Low temperature cleanup procedure for pesticides and their metabolites in biological samples

McLeod, H. A.; Wales, P. J.

doi:10.1021/jf60181a048

Cited by 38 publications

(4 citation statements)

References 8 publications

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“…Estes apresentaram recuperação superiores a 70% para uma menor quantidade de compostos (teste 3 para 77,1% dos compostos e teste 4 para 83,3% dos compostos). Segundo estudos prévios 41 é necessária a agitação dos extratos durante a etapa de precipitação a baixa temperatura com banho de gelo seco, para prevenir a oclusão de compostos solúveis na matriz lipofílica durante a rápida etapa de precipitação. Este procedimento de agitação não foi realizado durante o desenvolvimento deste trabalho, e isto pode ter contribuído para redução no número de compostos com recuperações superiores a 70% nos testes realizados com precipitação a baixa temperatura.…”

Section: Otimização Do Método Quechersunclassified

DETERMINATION OF PESTICIDE RESIDUES IN BOVINE MILK USING A MODIFIED QuEChERS METHOD AND GC-MS/MS

Bandeira¹,

Munaretto²,

Rizzetti³

et al. 2014

Química Nova

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DETERMINATION OF PESTICIDE RESIDUES IN BOVINE MILK USING A MODIFIED QuEChERS METHOD AND GC-MS/MS. Considering the possibility that pesticides used in cattle raising produce residues in milk and cause harm to public health, this study developed a multiresidue method for determination of pesticide residues in bovine milk, using a modified QuEChERS method for sample preparation, and quantification by GC-MS/MS. The method proved to be efficient, resulting in satisfactory recoveries in the range 71.1 to 117.4%, for 45 of the 48 compounds analyzed with RSD values ≤ 17.3%. The method LOD and LOQ were3.0 and 10.0 µg L -1 , respectively, except for cyfluthrin which showed 7.5 and 25.0 µg L -1 .

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Section: Otimização Do Método Quechersunclassified

DETERMINATION OF PESTICIDE RESIDUES IN BOVINE MILK USING A MODIFIED QuEChERS METHOD AND GC-MS/MS

Bandeira¹,

Munaretto²,

Rizzetti³

et al. 2014

Química Nova

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“…), the solvent was evaporated off, and the lipid was redissolved in acetone. The acetone/lipid mixture was then taken through a series of low-temperature (-70°C) precipitations to remove the fat, oils, and water from the contaminant residues, following a modified procedure of McLeod and Wales (1972). Care was taken throughout all procedures to prevent exposure to ultraviolet wavelengths and to prevent oxidation of the lipids.…”

Section: Preparation Of Extractsmentioning

confidence: 99%

Mutagenicity studies on herring gulls from different locations on the great lakes. II. Mutagenic evaluation of extracts of herring‐gull eggs in a battery ofin vitromammalian and microbial tests

1983

Journal of Toxicology and Environmental Health

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Herring-gull (Larus argentatus) eggs were collected from five locations on the Great Lakes and from one colony on the Atlantic coast for organochlorine analysis and mutagenesis testing. The Great Lakes colonies were chosen for their different contaminant levels, while the Atlantic coast colony was used as a relatively clean control. The eggs were homogenized and extracted, and the extracts were tested in the Salmonella/mammalian microsome assay for induction of point mutations and in Chinese hamster ovary (CHO) cells for the induction of sister chromatid exchanges (SCEs) and chromosome aberrations. None of the extracts was mutagenic in Salmonella, either in the presence or absence of metabolic activation. However, all of the extracts, including the clean control, caused significant increases in both the SCE rate and in the number of chromosome aberrations in the CHO cells. There was no apparent relationship between contaminant levels and the magnitude of these responses or the doses at which they occurred, although the chemical analysis indicated a wide range in the concentrations of the different organochlorides present.

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“…The utility of the FPD was seen to be primarily in the identification of crude oils through the use of a dual FID and FPD (6), sulfur containing air-borne pollutants at the ppb level such as H2S and COS (358), and sulfur containing compounds in coal (194), cigarette smoke (346), and diesel exhaust (315). The selectivity of the FPD was illustrated with a single-step cleanup procedure for pesticides and their metabolites in foods and biological tissues (579) and the detection of Cr in urine at 425.4 nm (729). A lower limit of detection of 0.71 ng of B10H14 with a FPD was observed at 546 nm (816).…”

Section: Detectorsmentioning

confidence: 99%

Gas chromatography

Juvet¹,

Cram²

1974

Anal. Chem.

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This review surveys developments in the field of gas chromatography since publication of the last review in this series (178) and covers the years 1972-73. Gas chromatography continues to be one of the most active areas in analytical chemistry. In the 1973 Directory of Membership of the ACS Division of Analytical Chemistry (356), those listing their research specialty as "gas chromatography" were second in numbers only to those listing the drugs compiled by the editorial staff (423) and articles on applications of GC in alcohol analysis (417), hallucinogenic drugs ( 818), the analysis of narcotic analgesics and amphetamines (622), barbiturates (446), and phenothiazine drugs (158).

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Low temperature cleanup procedure for pesticides and their metabolites in biological samples

Cited by 38 publications

References 8 publications

DETERMINATION OF PESTICIDE RESIDUES IN BOVINE MILK USING A MODIFIED QuEChERS METHOD AND GC-MS/MS

DETERMINATION OF PESTICIDE RESIDUES IN BOVINE MILK USING A MODIFIED QuEChERS METHOD AND GC-MS/MS

Mutagenicity studies on herring gulls from different locations on the great lakes. II. Mutagenic evaluation of extracts of herring‐gull eggs in a battery ofin vitromammalian and microbial tests

Gas chromatography

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