Common Mistakes by the Lab Series: The Pain of Contaminated Squeeze Bottles

Ugh…I think we can all agree that the worst thing that can happen when testing high profile samples is losing an extract due to phthalate contamination.  Whether you are extracting 525.2 or 625.1 samples, phthalates can ruin your day and wreak great havoc, causing false positives!  We wonder where they all come from and how they got in the extract in the first place because we try our best to make sure our lab supplies and instruments are clean.  As we all know though…phthalates are literally everywhere floating around in the air and settling on surfaces.  However, I am here to talk about one place in particular: solvent squeeze bottles.  We take extra precautions when refilling our squeeze bottles, but there is always the potential of introducing phthalates into them if they are not refilled or used properly.

Continue reading Common Mistakes by the Lab Series: The Pain of Contaminated Squeeze Bottles

How does your sample prep change for LC/MS vs GC/MS

When preparing your extracts for analysis, it is important to know which instrument to use and why you should be using that specific one.  Of course, we know that each EPA method dictates which analysis instrument must be used within each method, however, we will be determining why that option was chosen in the first place in this blog post! Continue reading How does your sample prep change for LC/MS vs GC/MS