51
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Guo Y, Kannan K. Analytical Methods for the Measurement of Legacy and Emerging Persistent Organic Pollutants in Complex Sample Matrices. PERSISTENT ORGANIC POLLUTANTS (POPS): ANALYTICAL TECHNIQUES, ENVIRONMENTAL FATE AND BIOLOGICAL EFFECTS 2015. [DOI: 10.1016/b978-0-444-63299-9.00001-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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52
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Emerging Contaminants. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/b978-0-444-63340-8.00010-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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53
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Kaur B, Srivastava R, Satpati B. Silver nanoparticle decorated polyaniline–zeolite nanocomposite material based non-enzymatic electrochemical sensor for nanomolar detection of lindane. RSC Adv 2015. [DOI: 10.1039/c5ra09461e] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this study, a silver nanoparticle decorated polyaniline-nanocrystalline zeolite organic–inorganic hybrid material was synthesized for the electrochemical detection of lindane.
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Affiliation(s)
- Balwinder Kaur
- Department of Chemistry
- Indian Institute of Technology Ropar
- Rupnagar-140001
- India
| | - Rajendra Srivastava
- Department of Chemistry
- Indian Institute of Technology Ropar
- Rupnagar-140001
- India
| | - Biswarup Satpati
- Surface Physics and Material Science Division
- Saha Institute of Nuclear Physics
- Kolkata 700 064
- India
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54
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Cholewa R, Beutling D, Budzyk J, Pietrzak M, Walorczyk S. Persistent organochlorine pesticides in internal organs of coypu, Myocastor coypus. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2015; 50:590-594. [PMID: 26065519 DOI: 10.1080/03601234.2015.1028844] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A highly selective and sensitive method based on gas chromatography-tandem mass spectrometry (GC-MS/MS) to identify and quantify persistent organochlorine pesticides, (18 compounds including primary compounds and metabolites), in animal internal organs (kidneys, liver, and brain) has been developed. Tandem mass spectrometric conditions were individually optimized for each target compound in Multiple Reaction Monitoring (MRM) mode to obtain maximum sensitivity. Prior to instrumental analysis, a sample preparation method based on matrix solid phase dispersion (MSPD) followed by acidic digestion with sulfuric acid to reduce matrix co-extractives was employed. Analyses of real samples were carried out on coypus (Myocastor coypus) from the autumn slaughter of 19 animals. In the analyzed samples, three of the target compounds, namely DDE-pp' (DDT metabolite), HCB and lindane, were detected. Their concentration levels fell in the ranges of 0.003-0.007, 0.003-0.025, and 0.003-0.021 mg kg(-1) (0.005, 0.010, and 0.010 mg kg(-1) on average) in the case of DDE-pp', HCB and lindane, respectively. Although low quantities of organochlorine pesticides do not pose an immediate danger to consumers' health, they should be of public health concern considering long-term, low-dose exposure.
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Affiliation(s)
- Ryszard Cholewa
- a Department of Small Mammals Breeding and Animal Origin Materials, Faculty of Animal Breeding and Biology, Poznań University of Life Sciences , Poznań , Poland
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55
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Amendola G, Pelosi P, Attard Barbini D. Determination of pesticide residues in animal origin baby foods by gas chromatography coupled with triple quadrupole mass spectrometry. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2015; 50:109-120. [PMID: 25587780 DOI: 10.1080/03601234.2015.975607] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A simple, fast and multiresidue method for the determination of pesticide residues in baby foods of animal origin has been developed in order to check the compliance with the Maximum Residue Levels (MRLs) set at a general value of 0.01 mg/kg by Commission Directive 2006/125/EC for infant foods. The main classes of organochlorine, organophosphorus and pyrethroid compounds have been considered, which are mainly fat soluble pesticides. The analytical procedure consists in the extraction of baby food samples by acetonitrile (ACN) followed by a clean up using C18 solid-phase extraction column eluted with ACN. The compounds were determined by gas chromatography-triple quadrupole mass spectrometry equipped with a Programmed Temperature Vaporizer (PTV) injection and a backflush system. In order to compensate for matrix effects PTV and matrix matched standard calibrations have been used. The method has been fully validated for 57 pesticides according to the Document SANCO/12571/2013. Accuracy and precision (repeatability) have been studied by recoveries at two spiking levels, the Limit of Quantitation (LOQ) (0.003-0.008 mg/kg) and 10 time greater (0.03-0.08 mg/kg), and the results were in the acceptable range of 70-120% with Relative Standards Deviations (RSD) ≤20%. Selectivity, linearity, LOQ and uncertainty of measurement were also determined for all the compounds. The method has been also applied for the analysis of 18 baby food animal origin samples, bought form the local market in Rome (Italy), and no pesticide in the scope of the method has been found above the MRL or the LOQ.
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Affiliation(s)
- Graziella Amendola
- a National Institute of Health , Department of Environment and Primary Prevention , Rome , Italy
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56
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Determination of carbaryl pesticide in Fuji apples using surface-enhanced Raman spectroscopy coupled with multivariate analysis. Lebensm Wiss Technol 2015. [DOI: 10.1016/j.lwt.2014.08.011] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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57
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He D, Xia B, Liu J, Ding L, Zhou Y. Determination of Kepone and Its Metabolite in Water and Soil by High-Performance Liquid Chromatography–Mass Spectrometry. ANAL LETT 2014. [DOI: 10.1080/00032719.2014.930867] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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58
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Wang Y, Fan Z. Dispersive Liquid–Liquid Microextraction Combined with Micellar Electrokinetic Chromatography for the Determination of Pesticide in Apple Sample. J DISPER SCI TECHNOL 2014. [DOI: 10.1080/01932691.2013.859623] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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59
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Synaridou MES, Sakkas VA, Stalikas CD, Albanis TA. Evaluation of magnetic nanoparticles to serve as solid-phase extraction sorbents for the determination of endocrine disruptors in milk samples by gas chromatography mass spectrometry. J Chromatogr A 2014; 1348:71-9. [PMID: 24837417 DOI: 10.1016/j.chroma.2014.04.092] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Revised: 04/10/2014] [Accepted: 04/26/2014] [Indexed: 11/18/2022]
Abstract
A rapid magnetic solid-phase extraction (MSPE) is proposed based on C18-functionalized magnetic silica nanoparticles as sorbents, for the determination of endocrine disruptors - 20 organochlorine pesticides and 6 polychlorinated biphenyls - in milk samples. Magnetic nanoparticles are characterized by several techniques, such as Scanning Electron Microscopy, X-Ray diffraction, Brunauer-Emmett-Teller and Fourier transform-infrared. The MSPE is performed by dispersion of the Fe3O4@SiO2@C18 nanoparticles in milk samples with sonication, after protein precipitation. Then, the sorbent is collected by applying an external magnetic field and the analytes are desorbed by n-hexane. Several parameters affecting the extraction efficiency of target analytes by the magnetic nanoparticles are investigated, including washing and elution solvents, amount of sorbents, time of extraction and elution, sample and elution solvent volume. The proposed method is optimized by means of experimental design and response surface methodology. When coupled with gas chromatography-mass spectrometry detection and under optimum extraction conditions, average recoveries of target analytes are found to be in the range of 79% to 116%. The proposed MSPE-GC-MS analytical method has a linear calibration curve for all target analytes with coefficients of determination to range from 0.9950 to 0.9999. The limits of quantification are found to be between 0.2 and 1μg/L ensuring compliance with the maximum residue limits established by European Commission and Codex Alimentarius, for OCPs and PCBs residues in milk. The proposed method is applied to the determination of target analytes in milk samples from local markets.
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Affiliation(s)
- Maria-Evangelia S Synaridou
- Laboratory of Analytical Chemistry, Department of Chemistry, University of Ioannina, Ioannina 45110, Greece.
| | - Vasilios A Sakkas
- Laboratory of Analytical Chemistry, Department of Chemistry, University of Ioannina, Ioannina 45110, Greece.
| | - Constantine D Stalikas
- Laboratory of Analytical Chemistry, Department of Chemistry, University of Ioannina, Ioannina 45110, Greece.
| | - Triantafyllos A Albanis
- Laboratory of Analytical Chemistry, Department of Chemistry, University of Ioannina, Ioannina 45110, Greece.
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60
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Witczak A, Abdel-Gawad H. Assessment of health risk from organochlorine pesticides residues in high-fat spreadable foods produced in Poland. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2014; 49:917-28. [PMID: 25310807 DOI: 10.1080/03601234.2014.951574] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Currently, butter and margarine are food products attracting wide customer interest. Every day, consumers around the world buy these products for human consumption. Butter is obtained from milk fat, while margarine is derived from vegetable oils. The content of organochlorine pesticide (OCP) residues was examined in both types of these high fatty products. A gas chromatograph with MSD (HP 5973) detector was used for the determination of pesticides such as α-HCH, β-HCH, γ-HCH, DDT, DDD, DDE, aldrin, dieldrin, endrin, heptachlor and heptachlor epoxide. The examined products had diverse concentrations of the analyzed compounds. Visible was the division based on the origin of the product, which might be composed of animal or vegetable fats. The research has revealed the presence of OCP residues in all examined spreads. Quantities of organochlorine compounds did not pose an immediate danger to the consumers' health. Human and environmental health risk assessment was carried out by the estimation of lifetime average daily dose (LADD) and non-carcinogenic health hazard quotient (HQ). Total estimated LADD ranged between 1.3 × 10(-5) and 3.1 × 10(-5) mg kg(-1) d(-1) for butter, and 1.9 × 10(-6) and 4.6 × 10(-6) mg kg(-1) d(-1) for margarine and mix spread. The HQ ranged between 1.1 × 10(-4) and 3.7 × 10(-4) for butter, and 1.4 × 10(-5) and 9.0 × 10(-6) for margarine and mix spread for adults. These estimated HQs were within the safe acceptable limits, indicating a negligible risk to the residents of the study area.
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Affiliation(s)
- Agata Witczak
- a Department of Toxicology , West Pomeranian University of Technology , Szczecin , Poland
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61
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Deme P, Azmeera T, Prabhavathi Devi B, Jonnalagadda PR, Prasad R, Vijaya Sarathi U. An improved dispersive solid-phase extraction clean-up method for the gas chromatography–negative chemical ionisation tandem mass spectrometric determination of multiclass pesticide residues in edible oils. Food Chem 2014; 142:144-51. [DOI: 10.1016/j.foodchem.2013.07.044] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Revised: 06/27/2013] [Accepted: 07/09/2013] [Indexed: 10/26/2022]
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62
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Omar N, Bakar J, Muhammad K. Determination of organochlorine pesticides in shrimp by gas chromatography–mass spectrometry using a modified QuEChERS approach. Food Control 2013. [DOI: 10.1016/j.foodcont.2013.04.029] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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63
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Deme P, Azmeera T, Bethala PDL, Jonnalagadda PR, Rachapudi PB, Upadhyayula VSV. Effect of background derivatization on the signal enhancement of pesticide residues extracted from edible oils. J Sep Sci 2013; 36:3926-33. [DOI: 10.1002/jssc.201300454] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2013] [Revised: 09/25/2013] [Accepted: 10/04/2013] [Indexed: 11/10/2022]
Affiliation(s)
- Pragney Deme
- National Centre for Mass Spectrometry; Indian Institute of Chemical Technology; Tarnaka; Hyderabad Andhra Pradesh India
| | - Tirupathi Azmeera
- Center for Lipid Research; Indian Institute of Chemical Technology; Tarnaka; Hyderabad Andhra Pradesh India
| | | | - Padmaja R. Jonnalagadda
- Food and Drug Toxicology Research Center; National Institute of Nutrition; Tarnaka; Hyderabad Andhra Pradesh India
| | - Prasad B.N. Rachapudi
- Center for Lipid Research; Indian Institute of Chemical Technology; Tarnaka; Hyderabad Andhra Pradesh India
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64
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Rajski Ł, Lozano A, Uclés A, Ferrer C, Fernández-Alba AR. Determination of pesticide residues in high oil vegetal commodities by using various multi-residue methods and clean-ups followed by liquid chromatography tandem mass spectrometry. J Chromatogr A 2013; 1304:109-20. [PMID: 23871559 DOI: 10.1016/j.chroma.2013.06.070] [Citation(s) in RCA: 132] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2013] [Revised: 06/24/2013] [Accepted: 06/26/2013] [Indexed: 11/17/2022]
Abstract
Several extraction methods were evaluated in terms of recoveries and extraction precision for 113 pesticides in avocado: QuEChERS with various d-SPE clean-ups (Z-Sep, Z-Sep+, PSA+C18 and silica), miniLuke and ethyl acetate. Extracts were analysed using liquid chromatography coupled with triple quadrupole mass spectrometer working in multi-reaction monitoring mode. Z-Sep and Z-Sep+ are new types of material for high lipid matrices - these two sorbents contain ZrO2, which improves fat removal from the extracts. The QuEChERS protocol with Z-Sep provided the highest number of pesticides with recoveries in the 70-120% range along with the lowest amount of coextracted matrix compounds. Subsequently, this method was validated in two matrices - avocado and almonds. In the validation recoveries at two levels - 10 and 50μg/kg - limit of quantitation, linearity, matrix effects, as well as the inter- and intraday precision were studied. In the avocado samples, 107 analytes had LOQs equal to 10μg/kg (signal to noise of quantitative transition was equal 20 or more). In the almond samples, 92 pesticides had LOQs equal to 10μg/kg (S/N≥20) and 2 pesticides at 50μg/kg. The validated method was employed in the analysis of real avocado and almond samples.
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Affiliation(s)
- Łukasz Rajski
- Pesticide Residue Research Group, European Union Reference Laboratory (EURL), Department of Hydrogeology and Analytical Chemistry, University of Almería, Ctra. Sacramento S/N°, La Cañada de San Urbano, 04120, Almería, Spain
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65
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Butt SB, Zafar A, Riaz M. Gamma radiolytic eradication of methoxychlor in aqueous media: the degradation pathways using HPLC and SPME-GC-MS. RADIOCHIM ACTA 2013. [DOI: 10.1524/ract.2013.2044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
The gamma radiation-induced degradation of environmental pollutant methoxychlor in water was investigated. A 60Co gamma radiation source with a dose rate of 372 Gy h−1 was used for gamma irradiation of 1 mg L−1 and 10 mg L−1 methoxychlor in water with a varied absorbed dose of 1–5 kGy. A single step clean up and pre-concentration procedure based on solid phase micro-extraction was optimized. The extent of radiolytic degradation was monitored by reversed phase HPLC-UV and GC-ECD. The trace and ultra trace level degradation products were identified using GC-MS-SPME by comparing their mass spectra with the NIST 98 m mass spectral library. Most of the generated products for 4 kGy dose are substituted chlorophenols. The reaction pathways of these substituted chlorophenols and benzophenone formation are also proposed. However, generated chlorophenols disappeared along with methoxychlor for an absorbed dose of 5 kGy. The attained degradation of methoxychlor is ∼ 95% that reflects the potential use of ionization radiation for wastewater treatment.
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Affiliation(s)
| | - Amina Zafar
- Central Analytical Facility Division, PINSTECH, Islamabad, Pakistan
| | - Muhammad Riaz
- Pakistan Institute of Nuclear Science and Technology (PINSTECH), Chemistry Division, Islamabad, Pakistan
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66
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Martins JG, Amaya Chávez A, Waliszewski SM, Colín Cruz A, García Fabila MM. Extraction and clean-up methods for organochlorine pesticides determination in milk. CHEMOSPHERE 2013; 92:233-246. [PMID: 23648324 DOI: 10.1016/j.chemosphere.2013.04.008] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Revised: 03/12/2013] [Accepted: 04/01/2013] [Indexed: 06/02/2023]
Abstract
Organochlorine pesticides (OCPs) can cause environmental damage and human health risks since they are lipophilic compounds with high resistance to degradation and long half-lives in humans. As most persistent OCPs have been banned years ago, it is expected to find these compounds at trace levels in environment. Therefore, increasingly sensitive and reliable analytical techniques are required to ensure effective monitoring of these compounds. The aim of this review is to discuss extraction and clean-up methods used to monitor OCP residues in milk, reported in the last 20 years. To carry out this review, an exhaustive bibliographic review was conducted. Despite the disadvantages of conventional extraction and clean-up methods, such as liquid-liquid, solid-phase or Soxhlet extractions, these procedures are still used due to their reliability. New extraction methods, like solid-phase microextraction, matrix solid-phase dispersion or QuEChERS, have not been thoroughly evaluated for OCP determination in milk. Almost all the methodologies analyzed in this review presented good performance characteristics according to the performance acceptability criteria set in SANCO's procedure. Comparison between limits of quantification (LOQ) and detection (LOD), for the reported methodologies, is not always possible due to the heterogeneity of the units. Thus, researchers should take into account an homogenization of LOD and LOQ units, according to the international regulations and MRLs established. Finally, more research is necessary to obtain the ideal methodology for OCPs determination in milk, which comprises the environmentally friendly characteristics of the new techniques and the reliability of the traditional methodologies.
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Affiliation(s)
- Joana Gomes Martins
- Departamento de Farmacia de la Facultad de Química, Universidad Autónoma del Estado de México, Paseo Tollocan Esq. Paseo Colón, C.P. 50100 Toluca, Estado de México, Mexico
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67
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Saadati N, Abdullah MP, Zakaria Z, Sany SBT, Rezayi M, Hassonizadeh H. Limit of detection and limit of quantification development procedures for organochlorine pesticides analysis in water and sediment matrices. Chem Cent J 2013; 7:63. [PMID: 23561579 PMCID: PMC3630005 DOI: 10.1186/1752-153x-7-63] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2012] [Accepted: 03/19/2013] [Indexed: 12/05/2022] Open
Abstract
Background Reliable values for method validity of organochlorine pesticides determination were investigated, in water by solid phase extraction and in sediment by Soxhlet extraction, followed by gas chromatography equipped with an electron capture detector. Organochlorine pesticides are categorized as Persistent Organic Pollutants. Hence, critical decisions to control exposure to these chemicals in the environment are based on their levels in different media; it is important to find valid qualitative and quantitative results for these components. In analytical chemistry, internal quality procedures are applied to produce valid logical results. Result In this study, 18 organochlorine pesticides were targeted for analysis and determination in water and river sediment. Experiments based on signal-to-noise ratio, calibration curve slope and laboratory fortified blank methods were conducted to determine the limits of qualification and quantification. The data were compared with each other. The limitation values, following Laboratory Fortified Blank, showed significant differences in the signal-to-noise ratio and calibration curve slope methods, which are assumed in the results for the sample concentration factor to be 1,000 times in water and 10 times in sediment matrices. The method detection limit values were found to be between 0.001 and 0.005 μg/L (mean of 0.002 ± 0.001) and 0.001 and 0.005 μg/g (mean of 0.001 ± 0.001). The quantification limits were found to be between 0.002 and 0.016 μg/L (mean of 0.006 ± 0.004) and 0.003 and 0.017 μg/g (mean of 0.005 ± 0.003 μg/L) for water and sediment, respectively, based on the laboratory fortified blank method. Because of different slopes in the calibration methods, it was also found that the limitation values for some components from the internal standard were higher than from external standard calibration, because in the latter a factor for injection efficiency is applied for calibration. Conclusion Technically, there are differentiations between detection limits for quality and quantity from component to component, resulting from noise, response factors of instruments and matrix interference. However, the calculation method is the cause of differentiation for each component of the different methods. The results show that for no matter what component, the relationship between these levels in different methods is approximately: Signal to Noise : Calibration Slope = 1:10. Therefore, due to different methods to determine LOD and LOQ, the values will be different. In the current study, laboratory fortified blank is the best method, with lower limitation values for Soxhlet and solid phase extraction of OCPs from sediment and water, respectively.
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Affiliation(s)
- Naghmeh Saadati
- School of Chemical Sciences and Food Technology, Faculty of Science and Technology, Universiti Kebangsaan of Malaysia, Bangi, Malaysia.
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68
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Support vector regression based QSPR for the prediction of retention time of pesticide residues in gas chromatography–mass spectroscopy. Microchem J 2013. [DOI: 10.1016/j.microc.2012.05.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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69
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Andrade AS, Sacheto D, Hoff RB, Pizzolato TM. Evaluation of lipid removal from animal fats for the determination of organochlorine, pesticides, and polychlorinated biphenyl indicators by gas chromatography with electron capture detector. J Sep Sci 2012; 35:2233-40. [DOI: 10.1002/jssc.201200223] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2012] [Revised: 05/04/2012] [Accepted: 05/10/2012] [Indexed: 11/08/2022]
Affiliation(s)
- Adriana S. Andrade
- Laboratory of Pesticides and Veterinary Residues - Ministry of Agriculture; Livestock and Food Supply of Brazil; Brazil
| | - Doriane Sacheto
- Laboratory of Pesticides and Veterinary Residues - Ministry of Agriculture; Livestock and Food Supply of Brazil; Brazil
| | - Rodrigo B. Hoff
- Laboratory of Pesticides and Veterinary Residues - Ministry of Agriculture; Livestock and Food Supply of Brazil; Brazil
| | - Tania M. Pizzolato
- Institute of Chemistry; Federal University of Rio Grande do Sul (UFRGS); Porto Alegre/RS Brazil
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70
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Optimization of QuEChERS Procedure Coupled to GC-ECD for Organochlorine Pesticide Determination in Carrot Samples. FOOD ANAL METHOD 2012. [DOI: 10.1007/s12161-012-9463-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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71
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Correia-Sá L, Fernandes VC, Carvalho M, Calhau C, Domingues VF, Delerue-Matos C. Optimization of QuEChERS method for the analysis of organochlorine pesticides in soils with diverse organic matter. J Sep Sci 2012; 35:1521-30. [DOI: 10.1002/jssc.201200087] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Luísa Correia-Sá
- REQUIMTE; Instituto Superior de Engenharia do Porto; Porto Portugal
- FCNAUP; Porto Portugal
| | - Virgínia C. Fernandes
- REQUIMTE; Instituto Superior de Engenharia do Porto; Porto Portugal
- CIQ (Investigation Centre); Porto Portugal
| | - Manuela Carvalho
- REQUIMTE; Instituto Superior de Engenharia do Porto; Porto Portugal
| | - Conceição Calhau
- Department of Biochemistry (U38-FCT); Faculty of Medicine; University of Porto, Porto Portugal
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Dehghani Mohammad Abadi M, Ashraf N, Chamsaz M, Shemirani F. An overview of liquid phase microextraction approaches combined with UV-Vis spectrophotometry. Talanta 2012; 99:1-12. [PMID: 22967514 DOI: 10.1016/j.talanta.2012.05.027] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2012] [Revised: 05/15/2012] [Accepted: 05/16/2012] [Indexed: 11/15/2022]
Abstract
Ultraviolet and visible spectrophotometer has become a popular analytical instrument in the modern day laboratories. However, the low concentrations of many analytes in samples make it difficult to directly measure them by UV-Vis spectrophotometry. This overview focuses on the combinations of microvolume UV-Vis spectrophotometry with miniaturized approaches to sample preparation, namely, single drop microextraction (SDME), dispersive liquid-liquid microextraction (DLLME), cold induced aggregation microextraction (CIAME), in situ solvent formation microextraction (ISSFME), ultrasound assisted emulsification microextraction (USAEME), solidified floating organic drop microextraction (SFODME), and hollow fiber based liquid phase microextraction (HF-LPME) to improve both the selectivity and sensitivity. Integration of these techniques provides unique advantages which include availability, simplicity of operation, low cost, speed, precision and accuracy; hence making them a powerful tool in chemical analysis.
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73
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Pesticide residue analysis in cereal-based baby foods using multi-walled carbon nanotubes dispersive solid-phase extraction. Anal Bioanal Chem 2012; 404:183-96. [DOI: 10.1007/s00216-012-6103-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2012] [Revised: 04/25/2012] [Accepted: 05/04/2012] [Indexed: 10/28/2022]
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