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Related Concept Videos

Volatilization01:10

Volatilization

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Volatilization gravimetry is an analytical technique that measures the mass lost due to the volatilization of the substance. This technique is used to estimate the amount of volatile material in a sample. To perform this method, heat a known amount of the sample to a high temperature in a crucible or other suitable vessel. The volatile substance in the sample evaporates, and the vapor is completely expelled from the crucible either by heating the sample or bubbling a stream of inert gas through...
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Light Acquisition02:16

Light Acquisition

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In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
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Protocols for Quantifying Transferable Pesticide Residues in Turfgrass Systems
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Quantifying Dicamba Volatility under Field Conditions: Part I, Methodology.

Leah S Riter1, Erik D Sall1, Naresh Pai1

  • 1Regulatory Sciences , Bayer U.S.-Crop Science , 700 Chesterfield Parkway West , Chesterfield , Missouri 63017 , United States.

Journal of Agricultural and Food Chemistry
|January 29, 2020
PubMed
Summary
This summary is machine-generated.

Measuring herbicide volatility, like dicamba, requires advanced systems. A new validated method shows less than 0.2% of applied dicamba volatilized over three days in field studies.

Keywords:
aerodynamic (AD)analytical methoddicambafluxintegrated horizontal flux (IHF)volatility

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Area of Science:

  • Environmental Chemistry
  • Agricultural Science
  • Atmospheric Science

Background:

  • Assessing herbicide volatility is crucial for environmental protection.
  • Existing methods for quantifying herbicide off-site movement are often complex and require validation.

Purpose of the Study:

  • To present a comprehensive system for measuring dicamba (a common herbicide) volatility in agricultural settings.
  • To validate field sampling and flux methodologies for accurate air concentration measurements.

Main Methods:

  • Development and interlaboratory validation of an analytical method for trace-level dicamba detection in air samples (PUF samplers).
  • Field trials to validate sampling and flux methodologies, comparing predicted and measured off-target dicamba concentrations.
  • Application of the validated system in a case study on agricultural plots.

Main Results:

  • The validated analytical method achieved a limit of quantitation of 1.0 ng/PUF for dicamba.
  • Field validation demonstrated agreement between predicted and measured dicamba air concentrations.
  • A case study showed that less than 0.2 ± 0.05% of applied dicamba volatilized over a 3-day period.

Conclusions:

  • A robust system for quantifying herbicide volatility in agricultural environments has been successfully developed and validated.
  • The findings indicate low volatility of dicamba under typical agricultural conditions, supporting risk assessment efforts.