Author Archive

The Rtx-1614 separates MORE halogenated flame retardants than just Polybrominated Diphenyl Ethers (PBDEs)!

Halogenated flame retardants (HFRs) are used in numerous household and office products, including electronics, carpeting and furniture.  Polybrominated diphenyl ethers (PBDEs), a subset of HFRs, have been found to be persistent and bioaccumulative in the environment.  While the main technical mixtures of PBDEs have mostly been phased out of production and use, the concentrations in […]

Analyzing pesticides in herbal tea using QuEChERS and GCxGC-TOFMS of course!

Herbal tea, a non-caffeinated drink made from plants, herbs, or spices has been used throughout history for its potential medicinal benefit.   Various herbal material is mixed depending on the desired medicinal or flavor properties for the tea.   As with any plant based commodity, there is the potential for pesticide residues to remain in the final […]

From Glass to Fused Silica in Corning, NY, USA

I almost hate to admit it, but oftentimes when I am enjoying a vacation, I can’t help but think about chromatography and how it touches so many aspects of life.   Last week I was in Corning, NY and went to the Corning Museum of Glass which has a fantastic display of all facets of glass.  […]

The 33rd International Symposium on Halogenated Persistent Organic Pollutants, Dioxin 2013

The last week of August I attended the POP symposium in the steamy Daegu, Korea.  With over 500 attendees representing 42 countries the technical content was both informative and interesting.  The conference mainly focuses on persistent organic pollutants named in the Stockholm convention.  These include several organochlorine pesticides, polychlorinated dibenzo-p-dioxins (PCDD), polychlorinated dibenzofurans (PCDF), polychlorinated […]

Do you measure the length of your GC column?

When purchasing a GC column the length that you buy isn’t necessarily the exact length that you get.  In fact, it is typical that you will receive 0.5 to 1.0 meter more than what you bought!  Knowing the exact length of your column and inputting the correct value into the GC instrument software is important […]

Testing for pesticides in tobacco… QuEChERS makes it easy!!

Whenever it is time to analyze pesticides in complex matrices I always hope that we can use the QuEChERS sample preparation approach and not something more laborious!  The Quick-Easy-Cheap-Effective-Rugged-Safe method was developed for multiresidue pesticides in fruits and vegetables, however we have been using this approach outside of the typical fruit and vegetable matrices with […]

This isn’t your average CSI, the International Network of Environmental Forensics (INEF)

Next week (June 10-12) at the Pennsylvania State University (PSU) the International Network of Environmental Forensics conference is being held.  This isn’t your typical crime scene investigation but, as defined by the INEF, “environmental forensics is the use of scientific techniques to identify the source, age, and timing of a contaminant into the environment.”  We […]

Mining through complex data and non-target analysis is made easier with GCxGC-TOFMS

I am currently working on a project looking for pesticides in herbal tea.  At this point, I am using the contents of one tea bag (~1.5g) and 10mL of freshly boiled water with a QuEChERS extraction.  I am still working through the details on the impact of the hot water and what type of cleanup […]

Half the Column, Same Chromatogram. Trimming your GC Column and Maintaining Resolution.

Oftentimes, when dealing with complex matrices that have a lot of non-volatile material, you may need to trim the front end of your column to prolong the column lifetime.  I was recently working on a project where I wanted to see how short of a column I could use and still maintain resolution between some […]

GCxGC is the Star at 4th Multidimensional Chromatography Workshop!

My colleagues and I made the road trip to the Ontario Ministry of the Environment in Toronto for the 4th Multidimensional Chromatography Workshop.  This workshop organized by Eric Reiner at the MOE is a veritable who’s who in the world of GCxGC.  I personally love going to this workshop because of the wide variety of […]