Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Plastic Extraction Disks Make It Easier To Test Levels Of Atrazine In Field Crops

26.04.2005


It’s ‘plastic please’ when it comes to scientists’ choice of pesticide-water sampling devices in field crops.



Wide acceptance has been building for the compact plastic disks over glass containers which are used to collect water samples and determine threatening levels of pesticide runoff. Experts say the glass containers were prone to break during transit from field to the laboratory, and have allowed chemicals to degrade prior to being analyzed.

The disks are used extensively as part of water quality research involving atrazine with the Texas Agricultural Experiment Station and Texas Cooperative Extension. Atrazine is a herbicide used to control broadleaf and grassy weeds.


The plastic round disks, known as "Solid Phase Extraction Disks," fit in the palm of your hand and filter water and other chemical compounds. Although the disks have made transit of water samples easier, Dr. Scott Senseman and a group of fellow southern region scientists are trying to determine if air temperature impacts samples on the plastic disks during transit. "We’re trying to determine if variations in heat cause differences in chemical stability," said Senseman, an Experiment Station scientist who also heads the Texas A&M University Pesticide Fate Research Laboratory.

"We can send samples in the mail with trace amounts of pesticides, and the temperature could be substantially high anywhere during the trip," he said. "We already know that several compounds are stable when attached to these disks when refrigerated, but what we don’t know is how stable they are at higher temperatures like 40 or 50 degrees Celcius ."

Research has proven that pesticides attached to the disks are stable when testing a variety of compounds used as common crop protection chemicals, Senseman said. And the disks are easier to handle than glass containers. "Usually, in pesticide water monitoring, we have to go and collect samples in glass jars, put them in a cooler filled with ice and hope that the samples don’t degrade from the time the sample was collected to the time it gets back to the lab for analysis," Senseman said.

Since the disks act as filters, they also have been an effective storage medium for pesticide samples than glass containers, Senseman noted. "Most compounds monitored in our studies could be filtered through the disks and temporarily stored there until transported back to the laboratory for analysis. The disks are unbreakable and smaller, therefore, providing a potentially better transportation vehicle for chemical analytes."

Another benefit is some of the samples may take an hour or two to filter in the laboratory. The plastic disks can be used in the field to extract samples during transport from one collection site to the next, Senseman noted.

Blair Fannin | EurekAlert!
Further information:
http://www.tamu.edu

More articles from Agricultural and Forestry Science:

nachricht How much drought can a forest take?
20.01.2017 | University of California - Davis

nachricht Plasma-zapping process could yield trans fat-free soybean oil product
02.12.2016 | Purdue University

All articles from Agricultural and Forestry Science >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Traffic jam in empty space

New success for Konstanz physicists in studying the quantum vacuum

An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...

Im Focus: How gut bacteria can make us ill

HZI researchers decipher infection mechanisms of Yersinia and immune responses of the host

Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...

Im Focus: Interfacial Superconductivity: Magnetic and superconducting order revealed simultaneously

Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.

While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...

Im Focus: Studying fundamental particles in materials

Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales

Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...

Im Focus: Designing Architecture with Solar Building Envelopes

Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.

As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Sustainable Water use in Agriculture in Eastern Europe and Central Asia

19.01.2017 | Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

 
Latest News

Helmholtz International Fellow Award for Sarah Amalia Teichmann

20.01.2017 | Awards Funding

An innovative high-performance material: biofibers made from green lacewing silk

20.01.2017 | Materials Sciences

Ion treatments for cardiac arrhythmia — Non-invasive alternative to catheter-based surgery

20.01.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>