The battle of the headspace Titans continues in the Teledyne Tekmar applications lab. This time, the sample arena has moved to environmental compounds in beverages. Beverages formulated with sodium or potassium benzoate and ascorbic acid may form benzene at part per billion levels (ppb). The lowest current regulation found in the international water regulations for benzene is 1 ppb.
Tekmar Talk Blog
Over the past few months, Ab Sciex hosted a technical talk with invited guest from Teledyne Tekmar, Phenomenex, and Gerstel on driving innovation, “Better Ideas for the Modern Food and Environmental Testing Laboratory”. The goal of this workshop was to show that collectively these companies could create a total solution for food and environmental laboratory testing. It, also, served as a forum to talk about pertinent issues and challenges in regards to food testing. Teledyne Tekmar was privileged to introduce the new AutoMate-Q40 a revolutionary system specifically designed and optimized to automate the QuEChERS sample preparation workflow. The AutoMate-Q40 system automates the following sampler preparation functions:
Excitement abounds in the Teledyne Tekmar labs as the Versa headspace autosampler continues to meet the challenges of an ever-changing environmental science world. Its big brother, the HT3, started this excitement when it successfully met the challenge to detect low levels of 1,4-dioxane, bromoform, acrylonitrile and vinyl chloride in water following new environmental guidance from Korea and the Asian market.
The US EPA hosted a technical workshop on analytical chemical methods for hydraulic fracturing on February 25th in Research Triangle Park, NC. The goal of these workshops is to gather together stakeholders, technical experts, and EPA representatives to get updates on the progress of the EPA’s testing with regards to hydraulic fracturing. It also serves as a forum to discuss best testing practices and methodologies for this area. Teledyne Tekmar was privileged to participate as a speaker and participant in the round table panel discussions that coincided with the workshop.
Tags: VOC, Teledyne Tekmar, Sample Preparation, Volatile Organic Compounds, drinking water, chromatography, Hydraulic Fracturing, Fracking, Analytical Instrumentation, Concentrator, Autosampler, Analyzer
Automated sample preparation is built upon making instruments easier to use, faster, and more efficient. More recent features to purge and trap systems like mass flow controllers and variable volume standard addition, give more method flexibility than legacy products. The 27 mL syringe on our Atomx VOC sample prep system allows for dilution of high level samples as well as automated methanol extractions.
You have successfully installed your TOC analyzer and, as suggested, you run a “Leak Check” prior to starting your analysis. The leak check fails, so you tighten everything, perform another leak check, and still, the instrument does not pass. Without a plan of attack, this can be frustrating and time consuming. Fortunately, there are some troubleshooting techniques that can help.
Troubleshooting analytical instrumentation can be a cumbersome process. If we remember a few rules, the task can be simplified. First, take a moment to review the manuals for the instrumentation. Second, examine the facts and use valid reasoning to identify the root cause of the problem. Concentrate on anything that may have changed, like a column, trap, etc. Avoid “quick fixes” as they may cause more problems down the road. The most important thing is to be patient.
With helium increasing in scarcity and price, many laboratories are looking for cheaper and more readily available alternatives. Some have also been restricted or cut off completely from their suppliers due to the demand. In the realm of gas chromatography, this leaves hydrogen and nitrogen as the most viable alternatives for carrier gas. Gas generators are available from a variety of vendors for both hydrogen and nitrogen. Installation of one of these generators can lead to considerable cost savings over its lifetime, especially when changing from helium gas cylinders. New methods are also starting to allow alternative gases to accommodate these supply challenges.
Last week, Tekmar presented a poster at the National Environmental Monitoring Conference (NEMC 2012) on dissolved gas analysis in drinking water. Along with the poster sessions, there were also meetings and sessions on a variety of environmental topics. All of the talks were well attended, especially the session devoted to issues surrounding hydraulic fracturing. One issue that was discussed extensively, and that we continue to see, is light hydrocarbon testing and methane migration.