Discovering DDT: How GCxGC is uncovering an environmental disaster

April 23, 2021

Sunset over the Pacific Ocean, in Seal Beach, California.For years, environmentalists have known about the contamination of DDT in the ocean waters off the California coast. Montrose Chemical Corporation, the largest producer of DDT in the United States from 1947 until 1982, was infamously dumping chemical waste from their manufacturing process into the sewer system, contaminating the Palos Verde Shelf and eventually requiring the area to be designated as a Superfund site in an attempt to clean up the environmental damage. However, the known DDT contamination did not seem to be enough to explain the abnormally high cancer rates in the local sea lions.

Chasing a hunch, David Valentine, a professor of geochemistry and microbiology at UC Santa Barbara, dove deeper.

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Using GCxGC to see MOSH and MOAH

April 1, 2021

LECO Pegasus BT 4DFood contamination by mineral oil hydrocarbons (MOH), which is usually separated into the subclasses of MOSH (Mineral Oil Saturated Hydrocarbons) and MOAH (Mineral Oil Aromatic Hydrocarbons), is a growing concern across the EU and the world. In 2012, the European Food Safety Authority flagged them as a potential health concern, and the increasing research since then has only been expanding our understanding of these hydrocarbons. However, the two main analytical methods suggested to quantify these substances, either an off-line method consisting of a solid phase extraction (SPE) followed by a GC-FID analysis or an on-line, LC-GC-FID method, both can result in inaccuracies and leads to challenges in the end results. Some of these inaccuracies are due to the lack of a strong and robust confirmatory method. However, a GCxGC-TOFMS system, like LECO's Pegasus® BT 4D can help unveil the complexity of contaminated food samples. It has also been suggested by the EFSA to be used as a confirmatory tool in case of uncertain results from other standard methods.

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ChromaTOF® Tile for GCxGC Analyses

January 29, 2021

LECO has released a revolutionary new data analysis software for GCxGC data: ChromaTOF Tile. This software provides an industry-first data comparison tool that identifies statistically significant differences between classes of samples, reducing days-to- weeks of work down to hours, or even minutes. Based on Dr. Robert Synovec’s tile-based Fisher ratio analysis, ChromaTOF Tile partitions the data into a set of regions (tiles) and compares regionalized data. This allows it to disregard normal variances of alignment shifts to focus on where the actual differences are, so users can stop looking at their data and start actually using it.

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Deciphering Complex Tomatoes and Pesticide Residues with GCxGC-TOFMS

January 26, 2021

Tomatoes are the second-most important vegetable crop in the world (arguments over whether or not it should be called a fruit or a vegetable aside!), and thus it is critically important that tomato yields are kept high. Pesticides are the easiest way to control populations that might destroy crops, but we must make sure that the resulting tomatoes are not contaminated. With GCxGC-TOFMS, recognizing and identifying pesticide residue in tomatoes is easier than ever.

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The Difference between Frankincense and Myrrh

December 16, 2020

It's that time of year again, when holiday songs play 24/7 on the radio and people start wondering what, exactly, frankincense and myrrh are and why they make good gifts. LECO placed these two oils in a Pegasus® BT 4D to see the difference.

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Here's what happened on Day 5 of the GCxGC Symposium!

September 18, 2020

Well what a week and what a great final day! 

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Here's what happened on Day 4 of the GCxGC Symposium!

September 18, 2020

Day 4 of the GCxGC Virtual Symposium did not disappoint! The topic of Safety and Security made for another great day of presentations. The quote of the day perhaps was “I like GCxGC because it casts a very broad net on your samples when employing non-targeted analysis strategies.”

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Here's what happened on Day 3 of the GCxGC Symposium!

September 17, 2020

Yet another successful day of presentations on Metabolomics and Breath Analysis... Turning Data into Information (thank you Heather)! Note that there are two interesting events on the horizon The Breath Biopsy Conference and the Multidimensional Workshop.

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Here's what happened on Day 2 of the GCxGC Symposium!

September 16, 2020

Day 2 of the GCxGC Symposium focused on Petroleum and Fuel with some great discussion!

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Here's what happened on Day 1 of the GCxGC Symposium!

September 15, 2020

Day 1 is in the books. What a great start to the 1st Annual GCxGC Symposium!

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