Featured Research

from universities, journals, and other organizations

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

Date:
June 19, 2005
Source:
Texas A&M University - Agricultural Communications
Summary:
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.

Although the disks have made transit of water samples easier, Dr. Scott Senseman, a Texas Agricultural Experiment Station researcher, and a group of fellow southern region scientists are trying to determine if air temperature impacts samples on the plastic disks during transit. (Texas Agricultural Experiment Station photo by Blair Fannin)

COLLEGE STATION - 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.


Story Source:

The above story is based on materials provided by Texas A&M University - Agricultural Communications. Note: Materials may be edited for content and length.


Cite This Page:

Texas A&M University - Agricultural Communications. "Plastic Extraction Disks Make It Easier To Test Levels Of Atrazine In Field Crops." ScienceDaily. ScienceDaily, 19 June 2005. <www.sciencedaily.com/releases/2005/06/050619121441.htm>.
Texas A&M University - Agricultural Communications. (2005, June 19). Plastic Extraction Disks Make It Easier To Test Levels Of Atrazine In Field Crops. ScienceDaily. Retrieved April 21, 2014 from www.sciencedaily.com/releases/2005/06/050619121441.htm
Texas A&M University - Agricultural Communications. "Plastic Extraction Disks Make It Easier To Test Levels Of Atrazine In Field Crops." ScienceDaily. www.sciencedaily.com/releases/2005/06/050619121441.htm (accessed April 21, 2014).

Share This



More Matter & Energy News

Monday, April 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Why Did Nike Fire Most Of Its Nike FuelBand Team?

Why Did Nike Fire Most Of Its Nike FuelBand Team?

Newsy (Apr. 19, 2014) Nike fired most of its Digital Sport hardware team, the group behind Nike's FuelBand device. Could Apple or an overcrowded market be behind layoffs? Video provided by Newsy
Powered by NewsLook.com
Small Reactors Could Be Future of Nuclear Energy

Small Reactors Could Be Future of Nuclear Energy

AP (Apr. 17, 2014) After the Fukushima nuclear disaster, the industry fell under intense scrutiny. Now, small underground nuclear power plants are being considered as the possible future of the nuclear energy. (April 17) Video provided by AP
Powered by NewsLook.com
Horseless Carriage Introduced at NY Auto Show

Horseless Carriage Introduced at NY Auto Show

AP (Apr. 17, 2014) An electric car that proponents hope will replace horse-drawn carriages in New York City has also been revealed at the auto show. (Apr. 17) Video provided by AP
Powered by NewsLook.com
Honda's New ASIMO Robot, More Human-Like Than Ever

Honda's New ASIMO Robot, More Human-Like Than Ever

AFP (Apr. 17, 2014) It walks and runs, even up and down stairs. It can open a bottle and serve a drink, and politely tries to shake hands with a stranger. Meet the latest ASIMO, Honda's humanoid robot. Duration: 00:54 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins