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Registros recuperados: 23 | |
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MIELE, A.; RIZZON, L. A.; QUEIROZ, S. C. do N. de. |
Summary There is concern about the health problems caused by pesticides in humans, which has led some grape producers to adopt organic procedures in their vineyards, and a certain amount of these grapes are directed to winemaking. Despite the approval awarded to this organic grape production by the certified organizations, there has been a demand to carry out a survey to determine the physicochemical composition of the wine derived from these products. Some of these wines were made from a single grape variety and others from more than one. For this survey, the samples consisted of five bottles of each type of wine, acquired from wineries and supermarkets in the Serra Gaúcha region, RS, Brazil. The analyses were carried out by physicochemical methods:... |
Tipo: Separatas |
Palavras-chave: Vitis Spp; Vinhedos.; Metal; Metal pesado; Mineral; Resíduo; Viticultura; Agricultura Orgânica.; Minerals; Heavy metals; Pesticide residues. |
Ano: 2016 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1047106 |
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Trevizan,Luiz Roberto P.; Baptista,Gilberto C. de; Papa,Geraldo. |
Increasing horticultural production under protected cultivation requires more detailed studies about the occurence of pesticide residues, due to the special and peculiar environment under controlled conditions, in which some pests, that are of little concern in the field, become important. The insecticide acephate and its methamidophos metabolite residues were evaluated in greenhouse-grown tomatoes and compared to an open-field tomato crop. The treatments: (a) check; (b) one application of 75 g a.i. acephate.100 L-1 water; (c) one application of 150 g a.i.100 L-1 water; (d) four applications of 75 g a.i.100 L-1 water were evaluated. Fruit, leaf and soil samples were taken at (-1), zero, 1, 3, 7, 14, 21 days after the last or only application. The... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lycopersicon esculentum; Pesticide residues; Metabolism; Greenhouse. |
Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362005000100008 |
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BARIZON, R. R. M.; SPADOTTO, C. A.; SOUZA, M. D. de; QUEIROZ, S. C. do N. de; FERRACINI, V. L.. |
Nos últimos anos o Brasil atingiu um grande destaque no cenário agrícola internacional, consolidando-se como um dos maiores produtores de commodities agrícolas como soja, milho, café, açúcar, entre outras. Como efeito do modelo agrícola adotado pela maioria dos produtores, visando aumento da produtividade e aumento da área cultivada, o Brasil também tornou-se um dos maiores consumidores de agrotóxicos do mundo (KUGLER, 2012), uma vez que este insumo é imprescindível neste modelo de agricultura. Com o aumento no consumo de agrotóxicos as preocupações com os resíduos destas substâncias em alimentos ganham evidência e tornam- se cada vez mais frequentes. No Brasil várias iniciativas têm sido implementadas com o intuito de garantir níveis seguros de resíduos... |
Tipo: Documentos (INFOTECA-E) |
Palavras-chave: Monitoramento; Agrotóxico; Resíduo; Alimento; Toxidez; Pesticide residues; Food contamination; Maximum residue limits. |
Ano: 2013 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/960481 |
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MONTEIRO, R. T. R.; SILVA, G. H. da; MESSIAS, T. G.; QUEIROZ, S. C. do N. de; ASSALIN, M. R.; SOUZA, D. R. C. de; ALVES, C. H. R.; FERREIRA, A. C.; BLAISE, C.. |
Abstract; Physicochemical and ecotoxicological measurements were employed to appraise the water quality of the Corumbataí River raw water (RW) intake, and that of its filtered (FW) and treated (TW) waters, processed by the Water Treatment Plant (WTP) of Piracicaba (SP, Brazil) during 2010. Some herbicides: ametrine, atrazine, simazine and tebuthiuron, were measured, with levels ranging from 0.01 to 10.3 microgram-g L-1. These were lower than those required to produce ecotoxicological effects to aquatic life based on published literature. Similarly, trihalomethanes, such as chloroform and bromodichloromethane produced as a result of the WTP process were also shown to be present in concentrations that would neither harm environmental nor human health.... |
Tipo: Separatas |
Palavras-chave: Resíduos de herbicidas; Trihalometanos; Água tratada; Qualidade da água; Poluição da água; Análise química; Análise física; Toxidez; Organismo aquático; Daphnia magna; Water pollution; Pesticide residues. |
Ano: 2014 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/997184 |
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NAKANO,Viviane Emi; KUSSUMI,Tereza Atsuko; LEMES,Vera Regina Rossi; KIMURA,Iracema de Albuquerque; ROCHA,Sonia Bio; ALABURDA,Janete; OLIVEIRA,Maria Celeste Cardeal de; RIBEIRO,Reinaldo Amauri; FARIA,Ana Lúcia Rosa; WALDHELM,Kennia Cristian. |
Pesticides in “PERA” orange samples (N = 57) from São Paulo City, Brazil were assessed and the pesticide intake contribution was estimated for chronic risk assessment. Seventy-six pesticides were evaluated by the gas chromatography multi-residue method, including isomers and metabolites (4.332 determinations). The mean recoveries at the limit of quantification level were in the range of 72-115% and the relative standard deviation for five replicate samples was 1-11%. The limits of detection and quantification ranged from 0.005 to 0.4 mg.kg−1 and from 0.01 to 0.8 mg.kg−1, respectively. Pesticides were found in 42.1% of the samples at levels ranging from 0.06 to 2.9 mg.kg−1. Of the contaminated samples, 3.5% contained residues (bifenthrin and clofentezine)... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pesticide residues; Oranges; Public health; Risk assessment; Chromatography. |
Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612016000100040 |
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SERRA, E. G.; MAZZEI, J. R. F.; FREIRE, E.; CARDOSO, M. H. W. M.; BASTOS, L. H. P.; OLIVEIRA, A. C. de; MACEDO, J. R. de. |
In this work, an analytical method for the determination of residues was optimized for the focus pesticides: Azoxystrobin, Boscalid, Carbendazim, Chlorantraniliprole, Clothianidin, Diafenthiuron, Difenoconazole, Dimethomorph, Spinetoram, Spinosad A, Spinosad D, Fenuron, Imidacloprid, Indoxacarb, Metalaxyl M, Methoxyfenozide, Thiamethoxan in soil derived from the tomato crop, to compare the contamination levels of these compounds in samples. The modified QuEChERS extraction method and Ultra Performance Liquid Chromatography coupled to Sequential Mass Spectrometry were used (CLUE-MS/MS), with an electronebulization ionization source in ESI (+/-) mode. The method consisted of extracting 15.0 g of soil with 15 mL of saturated calcium hydroxide solution pH 12.3... |
Tipo: Anais e Proceedings de eventos |
Palavras-chave: Contaminants in soils; QuEChERS; UPLC-MS/MS; Pesticide residues. |
Ano: 2021 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1145910 |
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ASSALIN, M. R.; QUEIROZ, S. C. do N. de; FERRACINI, V. L.; PARAIBA, L. C.; NARDOCCI, A. C.. |
Um método para determinação multiresíduo de 32 pesticidas baseado em cromatografia líquida acoplada à espectrometria de massa UPLC ? ESI ? MS/MS, operado em modo positivo de ionização, sem concentração e/ou clean up para consumo humano. Os limites de quantificação variaram de 0,07 µg L-1 a 2,4 µg L-1, todos abaixo dos valores máximos permitidos pela Portaria do MS 2914/11 de 12/12/2011. Foram monitoradas a resposta de dois íons (duas reações) por analito no modo MRM, com injeção direta de 20µL e tempo de corrida de 10,3 min. As curvas de calibração foram lineares para todos os analitos com recuperação de 90 % e desvio padrão relativo de ?20%. |
Tipo: Separatas |
Palavras-chave: Injeção direta; Validação; Agrotóxico; Resíduo; Água; Análise química; Cromatografia; Espectrometria; Pesticide residues; Liquid chromatography; Mass spectrometry. |
Ano: 2017 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1084719 |
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Mwevura, H.; Othman, O.C.; Mhehe, G.L.. |
Water samples were collected from Msimbazi and Kizinga rivers in Dar es Salaam and from the coastal marine environment receiving waters from these rivers during both the wet season and the dry season and analysed for various organochlorine pesticide residues using GC-ECD. The pesticides p,p’-DDE, p,p’-DDT, dieldrin and g-HCH were the only organochlorines detected at significantly greater concentrations above detection limits. There was a marked difference on the frequency of pesticide residue detection during the two seasons. All the wet season samples and 37.5% of the dry season samples contained p,p’-DDE at concentrations ranging from 0.05 to 0.45mg/l and 0.08 to 0.20mg/l respectively. p,p’-DDT was detected in 25% of the dry season samples at a... |
Tipo: Journal Contribution |
Palavras-chave: Pesticides; Water pollution; Pesticide residues; Http://aims.fao.org/aos/agrovoc/c_16154. |
Ano: 2002 |
URL: http://hdl.handle.net/1834/819 |
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Registros recuperados: 23 | |
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