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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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Solid-Phase Extraction: Complete Recovery of Hormones in Water

sample preparation hormones in drinking water

Did you know that the presence of hormones (from both natural and artificial sources) in drinking water is a serious human health concern? This is how they end up in our drinking water supplies: hormones are widely used in pharmaceuticals prescribed to humans and livestock animals, and after consumption, the hormones often end up in the sewage system as a result of excretion and disposal of unwanted quantities of the pharmaceutical drugs. The European Parliament has identified several estrogen variants as priority substances that will be monitored to determine appropriate measures to address the risk posed by these compounds. Several hormones, including estriol, estrone, estradiol, ethynylestradiol, equilin, androstenedione, and testosterone, are routinely monitored as part of the U.S. Environmental Protection Agency (EPA) Unregulated Contaminant Monitoring program (link to webpage). These hormones include estriol, estrone, estradiol, ethynylestradiol, equilin, androstenedione, and testosterone.

Solid-Phase Extraction Speeds Extraction of Surfactants in Wastewater

analysis of surfactants in wastewater

After the last post on the subject of new Solid-Phase Extraction (SPE) cartridges with polymeric phases (link to post), I am pleased to feature a recently developed application for the automated solid-phase extraction of surfactants in wastewater using one of these new cartridges.

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.

Solid Phase Extraction of Explosives in Water: U.S. EPA Method 8330

Explosives in Water as per U.S. EPA Method 8330

In this recently released application note, chemists focused on a topic that has become of increasing concern: leaching of toxic and carcinogenic explosive compounds (nitroaromatics, nitramines, and nitrate esters) from military installations and munitions manufacturers into the soil and groundwater. By the way, I had covered this topic with a previous blog post, HPLC: Sensitive Analysis of 14 Explosive Compounds in Water, (link to post), which describes a sensitive HPLC method as per U.S. EPA 8330A.

Solid Phase Extraction: Online Method Selection Tool

spe method selection tool

In this extremely short blog post, I am pleased to share with you our solid-phase extraction tool that quickly identifies the method and product you need for your sample preparation.

GC-MS Forensic Toxicology Research Study (2)

GC-MS analysis of opiates in blood

After the last post on the use of gas chromatography, mass spectrometry, and HPLC in a forensic toxicology study (blog post: GC-FID, LC-MS-MS, & HPLC: Who-Done-It Forensic Toxicology Study (1), I found a similar study and thought it would be of interest to our blog readers.

SPE LC-MS/MS: Analysis of Montelukast in Human Plasma (V)

sample preparation for bioanalysis

Asthma has been in the news recently with a couple of research stories including one in which researchers have linked the exposure in infancy to nitrogen dioxide air pollution with the later development of childhood asthma and another in which the city of Bangalore has been reported as becoming the asthma capital for Indian children as air pollution rockets in the city! Also, did you know that in 2009 alone, asthma was responsible for 250,000 deaths globally?

HPLC Speeds Determination of Paraquat and Diquat in Water

HPLC automated herbicide analysis

We recently released this fast and sensitive HPLC method for the determination of the agricultural herbicides paraquat and diquat in environmental waters that takes less than 10 mins and, in addition, offers the advantages of full automation, the absence of operator influence, time savings, and strict process control!

Solid-Phase Extraction & GC-MS: Acrylamide in Potato Chips (III)

analysis of acrylamide in potato chips

So far, this blog has featured an ion chromatography method for the analysis of acrylamide of several food products (link to post) and an LC-MS method for the analysis of acrylamide in coffee and chocolate  (link to post), and now, I am pleased to present a GC-MS method for the analysis of acrylamide in potato chips.

Automated Solid-Phase Extraction Superior to Traditional Extraction?

Solid-Phase Extraction

The title of this blog post seems like a pretty ambitious claim to make about automated solid-phase extraction (SPE) on the face of it, doesn't it? But, here I am pleased to share a paper, White Paper 70622, Why Automated Solid-Phase Extraction Is Superior to Traditional Extraction, (downloadable PDF), written by a scientist in our Sunnyvale office in California, laying out the arguments in support of the title of the white paper.

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