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| Machado,Simone Caetani; Landin-Silva,Mariane; Maia,Patrícia Penido; Rath,Susanne; Martins,Isarita. |
| The development of a QuEChERS-HPLC-DAD method using a Lichrospher 60 RP-Select B column (250 x 4.6 mm x 5 µm) at 40ºC, mobile phase constituted by phosphate buffer:acetonitrile (75:25, v/v) at a initial flow rate of 0.5 mL min-1, increased by 1.2 mL min-1 and at 265 nm is presented for simultaneous determination of sulphadiazine, sulphametoxipiridazine and sulphamethoxazole in chicken breast samples. QuEchERS is inexpensive, fast and easy, and the extraction of the analytes of the matrix was successfully employed. In addition, the method presented linearity, in the range of 25, 50, 100, 150, 175, and 200 µg kg-1, precision, selectivity and sensitivity. The intraday precision (RSD %) for QuEChERS method was between 3.6-10.8 (SDZ), 6.9-14.1 (SPZ) and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: QuEChERS; Sulphonamides determination; Veterinary drugs residues; Chicken breast; HPLC-DAD. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502013000100017 |
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| GONÇALVES,Luana; DALLA ROSA,Andréia; GONZALES,Samantha Lemke; FELTES,Maria Manuela Camino; BADIALE-FURLONG,Eliana; DORS,Giniani Carla. |
| Abstract The objective of this work was to determine aflatoxin M1 in fresh milk from fifty-two small farms in the city of Concórdia - SC, Brazil. Samples from the cooling tanks of each property were collected from November 2014 to January 2015. The QuEChERS method was used for the extraction of aflatoxin M1, and quantification was performed in UHPLC-FL. 40.4% of the analyzed samples (eg, 21 samples) showed contamination levels by aflatoxin M1 above the maximum limit allowed by the Brazilian regulation, which is 0.5 μg L-1. These results suggest the importance of implementing Good Practices in obtaining feed for dairy cows, since the contamination of milk by aflatoxin M1 occurs through the biotransformation of aflatoxin B1, after the ingestion of feed or... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aflatoxins; QuEChERS; UHPLC-FL. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612017000700011 |
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| SILVA, P. T. de S. e; SOUZA, D. R. C. de; FERRACINI, V. L.. |
| O uso indiscriminado dos pesticidas vem trazendo preocupação, principalmente quanto à segurança alimentar com relação às frutas e hortaliças. Neste contexto, foi validado um método multirresíduo capaz de detectar e quantificar resíduos de pesticidas que são empregados na cebolicultura do Vale do São Francisco. Para a extração dos pesticidas, utilizou-se o método de extração QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) e determinação por GC-MS/MS triplo quadrupolo e UPLC-ESI-MS/MS triplo quadrupolo. Esse método foi validado com boa linearidade (R>0,99) para os pesticidas estudados na matriz cebola. As recuperações variaram de 63,1% a 96,2% com desvio padrão relativo (RSD) de até <11,5% para a técnica de GC-MS/MS, enquanto para... |
| Tipo: Folhetos |
Palavras-chave: QuEChERS; GC-MS/MS; LC-ESI-MS/ MS; Vale do São Francisco; Pesticidas; Pesticide; Onion; Cebola; Agrotóxico; Resíduo químico; Análise química; Praga; Allium Cepa. |
| Ano: 2017 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1088289 |
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| Bueno, M. J. Martinez; Boillot, C.; Munaron, Dominique; Fenet, H.; Casellas, C.; Gomez, E.. |
| Coastal areas are subject to growing pressures and impacts due to increasing of the human activities. Lipophilic organic contaminants, such as polycyclic aromatic hydrocarbons (PAHs) or polychlorinated biphenyls (PCBs), have been monitored for decades within biomonitoring programs. However, until now, little information on the detection of called “emerging contaminants” as hydrophilic organic compounds, in the marine environment and no data on its metabolites or transformation products in marine organisms is available. In this way, a sensitive analytical methodology for identification and confirmation of venlafaxine residues (VEN) and five of its main metabolites in the marine mussels Mytilus galloprovincialis was validated. The sample preparation... |
| Tipo: Text |
Palavras-chave: Antidepressant; Emerging contaminants; Transformation products; Marine organisms; Orbitrap; QuEChERS. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00168/27877/26123.pdf |
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