Pesticide Residues
Mostrando 1-12 de 115 artigos, teses e dissertações.
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1. Mitigating the impact of organochlorine and pyrethroid residues in fresh and chemically washed spinach
Abstract Spinach is highly contaminated with different pesticide residues. This study was designed to evaluate organochlorine and pyrethroid pesticide residues present in various washing treatments (T0-T13) of fresh and chemically washed spinach with respect to maximum residues limits. Efficiency of washing solutions (citric acid, acetic acid, garlic extract
Food Sci. Technol. Publicado em: 2021-03
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2. A Simple and Efficient Optimized Solid-Liquid Extraction with Low Temperature Partition Procedure for Dissipation and Translocation Study of Pesticide Residues in Rice Grains
Pesticides are used globally to protect food against pest attack. This study evaluates the dissipation of bifenthrin and deltamethrin residues in unhulled rice and the translocation of these insecticide residues in husked rice stored at 25 °C in a biochemical oxygen demand (BOD) incubator for 35 days. For pesticide determination, the simple and efficient so
J. Braz. Chem. Soc.. Publicado em: 2020-10
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3. DETERMINATION OF THE PESTICIDES IN WATER USED IN THE CULTURE AND PROCESSING OF POTATOES
The contamination of water bodies by pesticide residues through direct flow, leaching and other methods has motivated the development of analytical methods for the determination of these compounds in water. A vortex-assisted liquid-liquid microextraction method followed by gas chromatography coupled to mass spectrometry for the determination of anilazine, li
Quím. Nova. Publicado em: 2020-09
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4. DETERMINAÇÃO DE MULTIRRESÍDUOS DE AGROTÓXICOS EM MÉIS PRODUZIDOS NA REGIÃO DO TRIÂNGULO MINEIRO POR UHPLC-MS/MS
Excessive use of pesticides can lead to the accumulation of residues in different parts of plants, endangering various species and contaminating foods. Honey can be used as an indicator of agricultural contamination and pre-mature bee mortality by pesticides. However, to quantify pesticide residues in honey, high sensitivity analytical methodologies are requ
Quím. Nova. Publicado em: 2020-03
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5. Experimental reproduction of congenital anomalies in the progeny of cows fed apple pomace during pregnancy
RESUMO: O presente trabalho tem por finalidade descrever e discutir os resultados do experimento realizado em vacas prenhes que foram alimentadas com 25kg/dia de bagaço de maçã. Experimentos foram conduzidos em duas etapas, a primeira no ano de 2015, de setembro a dezembro onde foram utilizadas 16 vacas prenhes da raça holandês. Estas foram divididas em
Pesq. Vet. Bras.. Publicado em: 18/07/2019
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6. EXTRAÇÃO EM FASE SÓLIDA DE RESÍDUOS DE AGROTÓXICOS DE ÁGUA SUPERFICIAL, EMPREGANDO UM SORVENTE DE MENOR RETENÇÃO
Solid phase extraction (SPE) is one of the main sample preparation techniques. However, the cost of cartridges and the strong retention of hydrophobic compounds in traditional solid phases are limiting factors for their use. This paper describes the application of lab-made SPE cartridges with low retention material as solid phase, Si(PDAS) - poly(dimethyl-co
Quím. Nova. Publicado em: 2018-06
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7. Determination of Target Pesticide Residues in Tropical Fruits Employing Matrix Solid-Phase Dispersion (MSPD) Extraction Followed by High Resolution Gas Chromatography
A simple method based on matrix solid-phase dispersion (MSPD) extraction and gas chromatography with electron-capture detection (GC-ECD) is employed to determine pesticide residues in the following tropical fruits: banana, mango, melon, papaya and pineapple. In the MSPD proposed method, C18, silica gel and ethyl acetate presented the best results in the extr
J. Braz. Chem. Soc.. Publicado em: 2018-05
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8. OTIMIZAÇÃO DA EXTRAÇÃO SÓLIDO-LÍQUIDO COM PARTIÇÃO EM BAIXA TEMPERATURA PARA DETERMINAÇÃO DE CARBOFURANO EM Cucurbita pepo L (“ABOBRINHA”) POR CROMATOGRAFIA LÍQUIDA DE ALTA EFICIÊNCIA
According to results of the Program of Analysis of Pesticide Residues in Foods of the National Agency of Sanitary in Brazil (2013 to 2015) the zucchini, Cucurbita pepo L is one of the non-hardy vegetables, that presented higher contamination index by pesticides residues. One of these agrochemicals is carbofuran, which although not authorized for this crop, i
Quím. Nova. Publicado em: 2018-02
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9. Development of Manual Shaking and Ultrasound-Assisted Surfactant-Enhanced Emulsification Microextraction for Analysis of Organophosphorus Pesticides in Aqueous Samples
A novel, rapid and efficient manual shaking and ultrasound-assisted surfactant-enhanced emulsification microextraction (M-UASEME) combined with gas chromatography-flame photometric detection (GC-FPD) was developed for the extraction and determination of eight organophosphorus pesticides (OPPs) in tap water and honey samples. The main parameters that affected
J. Braz. Chem. Soc.. Publicado em: 2017-12
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10. DLLME-GC/ECD Method for the Residual Analysis of Parathion-Methyl and its Application in the Study of the UV-Photodegradation Process
A new method has been developed to determine trace levels of organophosphorus pesticide parathion-methyl in water samples by using dispersive liquid-liquid microextraction (DLLME), followed by gas chromatograph coupled with electron capture detector (GC/ECD) analysis. The optimized and validated method showed high extraction recovery (101.1%), high enrichmen
J. Braz. Chem. Soc.. Publicado em: 2017-11
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11. Assessment of human health risk associated with the presence of pesticides in chicken eggs
Abstract The presence of pesticides in the environment is highly toxic to environment and human health. Aim of the study was determination, quantification and assessment of associated health risk due to presence of pesticide residues in chicken eggs using high pressure liquid chromatography. HPLC method was successfully employed and validated. From collected
Food Sci. Technol. Publicado em: 09/03/2017
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12. Determinação de agrotóxicos na água e sedimentos por HPLC-HRMS e sua relação com o uso e ocupação do solo
In present times, the Brazil is in the middle of the largest pesticide consumers worldwide, which demands proper control of environmental contamination. This study evaluated herbicides, acaricide, insecticides and fungicides in water and sediment carried-out from Lageado Tacongava hydrographic basin, Rio Grande do Sul, Brazil. For analysis, a QuEChERS (Quick
Quím. Nova. Publicado em: 2017-02