus mean values of the PT obtained from the 70 participants were on the same order but deviated by -2.7 to -14.1% from those of the assigned reference values. Because of the wide spread of participants' data (relative standard deviation ranging from 44 to 56%), the PT results were not included in the calculation of the assigned values of the reference materials. The materials served as suitable reference materials to ascertain the quality control and validation processes for the determination of organochlorine pesticides in herbal matrices.
Collapse
|
16
|
García-Rodríguez D, Carro-Díaz AM, Lorenzo-Ferreira RA. Supercritical fluid extraction of polyhalogenated pollutants from aquaculture and marine environmental samples: A review. J Sep Sci 2008; 31:1333-45. [DOI: 10.1002/jssc.200700637] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
17
|
Alkaline extraction in combination with microwave-assisted extraction followed by solid-phase extraction treatment for polycyclic aromatic hydrocarbons in a sediment sample. Anal Chim Acta 2008; 615:47-53. [DOI: 10.1016/j.aca.2008.03.039] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2007] [Revised: 02/20/2008] [Accepted: 03/21/2008] [Indexed: 11/21/2022]
|
18
|
van Leeuwen S, de Boer J. Advances in the gas chromatographic determination of persistent organic pollutants in the aquatic environment. J Chromatogr A 2008; 1186:161-82. [DOI: 10.1016/j.chroma.2008.01.044] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2007] [Revised: 01/15/2008] [Accepted: 01/17/2008] [Indexed: 11/26/2022]
|
19
|
Itoh N, Numata M, Aoyagi Y, Yarita T. Comparison of low-level polycyclic aromatic hydrocarbons in sediment revealed by Soxhlet extraction, microwave-assisted extraction, and pressurized liquid extraction. Anal Chim Acta 2008; 612:44-52. [DOI: 10.1016/j.aca.2008.02.012] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2007] [Revised: 02/01/2008] [Accepted: 02/06/2008] [Indexed: 10/22/2022]
|