A Simple Colorimetric Probe Based on Anti-Aggregation of Aunps for Rapid and Sensitive Detection of Malathion in Environmental Samples
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
"U/^ ((*.U \ BIBLIOTHEEK STARINGGEBOUW Volatilization of Tri-Allate, Ethoprophos and Parathion Measured with Four Methods After Spraying on a Sandy Soil
"u/^ ((*.u \ BIBLIOTHEEK STARINGGEBOUW Volatilization of tri-allate, ethoprophos and parathion measured with four methods after spraying on a sandy soil G. Bor F. van den Berg J.H. Smelt R.A. Smidt A.E. van de Peppel-Groen M. Leistra Report 104 DLO Winand Staring Centre, Wageningen (The Netherlands), 1995 1 h FEB. 1998 0000' ABSTRACT Bor, G., F. van den Berg, J.H. Smelt, R.A. Smidt, A.E. van de Peppel-Groen, M. Leistra, 1995. Volatilization of tri-allate, ethoprophos and parathion measured withfour methods after spraying on a sandy soil. Wageningen (The Netherlands), DLO Winand Staring Centre. Report 104. 62 pp.; 9 Figs; 6 Tables; 14 Refs; 3 Annex. At about eleven times after application of tri-allate, ethoprophos and parathion to a sandy soil, their rates of volatilization were determined with the aerodynamic method (AD),th e Bowen-ratio method (BR), the theoretical-profile method (TP) and the Box method (B). The volatilization was highest for tri-allate and lowest for parathion. On the first day after application, the volatilization rate decreased sharply,bu tthereafte r the decreasewa smor egradual .Th edifference s involatilizatio n rate asdetermine d withth eAD ,B R andT Pmethod s werecomparativel y small.Th erate sdetermine d with the Box method were mostly lower than those determined with the other methods. Keywords: aerodynamic method, air quality, air sampling, Bowen ratio method, Box method, field experiment, gas chromatography, pesticide, polystyrene, theoretical-profile method, XAD ISSN 0927-4537 ©1995 DLO Winand Staring Centre for Integrated Land, Soil and Water Research (SC-DLO) P.O. -
Release of Melamine and Formaldehyde from Melamine-Formaldehyde Plastic Kitchenware
molecules Article Release of Melamine and Formaldehyde from Melamine-Formaldehyde Plastic Kitchenware , Ingo Ebner * y , Steffi Haberer, Stefan Sander, Oliver Kappenstein , Andreas Luch and Torsten Bruhn y Department of Chemical and Product Safety, German Federal Institute for Risk Assessment, Max-Dohrn-Str. 8-10, 10589 Berlin, Germany; [email protected] (S.H.); [email protected] (S.S.); [email protected] (O.K.); [email protected] (A.L.); [email protected] (T.B.) * Correspondence: [email protected]; Tel.: +49-30-18412-27403 These authors contributed equally to this work. y Academic Editor: Roland Franz Received: 26 June 2020; Accepted: 31 July 2020; Published: 10 August 2020 Abstract: The release of melamine and formaldehyde from kitchenware made of melamine resins is still a matter of great concern. To investigate the migration and release behavior of the monomers from melamine-based food contact materials into food simulants and food stuffs, cooking spoons were tested under so-called hot plate conditions at 100 ◦C. Release conditions using the real hot plate conditions with 3% acetic acid were compared with conditions in a conventional migration oven and with a release to deionized water. Furthermore, the kinetics of the release were studied using Arrhenius plots giving an activation energy for the release of melamine of 120 kJ/mol. Finally, a correlation between quality of the resins, specifically the kind of bridges between the monomers, and the release of melamine, was confirmed by CP/MAS 13C-NMR measurements of the melamine kitchenware. Obviously, the ratio of methylene bridges and dimethylene ether bridges connecting the melamine monomers during the curing process can be directly correlated with the amount of the monomers released into food. -
Phytotoxicity of Some Organophosphate Insecticides to Oughly with Air Dry, Sieved Soil, to Pro Duce Rates of 37.5, 75 and ISO Mg Aj
Plant Protection Quarterly VoI.7(1} 1992 23 -------------------------------- ties of each pesticide were shaken thor Phytotoxicity of some organophosphate insecticides to oughly with air dry, sieved soil, to pro duce rates of 37.5, 75 and ISO mg aj. L-' onions and carrots during germination and emergence soil. Each pot constituted one plot. If it is assumed that in a field situation, P.J. Sinclair, New South Wales Agriculture, Horticultural Research and band-in-furrow treatment would treat a Advisory Station, Griffith, New South Wales 2680, Australia. strip 50 mm wide by 20 mm deep, the rates tested would correspond to 37.5, 75 R.J. Neeson and P.A. Williams, New South Wales Agriculture, Agricultural and 150 mg a.i. m" row, or 0.5,1.0 and 2.0 institute, Yanco, New South Wales 2703, Australia. kg a.i. ha" at a row spacing of 75 cm. The low and medium rates are then compara Summary ble to ra tes used in the field by Getzin The phytotoxicity of some commonly phytotoxicity from carbofuran applied to (1973), Thompson et al. (1981) and used insecticides to onions (Allium cepa) onions as a seed dressing. Chlorpyrifos is Goodyer et al. (1989) . and carrots (Daucus carota) during es generally non-phytotoxic at recom Daily counts of emerged seedlings were tablishment was assessed in pot trials. mended rates and methods of application, made at 7 to 18 days and at 21 days after Terbufos, ethoprophos, phoxirn and but some crops are especially sensitive to first watering. These data were used to de carbofuran (all 10% a.L granular fonnu it during the seedling stage or if the termine the total number of seedlings lations) and chlorpyrifos (25% a.i. -
Determination of Organophosphorus Pesticide Residues in Vegetables Using Solid Phase Micro-Extraction Coupled with Gas Chromatography–flame Photometric Detector
Arabian Journal of Chemistry (2015) xxx, xxx–xxx King Saud University Arabian Journal of Chemistry www.ksu.edu.sa www.sciencedirect.com ORIGINAL ARTICLE Determination of organophosphorus pesticide residues in vegetables using solid phase micro-extraction coupled with gas chromatography–flame photometric detector Haizarul Aida Sapahin, Ahmad Makahleh *, Bahruddin Saad * School of Chemical Sciences, Universiti Sains Malaysia, 11800 Minden, Penang, Malaysia Received 17 July 2014; accepted 9 December 2014 KEYWORDS Abstract An adequate and simple analytical method based on solid-phase microextraction Organophosphorus pesticide; (SPME) followed by gas chromatography–flame photometric detection (GC–FPD) for the determi- Direct immersed-solid phase nation of eleven organophosphorus pesticide residues (i.e., ethoprophos, sulfotep, diazinon, tolclo- microextraction; fos-methyl, fenitrothion, chlorpyrifos, isofenphos, methidathion, ethion, triazophos, leptophos) in Gas chromatography–flame vegetables samples (cabbage, kale and mustard) was developed. Important parameters that influ- photometric detector; ence the extraction efficiency (i.e., fibre type, extraction modes, extraction time, salt addition, Vegetables desorption time and temperature) were systematically investigated. Four types of commercially available fibres (i.e., 50/30 lm divinylbenzene/carboxen/polydimethylsiloxane (DVB/CAR/PDMS), 65 lm polydimethylsiloxane/divinylbenzene (PDMS/DVB), 100 lm polydimethylsiloxane (PDMS), and 85 lm polyacrylate (PA)) were evaluated. PA fibre exhibited the best performance and was used for the rest of the studies. The optimised extraction conditions were: extraction time, 30 min at room temperature; stirring speed, 1275 rpm; salt content, 10% NaCl; desorption time and temper- ature, 11 min at 260 °C; and no pH adjustment of the sample extract. The method was validated over the range 0.1–100 lg/L. -
WHO Guidelines for Indoor Air Quality : Selected Pollutants
WHO GUIDELINES FOR INDOOR AIR QUALITY WHO GUIDELINES FOR INDOOR AIR QUALITY: WHO GUIDELINES FOR INDOOR AIR QUALITY: This book presents WHO guidelines for the protection of pub- lic health from risks due to a number of chemicals commonly present in indoor air. The substances considered in this review, i.e. benzene, carbon monoxide, formaldehyde, naphthalene, nitrogen dioxide, polycyclic aromatic hydrocarbons (especially benzo[a]pyrene), radon, trichloroethylene and tetrachloroethyl- ene, have indoor sources, are known in respect of their hazard- ousness to health and are often found indoors in concentrations of health concern. The guidelines are targeted at public health professionals involved in preventing health risks of environmen- SELECTED CHEMICALS SELECTED tal exposures, as well as specialists and authorities involved in the design and use of buildings, indoor materials and products. POLLUTANTS They provide a scientific basis for legally enforceable standards. World Health Organization Regional Offi ce for Europe Scherfi gsvej 8, DK-2100 Copenhagen Ø, Denmark Tel.: +45 39 17 17 17. Fax: +45 39 17 18 18 E-mail: [email protected] Web site: www.euro.who.int WHO guidelines for indoor air quality: selected pollutants The WHO European Centre for Environment and Health, Bonn Office, WHO Regional Office for Europe coordinated the development of these WHO guidelines. Keywords AIR POLLUTION, INDOOR - prevention and control AIR POLLUTANTS - adverse effects ORGANIC CHEMICALS ENVIRONMENTAL EXPOSURE - adverse effects GUIDELINES ISBN 978 92 890 0213 4 Address requests for publications of the WHO Regional Office for Europe to: Publications WHO Regional Office for Europe Scherfigsvej 8 DK-2100 Copenhagen Ø, Denmark Alternatively, complete an online request form for documentation, health information, or for per- mission to quote or translate, on the Regional Office web site (http://www.euro.who.int/pubrequest). -
The List of Extremely Hazardous Substances)
APPENDIX A (THE LIST OF EXTREMELY HAZARDOUS SUBSTANCES) THRESHOLD REPORTABLE INVENTORY RELEASE QUANTITY QUANTITY CAS NUMBER CHEMICAL NAME (POUNDS) (POUNDS) 75-86-5 ACETONE CYANOHYDRIN 500 10 1752-30-3 ACETONE THIOSEMICARBAZIDE 500/500 1,000 107-02-8 ACROLEIN 500 1 79-06-1 ACRYLAMIDE 500/500 5,000 107-13-1 ACRYLONITRILE 500 100 814-68-6 ACRYLYL CHLORIDE 100 100 111-69-3 ADIPONITRILE 500 1,000 116-06-3 ALDICARB 100/500 1 309-00-2 ALDRIN 500/500 1 107-18-6 ALLYL ALCOHOL 500 100 107-11-9 ALLYLAMINE 500 500 20859-73-8 ALUMINUM PHOSPHIDE 500 100 54-62-6 AMINOPTERIN 500/500 500 78-53-5 AMITON 500 500 3734-97-2 AMITON OXALATE 100/500 100 7664-41-7 AMMONIA 500 100 300-62-9 AMPHETAMINE 500 1,000 62-53-3 ANILINE 500 5,000 88-05-1 ANILINE,2,4,6-TRIMETHYL- 500 500 7783-70-2 ANTIMONY PENTAFLUORIDE 500 500 1397-94-0 ANTIMYCIN A 500/500 1,000 86-88-4 ANTU 500/500 100 1303-28-2 ARSENIC PENTOXIDE 100/500 1 THRESHOLD REPORTABLE INVENTORY RELEASE QUANTITY QUANTITY CAS NUMBER CHEMICAL NAME (POUNDS) (POUNDS) 1327-53-3 ARSENOUS OXIDE 100/500 1 7784-34-1 ARSENOUS TRICHLORIDE 500 1 7784-42-1 ARSINE 100 100 2642-71-9 AZINPHOS-ETHYL 100/500 100 86-50-0 AZINPHOS-METHYL 10/500 1 98-87-3 BENZAL CHLORIDE 500 5,000 98-16-8 BENZENAMINE, 3-(TRIFLUOROMETHYL)- 500 500 100-14-1 BENZENE, 1-(CHLOROMETHYL)-4-NITRO- 500/500 500 98-05-5 BENZENEARSONIC ACID 10/500 10 3615-21-2 BENZIMIDAZOLE, 4,5-DICHLORO-2-(TRI- 500/500 500 FLUOROMETHYL)- 98-07-7 BENZOTRICHLORIDE 100 10 100-44-7 BENZYL CHLORIDE 500 100 140-29-4 BENZYL CYANIDE 500 500 15271-41-7 BICYCLO[2.2.1]HEPTANE-2-CARBONITRILE,5- -
Application of Dried Blood Spots for the Determination of Organophosphorus Pesticides by GC-MS/MS
UNIVERSIDADE DA BEIRA INTERIOR Ciências Application of dried blood spots for the determination of organophosphorus pesticides by GC-MS/MS Sofia Pires Seixo Soares Dissertação para obtenção do Grau de Mestre em Bioquímica (2º ciclo de estudos) Orientador: Doutor Mário Jorge Dinis Barroso Co-orientador: Professora Doutora Maria Eugenia Gallardo Alba Covilhã, junho de 2018 Agradecimentos A realização de uma dissertação de mestrado é o culminar de muitas horas de estudo, reflexão e trabalho pessoal, mas representa também uma etapa que não seria possível sem o contributo fundamental de várias pessoas. À Doutora Eugénia Gallardo e ao Doutor Mário Barroso, como excelentes mentores que são, quero agradecer toda a orientação, motivação, incentivo e confiança. Toda a ajuda e partilha de experiência e conhecimento durante todo este percurso. Ao Tiago Rosado, pela imprescindível ajuda e disponibilidade constante, bem como pela amizade. À Joana Gonçalves e ao Ângelo Luís um agradecimento especial pela amizade e carinho demonstrado ao longo deste ano. A todos, quero agradecer pelo bom ambiente proporcionado. Aos meus pais Ana Soares e José Soares, a quem dedico este feito, por me darem a possibilidade de concretizar conquistas como esta, pelo apoio incondicional, por sempre terem acreditado em mim e por fazerem parte deste momento. Aos meus avós e restante família, por todo o apoio e preocupação. Um agradecimento particular à Inês Ramos, à Rita Marques, à Maria Cunha e ao Pedro Batista pelo companheirismo, amizade e apoio de há tantos anos. E por último, mas nunca menos importante, um enorme obrigada ao meu namorado António Fernandes por toda a paciência, pelo incansável apoio, carinho e ajuda. -
Annexure Iii
ANNEXURE III DETAILS OF PRODUCTION AND MANUFACTURING PROCESS 1. RSF Intermediate Manufacturing process: Check and prepare a clean and dry vessel. Remove oxygen from the vessel with nitrogen flushing. Charge the required quantity of Formaldehyde into the clean vessel, followed by Urea and Glyoxal 40% and diethylene glycol. The temperature is increased to 60-80 C under constant stirring. The process is continued for 5-6 hours. Take sample for quality check and if required specifications are not meet, continue reaction further for 1 hour and again check for quality. If specification is reached fill product in containers, to be used for further formulations of finished product. Chemical Reaction Material Balance Input Output Formaldehyde 0.40 RSF Urea 0.20 Reaction Vessel 1.00 Intermediate Glyoxal 0.40 Total 1.00 Total 1.00 Process Flow Diagram M/S. Dystar India Pvt. Ltd., Plot No. 3002/A,GIDC Ankleshwar, Bharuch (GJ) 2. NFF-T Intermediate Manufacturing process: Check and prepare a clean and dry vessel. Remove oxygen from the vessel with nitrogen flushing. Charge the required quantity of glyoxal 40%and water into the clean vessel under constant stirring. Cool the vessel and add N, N-dimethyl urea until homogenous mixture is achieved. The temperature is maintained below ambient temperature and reaction is further continued for 2-4 hours under catalytic concentration of citric acid. Take sample for quality check and if required specifications are not meet, continue reaction further for 1 hour and again check for quality. If specification is reached fill product in containers, to be used for further formulations of finished product. -
Surface-Water Quality, Oneida Reservation and Vicinity, Wisconsin, 1997-98
U.S. Department of the Interior U.S. Geological Survey Surface-Water Quality, Oneida Reservation and Vicinity, Wisconsin, 1997-98 Water-Resources Investigations Report 00-4179 Prepared in cooperation with the Oneida Tribe of Indians of Wisconsin science for a changing world Surface-Water Quality, Oneida Reservation and Vicinity, Wisconsin, 1997-98 By Morgan A. Schmidt, Kevin D. Richards, and Barbara C. Scudder U.S. GEOLOGICAL SURVEY Water-Resources Investigations Report 00-4179 Prepared in cooperation with the Oneida Tribe of Indians of Wisconsin Middleton, Wisconsin 2000 ruses science for a changing world U.S. DEPARTMENT OF THE INTERIOR BRUCE BABBITT, Secretary U.S. GEOLOGICAL SURVEY Charles G. Groat, Director Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. For additional information write to: Copies of this report can be purchased from: District Chief U.S. Geological Survey U.S. Geological Survey Branch of Information Services 8505 Research Way Box 25286 Middleton, Wl 53562-3586 Denver, CO 80225-0286 CONTENTS Abstract ............................................................... 1 Introduction............................................................................................._^ 2 Description of Oneida Reservation study area............................................................................................................ 2 Factors affecting surface-water quality...................................................................................................................... -
Environmental Health Criteria 63 ORGANOPHOSPHORUS
Environmental Health Criteria 63 ORGANOPHOSPHORUS INSECTICIDES: A GENERAL INTRODUCTION Please note that the layout and pagination of this web version are not identical with the printed version. Organophophorus insecticides: a general introduction (EHC 63, 1986) INTERNATIONAL PROGRAMME ON CHEMICAL SAFETY ENVIRONMENTAL HEALTH CRITERIA 63 ORGANOPHOSPHORUS INSECTICIDES: A GENERAL INTRODUCTION This report contains the collective views of an international group of experts and does not necessarily represent the decisions or the stated policy of the United Nations Environment Programme, the International Labour Organisation, or the World Health Organization. Published under the joint sponsorship of the United Nations Environment Programme, the International Labour Organisation, and the World Health Organization World Health Orgnization Geneva, 1986 The International Programme on Chemical Safety (IPCS) is a joint venture of the United Nations Environment Programme, the International Labour Organisation, and the World Health Organization. The main objective of the IPCS is to carry out and disseminate evaluations of the effects of chemicals on human health and the quality of the environment. Supporting activities include the development of epidemiological, experimental laboratory, and risk-assessment methods that could produce internationally comparable results, and the development of manpower in the field of toxicology. Other activities carried out by the IPCS include the development of know-how for coping with chemical accidents, coordination -
Ethoprophos (149)
35 ETHOPROPHOS (149) First draft prepared by Trijntje van der Velde-Koerts and Bernadette C. Ossendorp, National Institute of Public Health and the Environment (RIVM), Bilthoven, The Netherlands EXPLANATION Ethoprophos, a nematicide and soil-insecticide, was evaluated for residues in 1984 and in 1987. The toxicology of ethoprophos was periodically reviewed by the 1999 JMPR. Ethoprophos was listed as a priority compound under the periodic re-evaluation programme of the 30th Session of the CCPR (ALINORM 99/24 App VII) for residue review by the 2001 JMPR. The manufacturer requested the postponement of the residue evaluation. The basic manufacturer supplied information on identity, metabolism and environmental fate, residue analysis, use pattern, residues resulting from supervised trials on strawberry, banana, cucumber, melon, pepper, tomato, potato, sweet potato and sugar cane, fate of residues during storage and in processing, residues in food in commerce or at consumption and national maximum residue limits. IDENTIT ISO common name: ethoprophos Chemical name IUPAC: O-ethyl S,S-dipropyl phosphorodithioate CAS: O-ethyl S,S-dipropyl phosphorodithioate CAS Registry No: 13194-48-4 CIPAC No: 218 Synonyms and trade names: S,S-dipropyl O-ethyl phosphorodithioate; prophos; ethoprop; Mocap; VC9-104; ENT-27318; AE F034142 Structural formula: established by IR, 1H-NMR, 13C-NMR, 31P-NMR, APCI-MS (+/-) and UV-VIS (according to OECD 101) (Boeuf et al., 2000) O P S O S Molecular formula: C8H19O2PS2 (Boeuf et al., 2000) Molecular weight: 242.34 (Boeuf et al., 2000) Physical and chemical properties Pure active ingredient Physical and chemical properties were determined with the pure active ingredient, unless specified otherwise. -
Recent Advances on Detection of Insecticides Using Optical Sensors
sensors Review Recent Advances on Detection of Insecticides Using Optical Sensors Nurul Illya Muhamad Fauzi 1, Yap Wing Fen 1,2,*, Nur Alia Sheh Omar 1,2 and Hazwani Suhaila Hashim 2 1 Functional Devices Laboratory, Institute of Advanced Technology, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia; [email protected] (N.I.M.F.); [email protected] (N.A.S.O.) 2 Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia; [email protected] * Correspondence: [email protected] Abstract: Insecticides are enormously important to industry requirements and market demands in agriculture. Despite their usefulness, these insecticides can pose a dangerous risk to the safety of food, environment and all living things through various mechanisms of action. Concern about the environmental impact of repeated use of insecticides has prompted many researchers to develop rapid, economical, uncomplicated and user-friendly analytical method for the detection of insecticides. In this regards, optical sensors are considered as favorable methods for insecticides analysis because of their special features including rapid detection time, low cost, easy to use and high selectivity and sensitivity. In this review, current progresses of incorporation between recognition elements and optical sensors for insecticide detection are discussed and evaluated well, by categorizing it based on insecticide chemical classes, including the range of detection and limit of detection. Additionally, this review aims to provide powerful insights to researchers for the future development of optical sensors in the detection of insecticides. Citation: Fauzi, N.I.M.; Fen, Y.W.; Omar, N.A.S.; Hashim, H.S. Recent Keywords: insecticides; optical sensor; recognition element Advances on Detection of Insecticides Using Optical Sensors.