Quickfit Florisil Pesticide Trap for Use with Assisted Distillation Technique

McDougall, K. W.

doi:10.1093/jaoac/63.6.1355

Cited by 2 publications

(3 citation statements)

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“…McDougall [43] descreve um tubo de retenção (100 mmx14 mm-65 mm-4,5 mm; 230"; N2-600 ml/min) para gorduras cujo enchimento é efectuado com Florisil. Este sistema simples e de fácil manejo evita o recurso ao arrefecimento.…”

Section: Destilação Assistidaunclassified

“…Novas alterações foram introduzidas por Health e Black [26] utilizando um tubo de destilação assistida que não contêm nem pérolas de vidro nem lã de vidro. A purificação dos pesticidas efectua-se em dispositivo contendo Florisil parcialmente desactivado a 5% com água, semelhante ao de McDougall [43]. A resolução do tubo mostrou-se idêntica do tubo Unitrex anteriormente desenvolvido por Luke e colaboradores [39].…”

Section: Destilação Assistidaunclassified

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Resíduos de Pesticidas Organoclorados em Alimentos Gordos — revisão da metodologia analítica, II. Processos de purificação

Lino¹,

Silveira²

1990

BSPQuimica

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Section: Destilação Assistidaunclassified

Resíduos de Pesticidas Organoclorados em Alimentos Gordos — revisão da metodologia analítica, II. Processos de purificação

Lino¹,

Silveira²

1990

BSPQuimica

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“…Body fat samples were first rendered with heat to produce pure fat. The residues were then extracted using the assisted distillation technique of Heath and Bl?ck (1979) with modifications by McDougall (1980). Recoveries of heptachlor and heptachlor epoxide were 90070( * 4%).…”

Section: Chemical Analysbmentioning

confidence: 99%

Residues in cattle grazed on land contaminated with heptachlor

HARRADINE¹,

McDougall

1986

Australian Vet J

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Heptachlor epoxide residues exceeding the maxlmum resldue limit of 0.2mgl kg have been found in fat of cattle grazed on land previously treated with heptachior prior to planting potatoes or maize. To determlne the residues accumulated in cattle exposed to Contaminated land and the rate of decline on removal from the contamination, steers were grazed on a former potato paddock which had been treated the 2 previous years wlth heptachlor at 1.lkglha. Sol residues In the paddock varied from a total of 0.42mglkg heptachlor and its epoxide at the beginning of the trial to 0.31mglkg after 16 months. Residues in the soil decreased only slightly down to a depth of 300mm. Pasture residues were less than 0.02mglkg (wet basis).Heptachior epoxide residues In the body fat of the steers Increased during 19 months of exposure and reached a maxlmum of 0.72mglkg. In 4 steers removed after 14 weeks exposure, the heptachlor epoxide concentrations continued to increase from a mean of 0.24mglkg to a mean of 0.34mglkg after a further 4 weeks. Concentrations then fell progressively with a half life of 11 weeks in the body fat. There was an apparent relationship between pasture length and body fat residue, with residues Increasing as pasture length decreased.The results of the experiments preclude the option of grazing cattle on pasture grown on soil treated with heptachlor for any extended period of tlme. it Is possible that If short pastures and soft soil are avoided, and If cattle are not exposed to contaminated land for any more than 1 week In each month, then residues would remain below the maxlmum residue limit of O.2mglkg heptachlor.#

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Quickfit Florisil Pesticide Trap for Use with Assisted Distillation Technique

Abstract: A quickfit Florisil pesticide trap is described for use with the assisted distillation technique for the cleanup of pesticide residues in fats. Recoveries of 80–100% were obtained for 9 pesticides. No cooling is needed and there is no measurable carryover of fat from this Florisil trap.

Cited by 2 publications

References 0 publications

Resíduos de Pesticidas Organoclorados em Alimentos Gordos — revisão da metodologia analítica, II. Processos de purificação

Resíduos de Pesticidas Organoclorados em Alimentos Gordos — revisão da metodologia analítica, II. Processos de purificação

Residues in cattle grazed on land contaminated with heptachlor

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