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Exposición a órganoclorados por ingesta de leche pasteurizada comercializada en Cartagena, Colombia
Castilla-Pinedo,Yolanda; Alvis-Estrada,Luís; Alvis-Guzmán,Nelson;
Revista de Salud Pública , 2010, DOI: 10.1590/S0124-00642010000100002
Abstract: objective estimating adult residents' exposure to organochlorine compounds from drinking milk being marketed in the city of cartagena. methods this was a descriptive observational study; 47 samples were taken from different production lots of brands of pasteurised milk being sold in the city of cartagena. the milk samples' fat content was determined by gas chromatography. 596 adults were also surveyed whose dairy product consumption frequency had been investigated to estimate potential and acceptable daily intake and assess the risk of consuming organochlorines. results the people surveyed here were exposed to organochlorine compounds through consuming 12.1 mg/g/day in pasteurised milk being sold in the city of cartagena. 100 % of the samples tested were contaminated with one of the pesticides being studied. the study population had a daily intake (idp) of organochlorine compounds greater than that permitted by fao/who guidelines. conclusion it cannot be recommended that people in cartagena do not drink milk; however, the competent authorities can be requested to require dairy-product producers to launch campaigns to improve the quality of milk from a toxicological point of view.
Residuos de plaguicidas organoclorados en leche pasteurizada comercializada en Ciudad de México Organochlorine pesticide residues in commercial pasteurised milk in Mexico City  [cached]
G PRADO,G. DIAZ,S. VEGA Y LEON,M. GONZALEZ
Archivos de medicina veterinaria , 1998,
Abstract: Los residuos de algunos plaguicidas organo-clorados presentes en lasmuestras de leche pasteurizada analizadas representan un riesgo para lasalud de los consumidores. Se determinó el contenido de plaguicidas organoclorados en 96 muestras de leche pasteurizada, por cromatografía gas líquido. Las muestras fueron colectadas quincenalmente y durante un a o en la Ciudad de México, de cuatro marcas comerciales.En las muestras analizadas se determinó el valor promedio X en μg/gbase grasa, la razón X/LMR y el porcentaje de muestras que sobrepasó el valor LMR. Los valores encontrados fueron los siguientes, respectivamente:(a + b)-HCH, 0.22 μg/g, 2.21 y 47.9%, Lindano, 0.07 μg/g, 0.38 y 8.3%, Aldrín + Dieldrín,0.25 μg/g, 1.67 y 39.5%, Heptacloro + heptacloroepóxido, 0.15μg/g, 1.00 y 23.9%, Endrín, 0.05 μg/g, 2.70 y 37.5% y DDT + metabolitos, 0.12 μg/g, 0.10 y 0.0%. Es altamente recomendable mantener un seguimiento en el control de algunos pesticidas organoclorados presentes en la leche pasteurizada de la Ciudad de México. Milk products are frequently contaminated with toxic organochlorine pesticides.The level of organochlorine pesticide residues of 96 pasteurised milk sampleswas determined by gas-liquid chromatography. The samples were collectedfrom four milk industries in Mexico City. The pesticides found in the pasteurisedmilk samples, their average values, the average value/MRL ratio, and samplepercentages exceeding the Maximum Residue Limits (MRL) were respectively:(a+b)-HCH, 0.22 μg/g, 2.21, (47.9%), Lindane,0.07 μg/g, 0.38, (8.3%), Aldrin + Dieldrin, 0.25 μg/g, 1.67,(39.5%), Heptachlor + Heptachlor epoxide, 0.15 μg/g, 1.00, (23.9%),Endrin, 0.05 μg/g 2.70, (37.5%), DDT and metabolites, 0.12 μg/g,0.10, (0.0%). A follow up study in the control of organochlorine pesticides presentin Mexican pasteurised milk is recommended
Determina??o de herbicidas usados no cultivo de arroz irrigado na regi?o sul do estado de Santa Catarina através da SPME-GC-ECD
Costa, Léa L. F.;Sant'ana, Ernani S.;Suchara, Eliane A.;Benato, Vanira S.;Carasek, Eduardo;
Química Nova , 2008, DOI: 10.1590/S0100-40422008000100017
Abstract: evaluation of the pollution by the herbicides alachlor, propanil and atrazine in water samples from four rivers in the cities of turvo and meleiro, south of santa catarina state, was made using the spme-gc-ecd method. the proposed method was optimized and validated. the correlation coefficients were higher than 0.997 and linear ranges of the analytical curves were 0.1-4; 0.1-2.5 and 0.1-5 μg l-1 for atrazine, alachlor and propanil, respectively. the herbicides were quantified by gc-ecd and identified by gc-ms. both of the selected rivers presented contamination by at least one of the studied herbicides.
Residuos de plaguicidas organoclorados en leche pasteurizada comercializada en Ciudad de México
PRADO,G; DIAZ,G.; VEGA Y LEON,S.; GONZALEZ,M.; PEREZ,N.; URBAN,G.; GUTIERREZ,R.; RAMIREZ,A.; PINTO,M.;
Archivos de medicina veterinaria , 1998, DOI: 10.4067/S0301-732X1998000100006
Abstract: milk products are frequently contaminated with toxic organochlorine pesticides.the level of organochlorine pesticide residues of 96 pasteurised milk sampleswas determined by gas-liquid chromatography. the samples were collectedfrom four milk industries in mexico city. the pesticides found in the pasteurisedmilk samples, their average values, the average value/mrl ratio, and samplepercentages exceeding the maximum residue limits (mrl) were respectively:(a+b)-hch, 0.22 μg/g, 2.21, (47.9%), lindane,0.07 μg/g, 0.38, (8.3%), aldrin + dieldrin, 0.25 μg/g, 1.67,(39.5%), heptachlor + heptachlor epoxide, 0.15 μg/g, 1.00, (23.9%),endrin, 0.05 μg/g 2.70, (37.5%), ddt and metabolites, 0.12 μg/g,0.10, (0.0%). a follow up study in the control of organochlorine pesticides presentin mexican pasteurised milk is recommended
NIVELES DE AFLATOXINA M1 EN LECHE CRUDA Y PASTEURIZADA COMERCIALIZADA EN LA ZONA METROPOLITANA DE GUADALAJARA, MéXICO
Patricia,Landeros; Noa,M; López,Yolanda; González,Delia G; Noa,Elizabeth; Real,M; Juárez,C; Medina,Miriam S;
Revista de Salud Animal , 2012,
Abstract: aflatoxin m1 (afm1) is a milk hygiene quality indicator established in mexico. aflatoxin m1 is a metabolite of aflatoxin b1 (afb1), becoming from contaminated feed. the thermal treatments usually applied to raw milk did not reduce the concentrations on afm1 in milk. the aim of the present work was to conduct a screening of afm1 i raw (n=50) collected from raw milk collecting facilities and 7 pasteurized milk brand (n=84) samples. all the samples tested were both produced in jalisco state and commercialized in guadalajara, mexico. the analyses were performed using the competitive direct elisa kit agraquant? aflatoxin m1 (romer labs). statistical analysis was performed using a one-way anova by sigma stat 3.0 program. afm1 was found in 100% of the tested samples, ranging from < 0.005 to 0.100 μg/l in raw milk, and from < 0.005 to 0.637 μg in pasteurized milk. a total 18.6% (25/134) samples showed levels above maximum residue limit (mrl) established by the european community (0.05 μg/kg), 0.7% (1/134) for raw and 17.9% (24/134) for pasteurized milk. only 0.7% (1/134) of the tested samples exceeded this mrl established in mexico by nom-243-ssa1-2010 which is 0.5 μg/l afm1. statistical differences were found (p<0.05) between sampling months; the highest level was detected in december, while no differences were detected among milk collecting facilities and either among pasteurized milk brands.
南京盐水鸭风味分析spme方法研究  [PDF]
刘源,徐幸莲,周光宏,刘扬岷,王利平,袁身淑
食品科学 , 2004,
Abstract: ?固相微萃取(spme)是在固相萃取(spe)的基础上发展起来的新型萃取分离技术。本文以南京盐水鸭为样品,以处理时间、温度、样品量、萃取头为因素对spme方法进行优化选择,确定南京盐水鸭spme方法的最佳分析测试条件。
Residuos de insecticidas organoclorados presentes en leche cruda comercializada en el departamento de Córdoba, Colombia  [cached]
Díaz Pongutá Basilio,Lans Ceballos Edineldo,Barrera Violeth José Luis
Acta Agronómica , 2012,
Abstract: En el estudio se determinaron residuos de plaguicidas organoclorados en leche cruda proveniente de hatos lecheros del departamento de Córdoba, Colombia. Durante el procedimiento de extracción se utilizó una columna de tierra de diatomeas y como sistema eluyente una mezcla de n-hexano-acetona- acetato de etilo (4:2:1), seguida de metanol al 5% en hexano. Para la determinación se usó un cromató- grafo de gases Perkin Elmer, Autosystem XL con detector captura de electrones, en modo de inyección 'splitless', una columna capilar Rtx-5 30 m, 0.25 mm di y 0.25 μm de espesor de película. El porcen- taje de recuperación para los plaguicidas determinados se encontró entre 88.5 y 96%, los lImites de detección se definieron entre 0.01 y 0.04 ng/g con desviaciones est ndar & 6%. En las 6+ muestras analizadas se determinaron p,p′-DDT, a-HCH, -HCH, aldrín, dieldrín, endrín, heptacloro, heptacloro epóxido y y-clordano, esta7leciendo concentraciones entre 2;.1 y 469.6 ng/g. Palabras clave: Leche de vaca, persistencia de los plaguicidas, plaguicidas organoclorados, residuos
A New SPME Thermal Desorption Interface for HPLC  [PDF]
John Jairo Ríos Acevedo, Mohamed Nour Kayali Sayadi, Luis María Polo Díez
Journal of Analytical Sciences, Methods and Instrumentation (JASMI) , 2013, DOI: 10.4236/jasmi.2013.34028
Abstract:

A new SPME/HPLC interface is developed. It is based on thermal desorption from the SPME fiber and organic solvent collection of the desorbed analytes by sweeping them with an argon flow into a small organic solvent volume which is further injected into the HPLC chromatograph. Extraction and desorption parameters were investigated using five PAHs of different volatilities (naphthalene, acenaphthalene, fluorene, phenanthrene and anthracene) as test compounds and fluorimetric detection. Regression coefficients closed to 0.99 with RDS < 14% (n = 3) and detection limits in the range 0.07 - 0.99 μg.L-1 were found. A method was applied to determine the above PAHs in water samples. The results were compared with those supplied by the 550.1 EPA method showing the agreement of both methods at the 0.05 significance level.

Solid Phase Microextraction (SPME) in Determination of Pesticide Residues in Soil Samples
Rada ?urovi?
Pesticidi i Fitomedicina , 2011,
Abstract: The basic principles and application possibilities of the methods based on solid phase microextraction (SPME) in the analysis of pesticide residues in soil samples are presented in the paper. The most important experimental parameters which affect SPME efficacy inpesticide determination (type and thickness of microextraction fiber, duration of microextraction,temperature at which it is conducted, effect of addition of salts (the effect of efflorescence),temperature and time of desorption, the choice of optimal solvent for pesticide exctraction from the soil and the optimal number of extraction steps), as well as general guidelines for their optimization are also shown. In the end, current applications of SPMEmethods in the analysis of pesticide residues in soil samples are presented.
Determinación y cuantificación de los niveles de compuestos organoclorados en leche pasteurizada
Castilla Pinedo,Yolanda; Mercado Martínez,Iván Darío; González Silva,Germán;
Producción + Limpia , 2012,
Abstract: introduction. contamination due to organochlorine pesticides on food is considered as a serious threat for human health, given their high toxicity, bioaccumulation and persistence. cow milk is used as an indicator of the persistence of these pesticides in the environment, because of the milk's importance and, in general, of the role of dairy products, especially for children. this has been a reason to study pasteurized milk from colombia and compare the results with previous research works in other countries. objective. to determine the remains of organochlorine pesticides contained in liquid pasteurized milk sold by stores located near to pasteurization plants in cartagena. materials and methods. 24 bags of milk, from randomly chosen commercial brands and daily provided, were analyzed. the analytic technique of gas chromatography with detector of micro electrons capture was used to determine the content of organochlorine insecticides. results. for this research work the remains of α-chlordane (0,90 mg/kg), β-chlordane (0,12 mg/kg), endosulfan i (0,04 mg/kg), endosulfan ii (0,001 mg/kg), en-dosulfansulphate (0,002 mg/kg), p,p'-ddt (not detected) p,p'-dde (0,01 mg/kg), p,p'-ddd (0,01 mg/kg), endrin (0,027 mg/kg), endrinketone (0,042 mg/kg) and endrin aldehyde (0,009 mg/kg) were determined. conclusión. the research work concluded that some concentrations of the pesticides analyzed were high when their values were compared to those recommended by fao/who in their maximum residual leveis (mrl).
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