Výsledky vyhledávání - "Frank J Schenck"

Assessing Children’s Dietary Pesticide Exposure: Direct Measurement of Pesticide Residues in 24-Hr Duplicate Food Samples

Autor: Chensheng Alex Lu, Frank J Schenck, Jon W. Wong, Melanie A. Pearson

Publikováno v: Environmental Health Perspectives

Background The data presented here are a response to calls for more direct measurements of pesticide residues in foods consumed by children and provide an opportunity to compare direct measures of pesticide residues in foods representing actual consu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b91530f0008314fbce5f5ea30e83c2dc
https://doi.org/10.1289/ehp.1002044

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Rapid Method for the Determination and Confirmation of Fluoroquinolone Residues in Catfish Using Liquid Chromatography/Fluorescence Detection and Liquid Chromatography-Tandem Mass Spectrometry

Autor: Frank J Schenck, Sarah E McMullen, Victor A Vega

Publikováno v: Journal of AOAC INTERNATIONAL. 92:1233-1240

A simplified method for the extraction and determination of four fluoroquinolone (FQ) residues (ciprofloxacin, enrofloxacin, sarafloxacin, and difloxacin) in catfish is presented. In this method, the FQ residues were extracted with acidified acetonit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7b7864f14d5ae5649d8bb598a0921708
https://doi.org/10.1093/jaoac/92.4.1233

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Multiresidue Analysis of 102 Organophosphorus Pesticides in Produce at Parts-per-Billion Levels Using a Modified QuEChERS Method and Gas Chromatography with Pulsed Flame Photometric Detection

Autor: Chenseng Lu, Frank J Schenck, LaTonya M. Mitchell, Jing Li, Jon W. Wong, Jim R Holcomb

Publikováno v: Journal of AOAC INTERNATIONAL. 92:561-573

A multiresidue method for the analysis of organophosphorus pesticides in fresh produce at levels down to 1.0 g/kg (ppb) has been developed using a modification of the QuEChERS (quick, easy, cheap, effective, rugged, and safe) procedure. The procedure

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3e1c8955b9a4462935ee510ac28d1084
https://doi.org/10.1093/jaoac/92.2.561

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A Rapid Multiresidue Method for Determination of Pesticides in Fruits and Vegetables by Using Acetonitrile Extraction/Partitioning and Solid-Phase Extraction Column Cleanup

Autor: Frank J Schenck, Jon W. Wong, Amy N Brown, Michelle Reliford, Alesia Parker, Lynda V. Podhorniak

Publikováno v: Journal of AOAC INTERNATIONAL. 91:422-438

A modification of a rapid and inexpensive multiresidue method for determination of pesticides in fruits and vegetables (QuEChERS method) is presented. Samples were extracted by shaking with acetic acidacetonitrile (1 + 99). Water was removed by liqui

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5bfa73e4787d2c2ed8636c97ea1da68f
https://doi.org/10.1093/jaoac/91.2.422

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Use of Griess Reagent Containing Vanadium(III) for Post-Column Derivatization and Simultaneous Determination of Nitrite and Nitrate in Baby Food

Autor: John A Casanova, Sarah E McMullen, Frank J Schenck, Lois K Gross

Publikováno v: Journal of AOAC INTERNATIONAL. 89:447-451

An ion chromatographic method with post-column derivatization and spectrophotometric detection is presented for the determination of nitrate and nitrite (NOx) in baby food. NOx residues found naturally or added as preservatives were extracted from ba

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::efee5742e79ce4d6bb82acbcc4b00c58
https://doi.org/10.1093/jaoac/89.2.447

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Liquid Chromatographic Determination of N-Methyl Carbamate Pesticide Residues at Low Parts-Per-Billion Levels in Eggs

Autor: John A Casanova, Frank J Schenck, Lynda V. Podhorniak, James Hobbs, Daniel J. Donoghue

Publikováno v: Journal of AOAC INTERNATIONAL. 89:196-200

A reversed-phase liquid chromatographic (LC) method is presented for the analysis of N-methyl carbamate pesticide residues and piperonyl butoxide in eggs at levels as low as 2 gkg (ppb). The study was undertaken to provide data for dietary exposure e

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c7581074142bc25e1f0388a8eba55459
https://doi.org/10.1093/jaoac/89.1.196

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Ion Chromatographic Determination of Nitrate and Nitrite in Vegetable and Fruit Baby Foods

Autor: John A Casanova, Sarah E McMullen, Frank J Schenck, Lois K Gross

Publikováno v: Journal of AOAC INTERNATIONAL. 88:1793-1796

An ion chromatographic method was developed for the determination of nitrate and nitrite in vegetable and fruit baby foods. The introduction of nitrate or nitrite to food may be natural or artificial as a preservative. Because of the higher pH found

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b31ce10c4690b5485cdd2c99089c599c
https://doi.org/10.1093/jaoac/88.6.1793

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Assessing the consequences of the pesticide methoxychlor: neuroendocrine and behavioral measures as indicators of biological impact of an estrogenic environmental chemical

Autor: Michael L. Quinn, Julie M. Wu, N. Thompson, Frank J Schenck, Julie L. Hazelton, Daniel J. Donoghue, Mark Jaber, Mahmoud Abdelnabi, Joanne Beavers, Mary Ann Ottinger, Michael Ruscio

Publikováno v: Brain Research Bulletin. 65:199-209

Japanese quail provide an advantageous avian model for assessing long-term biological consequences of endocrine disrupting chemicals (EDCs). These studies examined route of exposure and vulnerability to biological impact of EDCs over the life cycle i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c7d53f9e1b3026390f88f92ca8eb9f2c
https://doi.org/10.1016/j.brainresbull.2004.11.019

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Multiresidue Method for N-Methyl Carbamates and Metabolite Pesticide Residues at the Parts-per-Billion Level in Selected Representative Commodities of Fruit and Vegetable Crop Groups

Autor: Lynda V Podhorniak, Frank J Schenck, Alexander Krynitsky, Francis Griffith

Publikováno v: Journal of AOAC INTERNATIONAL. 87:1237-1251

A reversed-phase liquid chromatographic method with both fluorescence and mass spectrometric detection is presented for the determination of 13 parent N-methyl carbamate pesticides and their metabolites, as well as piperonyl butoxide, for a total of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b4634abbec8e03e65c909b2e54c0a49a
https://doi.org/10.1093/jaoac/87.5.1237

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