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A blog on the latest applications, articles, & research on chromatography solutions in sample preparation, Ion Chromatography (IC),
High Pressure Liquid Chromatography (HPLC), Ion Chromatography-Mass Spectrometry (IC-MS), Gas Chromatography (GC),
Gas Chromatography-Mass Spectrometry (GC-MS and GC-MS/MS), and software (Chromeleon CDS, LIMS, and ProteinCenter).

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GC-MS & LC-MS Methods for Analysis of Pesticide Poisoning in Wildlife

gc-ms analysis of wildlife poisoning

Did you know that poisons, and pesticides in particular, have been used to kill wildlife all over the world and now 83% of African countries have banned the killing of wildlife with poisons? (Link to study.) I learned that wildlife is poisoned as some animals are considered a nuisance for humans while other animals, birds, and fish are poisoned as they are used as sources of food, traditional medicines, or products. In the study linked to in the first sentence, Dr. Ogada of The Peregrine Fund (National Museums fo Kenya, Kenya), calls for "banning pesticides, improving pesticide regulations and controlling distribution, better enforcement and stiffer penalties for offenders, increasing international support and awareness, and developing regional pesticide centers."

Automated SPE Speeds GC Analysis of Pesticides in Beverages

GC Analysis of Pesticides in fruit drinks

The poster featured in this blog post has a somewhat funny title which caught my eye when I was reviewing the list of the latest and most popular gas chromatography applications from one of our marketing specialists. The other reason I am writing about this application is because it does seem concerning that a study from Spain (referenced in the poster) found that pesticides in fruit-based soft drinks are 300 times higher than those in tap water (link to study).

GC Trace Analysis of Pesticides in Food Oils

trace analysis of pesticides in food oils

I am pleased to feature two recently released methods for the gas chromatography analysis of pesticides in food oils, such as olive oil and a common food oil.

GC-MS/MS Speeds Analysis of 200 Pesticides in Ayurvedic Churna

analysis of ayurvedic medicines

In the fascinating application presented in this blog post, chemists from our Mumbai (India) and Singapore labs collaborated on the development of a fast and precise GC-MS/MS method for the routine determination of multi-residue pesticides in Indian Ayurvedic medicine churna, a blend of ground spices and herbs.

Gas Chromatography Does Wine Analysis!

pesticides in wine

When I received a link to this newstory, titled, From chardonnay to cabernet, malbec to merlot: What's in your wine? (link to article) featuring the analysis of pesticides and other contaminants in wine from one of our marketing communications specialists, my first question was: which of our instruments does the testing company use? Of course, we were pretty thrilled that one of our gas chromatography systems was used in the analysis.

Solid-Phase Extraction Cartridges with Polymeric Phases Now Available

chromatography sample preparation

Here, I am pleased to present a recently released line of polymer-based solid-phase extraction cartridges (Thermo Scientific Dionex SolEx Polymer-Based SPE cartridges) for the extraction of organic contaminants from liquid matrices. These cartridges are intended to be used for sample preparation using our solid-phase extraction (SPE) system (Thermo Scientific Dionex AutoTrace 280 SPE system) followed by GC, GC-MS or LC-MS analysis.

Gas Chromatography On-Demand Webinars for Pesticide Analysis

gc-ms pesticide residue analysis

Pesticides have been in my news radar lately with a couple of recent stories that caught my attention: in the first one, Canada has initiated special reviews on 23 pesticide active ingredients (link to story) and, in the second one, the U.S. EPA has awarded three universities USD500,000 for studies on reducing pesticide including risk to bees (link to story). And, yesterday, I received an email on three on-demand webinars on the use of gas chromatography in pesticide analysis that you can view without registering!

Accelerated Solvent Extraction & GC-MS Pesticide Analysis in Herbal Products

Pesticide Analysis in Herbal Products

Do you know that the herbal products market while huge--USD 62 Billion globally--has been not been regulated or the products tested in a similar manner to pharmaceutical products? Indeed, in a recent study, researchers found that 59% of herbal products tested in the study contained plant species not listed on the labels! (Link to Study).

GC-MS Screening Method for 600 Pesticides in Food Samples!

GC-MS methods for screening pesticides in food

I couldn't resist making the title of this blog post a bit dramatic to draw your attention to the fact that you could could screen for 600 pesticides using the GC-MS method featured in this blog post!

Accelerated Solvent Extraction Applied in Sediment Toxicity Research

pyrethroid sample preparationResearching the pesticide and the aquatic organism featured in the research study presented in this blog led to read some fascinating information on my part. Firstly, did you know that Hyalella azteca, a freshwater crustacean, is used in sediment toxicity studies and in gene expression studies in ecotoxicogenomics in the United States? (Link and source Wiki on arthopodgenomes). Secondly, pyrethroid pesticides, a focus of the research study, were developed as a synthetic version of the naturally-occurring pesticide pyrethrin, which is found in chrysanthemums.

The stunning photo of the H. azteca featured in this post is from the USDA ARS Public Domain.

In the study, researchers from the University of California, Berkeley, 10 populations of H. azteca were studied for neurotoxicity to pyrethroids via gene analysis. The study is titled, Multiple origins of pyrethroid insecticide resistance across the species complex of a nontarget aquatic crustacean, Hyalella azteca, (link to abstract; only the abstract is free) uses one of our Accelerated Solvent Extraction systems (Thermo Scientific Dionex ASE 200 Accelerated Solvent Extractor system) for preparing the sediment samples as per the requirements of U.S. EPA Method 3510C (downloadable PDF) for the extraction of organic compounds from aqueous samples followed by  gas chromatography analysis. Gene sequencing and gene expression analysis revealed the development of genetic resistance of H. azteca to the pesticide.

The scientists conclude: "The finding that a nontarget aquatic species has acquired resistance to pesticides used only on terrestrial pests is troubling evidence of the impact of chronic pesticide transport from land-based applications into aquatic systems."

The study was jointly conducted by researchers from the following U.S. universities: University of California at Berkeley, University of Massachusetts,  University of Oklahoma, Southern Illinois University, Purdue University, and Indiana University.

You can also downloadable this PDF showing a fast HPLC separation of nine pyrethrin isomers in less than 28 mins using one of our reversed-phase HPLC columns (Acclaim RSLC 120 C18 2.2 ┬Ám column).

Do check out the blog for more chromatography applications and research articles featuring the use of accelerated solvent extraction for sample preparation.


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