scholarly journals RESÍDUOS DE AGROTÓXICOS PIRETRÓIDES EM HORTALIÇAS

2003 ◽  
Vol 13 ◽  
Author(s):  
MARIA TERESA PLATA OVIEDO ◽  
MARIA CECÍLIA DE FIGUEIREDO TOLEDO ◽  
EDUARDO VICENTE
Keyword(s):  
Gas Chromatography ◽  
Pesticide Residues ◽  
Monitoring Program ◽  
Agricultural Practices ◽  
Brazilian Legislation ◽  
Three Samples ◽  
Pyrethroid Pesticide ◽  
Two Samples ◽  
Pyrethroid Pesticides ◽  
The University

Foram analisados resíduos de Cipermetrina, Deltametrina e Permetrina nas seguintes hortaliças: alface, acelga, chicória, repolho, tomate, chuchu, batata, cenoura, mandioca e mandioquinha. As amostras foram coletadas no restaurante da Universidade Estadual de Campinas, no período de outubro/1998 a abril/2001. Também foram analisadas hortaliças comercializadas nas Centrais de Abastecimento de Campinas, coletadas no período de outubro/2000 a agosto/2001. Os resíduos dos agrotóxicos piretróides foram determinados por cromatografia a gás com detector de captura de elétrons (CG-DCE-63Ni) e a confirmação da identidade dos picos realizada por cromatografia a gás acoplada em espectrômetro de massas (CGEM). Os resultados evidenciaram o uso inadequado desses piretróides, sendo detectados resíduos de Permetrina (2,0 mg/kg) em duas amostras de alface. Em tomate, resíduos de Permetrina (8,6 - 18,8 mg/ kg) foram confirmados em três amostras e de Cipermetrina (3,0 mg/kg) em uma amostra. Em relação à Permetrina, os níveis encontrados em alface e tomate situaram-se acima dos limites máximos de resíduos (LMR) permitidos pela legislação vigente (0,1 mg/kg em alface e 0,3 mg/kg em tomate). Quanto à Cipermetrina, sua presença foi detectada em tomate, embora seu uso seja autorizado somente para as culturas de amendoim, cebola e fumo. Resíduos de Deltametrina não foram encontrados nas amostras analisadas. Esses resultados indicam que as boas práticas agrícolas não estão sendo cumpridas por alguns produtores, sugerindo a necessidade de implementação de programa de monitoramento de piretróides em alface e tomate. PYRETHROID PESTICIDE RESIDUES IN VEGETABLES Abstract Residues of Cypermethrin, Deltamethrin and Permethrin were analysed in the following vegetables: lettuce, swiss chad, chicory, cabbage, tomato, chayote, potato, carrot, cassava and cassava specy. The samples were collected at the restaurant of the University of Campinas (UNICAMP), from October/1998 to April/2001. Vegetables comercialized at “CEASA” the “Centrais de Abastecimento de Campinas” from October/2000 to August/2001, were also analyzed. The pyrethroid residues were determined by gas chromatography with an electron capture detector (ECD-63Ni) and the pesticide identities confirmed by gas chromatography coupled to a mass spectrometer (GC-MS). The results showed that the pyrethroid pesticides were inappropriately used in some vegetables being detected Permethrin residues (2.0 mg/kg) in two samples of lettuce. In tomato, residues of Permethrin (8.6 mg/kg - 18.8 mg/kg) were confirmed in three samples and of Cypermethrin (3.0 mg/kg) in one sample. The levels of Permethrin found in lettuce and tomato were above the maximum levels permitted (LMR) by the brazilian legislation (0.1 mg/kg in lettuce and 0.3 mg/kg in tomato). Cypermethrin residues were detected in tomato, although its use is only allowed in peanut, onion and tobacco. No Deltamethrin residues were detected in the samples analyzed. These results show that the good agricultural practices were not followed by some producers, suggesting the need to implement a monitoring program for the presence of pirethroides in tomato and lettuce.

​Evaluation of Level of Pesticide Residue in Seminal Fluid of Crossbred Bulls

2021 ◽  
Author(s):  
Paramveer Singh Sangha ◽  
Ajeet Kumar ◽  
Mrigank Honparkhe ◽  
Jasbir Singh Bedi ◽  
Ashwani Kumar ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Pesticide Residue ◽  
Seminal Plasma ◽  
Pesticide Residues ◽  
Seminal Fluid ◽  
Reproductive Organs ◽  
Synthetic Pyrethroid ◽  
Pyrethroid Pesticide ◽  
Fresh Semen ◽  
Livestock Development

Background: Pesticides act as endocrine disruptors and cause enormous disturbances in steroidogenesis, spermatogenesis and sexual behavioural display. These toxicants modulate and/or disrupt the reproductive and hormonal environment by acting on hypothalamus, pituitary and reproductive organs. Few studies have been carried out to assess the levels of pesticides in dairy cattle / buffaloes. The information on pesticide residues in body fluids especially blood and semen in breeding bulls is lacking. Method: In the light of above background nineteen fresh semen ejaculates were collected from Milkfed, Khanna and PLDB (Punjab Livestock Development Board), Nabha, Punjab and stored at -80◦C. Immediately after collection, the semen was centrifuged at 4500 × g for 20 min at 4◦C. The supernatant (seminal plasma) was stored at -20◦C until processing for the assessment of pesticide residues using gas chromatography (GC). In the present study on crossbred breeding bulls, the semen samples were analyzed for organochlorines, organophosphates and synthetic pyrethroid pesticide residues. Seven OCP were screened namely Heptachlor epoxide, Chlordane, Fipronil, Lindane, Methoxychlor, op-DDT, Endrin. Eleven OPP were screened namely Chorpyrifos, Dichlorovos, Ethion, Monocrotophos, Malathion, Parathion-methyl, Profenphos, Phorate, Triazophos, Quinalphos and Phosalone and four SP’s namely Cypermethrin, Permethrin, Deltamethrin, Cyalothrin were screened in the semen samples. Semen samples were also assessed for viability, HOST (%) and abnormality (%) for both fresh as well as post thaw samples. Result: None of the semen samples were found positive for any of the above pesticide residues. This may be attributed to the feeding of fodder cultivated at the stations without using any pesticides, hence no pesticide residue found in the semen samples of the crossbred breeding bulls of these semen stations In present study, viability (%) of sperms were found to be significantly higher (p less than 0.05) in fresh (75.57 ± 5.31) as compared to post thaw (70.17 ± 4.64) semen of bulls. The abnormality (%) of sperms was found to be significantly lower (p less than 0.05) in fresh (13.61 ± 3.71) than post thaw (18.22 ± 3.59) semen bulls. Also in present study the host (%) was found 67.23±4.76 in fresh semen which decreased to 46.82±3.55 in post thaw semen.

scholarly journals Multiresidue Analysis of 86 Pesticides Using Gas Chromatography Mass Spectrometry: II-Nonleafy Vegetables

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
M. H. EL-Saeid ◽  
M. T. Selim
Keyword(s):  
Gas Chromatography ◽  
Pesticide Residues ◽  
Crop Protection ◽  
Monitoring Program ◽  
Gas Chromatography Mass Spectrometry ◽  
Hot Pepper ◽  
Multiresidue Analysis ◽  
Mass Selective Detector ◽  
Sample Extract ◽  
Fresh Vegetables

A total of 1057 samples of fresh vegetables from import and domestic production were analyzed (cold pepper, egg plant, carrot, cucumber, potato, hot pepper, cultivation tomato, squash, beans, okra, onions, cauliflower, and green house tomato). The aim of this study was to investigate pesticide residues in market foods in Riyadh, which have been collected from Riyadh Development Company (Al-Tamer Vegetables Market). Pesticide residues were determined by gas chromatography with mass selective detector (GC-MSD). A multiresidue method was developed and described for simultaneous determination of 86 pesticides commonly used in crop protection. This method used to determine 86 pesticide residues with a broad range of physicochemical properties in fresh vegetables related to organophosphorus (OPP), organochlorines (OCP), pyrethroids, and carbamates mainly used in agriculture. Sample extract was cleaned up by using AOAC method. Pesticide residues above the maximum residue limits (MRL) were detected in 15.89% of the total samples (168 from 1057 samples), but 83.90% of the total samples (887 from 1057 samples) has no residues or contained pesticide residues at or below MRL. The detected and most frequently found pesticide residues were permethrin (45 times) and endosulfan (34 times) followed by deltamethrin (27 times). The findings of this study pointed to the following recommendations: the need for a monitoring program for pesticide residues in imported food crops.

scholarly journals DETERMINAÇÃO DE RESÍDUOS DE AGROTÓXICOS ORGANOCLORADOS EM HORTALIÇAS

2002 ◽  
Vol 12 ◽  
Author(s):  
MARIA TERESA PLATA OVIEDO ◽  
MARIA CECÍLIA DE FIGUEIREDO TOLEDO ◽  
EDUARDO VICENTE
Keyword(s):  
Gas Chromatography ◽  
Pesticide Residues ◽  
Detection Limits ◽  
Heptachlor Epoxide ◽  
Endosulfan Sulfate ◽  
Average Recovery ◽  
Pesticides Residues ◽  
Organochlorine Pesticide Residues ◽  
The University

Foram analisados resíduos de Clorotalonil, Aldrin, Dieldrin, Heptacloro, Heptacloro epóxido, Endosulfan alfa, Endosulfan beta e Sulfato de Endosulfan nas seguintes hortaliças: alface, acelga, chicória, repolho, tomate, chuchu, batata, cenoura, mandioca e mandioquinha. As amostras foram coletadas no restaurante da Universidade Estadual de Campinas, no período de abril/1998 a abril/ 2001 e nas Centrais de Abastecimento de Campinas, no período de abril a agosto/2001. Os resíduos dos agrotóxicos organoclorados foram determinados por cromatografia a gás com detector de captura de elétrons (CG-DCE- 63Ni). Os limites de detecção (LD) encontrados para Clorotalonil, Aldrin, Dieldrin, Heptacloro, Heptacloro epóxido, Endosulfan alfa, Endosulfan beta e Sulfato de Endosulfan foram 0,0006, 0,0006, 0,0008, 0,0006, 0,0007, 0,0008, 0,0009 e 0,0016 mg/kg, e os limites de quantificação 0,002, 0,002, 0,003, 0,002, 0,003, 0,003, 0,003 e 0,005 mg/kg, respectivamente. A recuperação média dos agrotóxicos analisados variou de 76,0 a 97,0% em repolho, de 90,0 a 103,0% em tomate e de 81,0 a 106,0% em batata. Em todas as amostras de hortaliças analisadas (n=151), os níveis residuais de agrotóxicos apresentaram-se abaixo dos limites de detecção (LD) do método validado. DETERMINATION OF ORGANOCHLORINE PESTICIDES RESIDUES ON VEGETABLES Abstract Residues of Chlorotalonil, Aldrin, Dieldrin, Heptachlor, Heptachlor epoxide, alpha and beta Endosulfan and Endosulfan sulfate were analysed in the following vegetables: lettuce, swiss chad, chicory, cabbage, tomato, chayote, potato, carrot, cassava and cassava specy. The samples were collected at the restaurant of the University of Campinas, from April/1998 to April/2001 at the “Centrais de Abastecimento de Campinas (CEASA)”, from April to August/2001. The organochlorine pesticide residues were determined by gas chromatography with an electron capture detector (ECD-63Ni). The detection limits of Chlorotalonil, Aldrin, Dieldrin, Heptachlor, Heptachlor epoxide, alpha and beta Endosulfan and Endosulfan sulfate were 0.0006, 0.0006, 0.0008, 0.0006, 0.0007, 0.0008, 0.0009 and 0.0016 mg/kg respectively, and their quantification limits were 0.002, 0.002, 0.003, 0.002, 0.003, 0.003, 0.003 and 0.005 mg/kg. The average recovery of the pesticides varied between 76.0 and 97.0% for cabbage, 90,0 to 103.0% for tomato and 81.0 to 106.0% for potato. The samples analysed (n=151) showed pesticide levels below the detection limits of the validated method.

scholarly journals Byzantine Fourteenth-Century Glazed Vessels Featuring Monograms Excavated in Cherson and the Castle of Cembalo

2020 ◽  
Vol 48 ◽  
pp. 225-253
Author(s):  
Natalia V. Ginkut ◽  
Keyword(s):  
Fifteenth Century ◽  
Fourteenth Century ◽  
Technological Parameters ◽  
Three Samples ◽  
Two Samples ◽  
The Family ◽  
Holy Water ◽  
The University ◽  
Archaeometric Study ◽  
Made In

This paper addresses the Byzantine vessels featuring monograms excavated in Cherson and in Cembalo, and their interpretation and significance for the life of the Greek population of the south-western Crimea. So far, archaeological researches discovered 15 vessels made in Byzantium, which showed monograms of the life of saints (“George,” “Michael,” and “Prodromos”), the family name “Palaiologos,” and also code letters “A” (“relic”) and “K.” These vessels were containers for holy water, and in a few cases, plausibly, for myrrh. These vessels were delivered to Cherson and Cembalo as gifts or eulogiai from Constantinople (?), as a part of ideological propaganda. The comparative archaeometric study of the three samples from Cembalo castle in a lab of the University of Lyon revealed one vessel’s similarity with the products of a fourteenth-century pottery workshop discovered in the vicinity of Istanbul. Although two samples more belong to a group different from the said workshop’s products, they still show similar technological parameters. The chronology of the vessels in question lays within the 1320s–1350s in Cherson and from the second half of the fourteenth to the early fifteenth century in Cembalo.

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