Methods development and implementation for the National Pesticide Survey

Munch, David J.; Graves, Robert L.; Maxey, Robert A.; Engel, Tina M.

doi:10.1021/es00080a001

Cited by 35 publications

(15 citation statements)

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“…We now know that the use of fertilizers and pesticides in U.S. corn production has caused contamination of surface and ground water (US EPA, 1988;Munch et al, 1990). Agricultural scientists have developed an extensive array of methods for testing for water contamination at specific sites, and predicting the water contamination under varying physical and climatic conditions.…”

Section: The Need For Multidisciplinary Collaboration In Valuation Rementioning

confidence: 99%

Why Scientists Should Talk to Economists

Antle

Wagenet

1995

Agronomy Journal

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This essay explains how economics plays a key role in enhancing the value of publicly funded agricultural research. Economics provides research institutions with the tools they need to be accountable to society and better able to set research priorities and design research programs that are consistent with public policy objectives while meeting the standards of good science. We first describe a multidisciplinary approach to setting research priorities and assessing research impacts. A systematic framework is required, so that economic data and data from other scientific disciplines can be collected and integrated using common units of measurement. Second, we address research designs needed to meet the standards of good science while also satisfying the standards of accountability and policy relevance. As scientists become involved in the priority setting process, they become aware of the ways that their research can contribute to the mission of publicly funded research. Finally, we address the problems that arise in valuing the economic, environmental, and human health impacts of agricultural production systems for priority setting and impact assessment. As with the priority setting and design stages of research, multidisciplinary collaboration is also a critical element of the valuation stage of impact assessment.

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Section: The Need For Multidisciplinary Collaboration In Valuation Rementioning

confidence: 99%

Why Scientists Should Talk to Economists

Antle

Wagenet

1995

Agronomy Journal

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“…[1][2][3] It is not surprising that herbicides considerably contribute to the contamination of soil, surface, and ground water, and particularly to the human body through the ecological food chain. [1][2][3] It is not surprising that herbicides considerably contribute to the contamination of soil, surface, and ground water, and particularly to the human body through the ecological food chain.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Retention Behavior for Herbicides in Micro‐HPLC with Temperature Changes

Kim

Lee

et al. 2003

Journal of Liquid Chromatography & Related Technologies

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The purpose of this study is to improve the detection limit for trace herbicides, and to separate all samples within a short time with the combination of temperature and flow programming with micro-reversed-phase liquid chromatography (RPLC). The optimum condition for separation was ACN : 0.05 M NaH 2 PO 4 (46 : 54) (v=v), pH ¼ 4.3, 40 C. The mass sensitivity is in the range between 0.086 Â 10 À13 g and 3.34 Â 10 À13 g in micro-HPLC (HPLC). Micro-HPLC exhibits higher mass sensitivity and better heat transfer than conventional HPLC. Thus, in the case of micro-HPLC, the retention behavior of herbicides is easily determined according to the change of temperature. Especially, retention of triazines is decreased to a lesser extent with the increase of column temperature than that of other herbicides. This tendency has been accounted for the thermodynamic parameters DH and DS . The DS for triazines is less negative than that for phenoxy acids, esters, and others. The chromatograms of herbicides were obtained within a short time with using both temperature and flow gradient, than with isocratic, isothermal, and isorheic conditions. When the mobile phase flow rate and the column temperature were changed simultaneously during the separation run, the analysis time was shortened up to 50%, while the separation efficiency was preserved.

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“…Furthermore, the metabolites of pesticides are even more toxic than their parent compounds [7,8]. This explains the initiative of the National Pesticides Survey, in a joint project between EPA's Office of Drinking Water and the Office of Pesticide Programs to include many pesticides and their metabolites in their monitoring programs [9,10].…”

Section: Introductionmentioning

confidence: 99%

Electrically driven microseparation methods for pesticides and metabolites: V. Micellar electrokinetic capillary chromatography of aniline pesticidic metabolites derivatized with fluorescein isothiocyanate and their detection in real water at low levels by laser-induced fluorescence

Wall

Rassi

2001

Electrophoresis

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Anilines are important pollutants occurring in the environment as industrial discharges as well as the transformation products (i.e., metabolites) of a wide variety of commonly used pesticides. In this report, we describe the precolumn derivatization of anilines with fluorescein isothiocyanate (FITC) and their subsequent separation and detection by capillary electrophoresis-laser induced fluorescence (CE-LIF) detection. The FITC-aniline derivatives were readily detected at the 10(-10) M level. This limit of detection (LOD) was achieved in the presence of glycosidic surfactants complexed with borate at alkaline pH yielding the so-called in situ charged micelles. The glycosidic surfactants evaluated were n-octyl- and n-nonylglucopyranoside. Furthermore, and under optimum conditions, the FITC precolumn derivatization of the anilines was performed in real water (e.g., tap and lake water) spiked with anilines at the LOD level. The water matrices showed marginal effects on the extent of derivatization at the LOD level, and the possible interferents in the water samples did not affect the FITC-solute signal due to the selectivity of the derivatization and detection schemes. Besides filtration from microparticles, the real water samples did not necessitate extensive sample cleanup prior to derivatization.

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Methods development and implementation for the National Pesticide Survey

Cited by 35 publications

References 0 publications

Why Scientists Should Talk to Economists

Why Scientists Should Talk to Economists

Investigation of Retention Behavior for Herbicides in Micro‐HPLC with Temperature Changes

Electrically driven microseparation methods for pesticides and metabolites: V. Micellar electrokinetic capillary chromatography of aniline pesticidic metabolites derivatized with fluorescein isothiocyanate and their detection in real water at low levels by laser-induced fluorescence

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