Archive for the ‘PAH Analysis’ Category

Upcoming revisions to three wastewater methods reviewed at NEMC 2017

Monday morning, representatives from the EPA’s wastewater office reviewed the significant changes for the three major GC wastewater methods: 608.3, 624.1, and 625.1. The overarching goals were to modernize the methods and bring the language and QC requirements in line with the methods from the drinking water and hazardous waste offices. The methods have been […]

International Network of Environmental Forensics Conference in Örebro, Sweden

From the INEF website:  “The International Network of Environmental Forensics (INEF) was founded in 2008 to provide a forum for scientists, environmental consultants, regulators and lawyers to share information regarding the use of environmental forensics.  Environmental forensics is the use of scientific techniques to identify and apportion the source(s), age and timing of a contaminant […]

EPRW: European Pesticides Residue Workshop in Sunny Cyprus

                                    Just wanted to let everyone know that we have published our presentations we presented at EPRW (European Pesticide Residue Workshop) last month in Limassol, Cyprus. It was a great meeting in a beautiful location. It was a pleasure to […]

Don’t Forget to Change Your GC Inlet Bottom Seal and Trim Your GC Column as Part of Your Maintenance Routine!

While doing PAH analysis for dirty samples with splitless GC I saw increased peak tailing and loss of response, so I did what anybody would do: changed my GC inlet liner.  In this case I used a Restek Premium single taper inlet liner with wool.  Unfortunately when I did my next standard analysis, not much was improved.  […]

Fast Analysis of PAHs using Split Injection and a Short GC Column

Click on the this link:  Fast Analysis of PAHs  to see how I analyzed the EPA 16 polycyclic aromatic hydrocarbons (PAHs) in under 10 min using GC-MS by employing split injection with a Restek Premium Precision split liner with wool and a 15m x 0.25mm x 0.25µm Rxi-5Sil MS GC column.  Split injection allows a higher GC oven […]

Shoot-and-Dilute GC – Practical GC – The Column

Check out my recently published articles in LCGC – The Column on Shoot-and-Dilute GC (split injection GC), where I outline the benefits of this technique through recently collected experimental data in my lab at Restek.  I’m two articles into my Practical GC series, with another one soon to be published.  This is a continuation of other split injection work […]

A quick evaluation of some disadvantages to performing semivolatiles analysis by EPA Method 8270D with splitless injection

This blog is part of a series; the previous installment can be found here. Semivolatile calibrations on the 30 m x 0.25 mm ID x 0.25 µm df column format often range from 1.0 to over 100 ng/µL; however, a 0.25 mm ID column usually experiences peak overload as the mass on column approaches 10 […]

Ernst Bayer Award to Junior Scientist Marco Nestola

The Working Group “Separation Science” as part of the German Chemical Society (GDCh) tenders the Ernst Bayer award for an outstanding publication in the field of analytical separation techniques to young scientists. The 2015 award winner, Marco Nestola, received the prize personally during the 26th PhD-Conference, realized by the WG Separation Science from 10th to […]

7th International Symposium on Recent Advances in Food Analysis (RAFA)

The 7th International Symposium on Recent Advances in Food Analysis, better known in short as RAFA, starts this week in Prague, The Czech Republic.  This is my tenth anniversary for this biennial meeting, where the organizer, Jana Hajšlová, invited me to give the lecture, Using the QuEChERS Sample Preparation Method and GCxGC-TOFMS to Determine Pesticides […]

High Source Temperatures and Meeting EPA Tuning Criteria

My first blog here at Restek was a demonstration of how increasing the source temperature could improve the raw response of 2,4-dinitrophenol while maintaining the relative response. Four years later I’m here with the promised follow-up on the elevated source temperature effects on tune evaluations (and making adjustments via target tuning). This blog is going to deal […]