At CRS, we have a wide range of options to purify your laboratory gases. We understand it can be overwhelming to narrow down which is the right one for your application. Never fear, we are always available for technical support and with the right information, we can help make the best recommendation for you. We typically have a set of questions to help us narrow down the options. The purity level of your source gas, and your flow and pressure ratings can drastically affect how long any given filter will last for your specific application.

Chromatography Research Supplies (CRS) has developed a moisture filter specifically targeted to SFC end-users in petrochemical analysis using carbon dioxide as their mobile phase. In this specific application, the adsorption properties of the typical 5A or 13X molecular sieve media can cause rapid heating of the purifier cylinders from CO2 adsorption as well as the intended H2O molecules. With the CRS 3A molecular sieve filter, the smaller pore size allows for the removal of moisture while excluding almost all larger molecules, including the CO2 being used as the carrier.

We often get questions asking for lifetime estimates on filters. While we make our specifications conservative to try and get 1 year of life out of each filter from an "average" application; the truth is, this estimate can vary drastically based on the conditions of your application. To get a true estimate we have to collect some data pieces from you first! With our new form, you can easily gather the information needed and input it into the form. You are guaranteed to hear back from one of our team members by the next business day. Check it out...

A nerve-wracking question GC analysts might have asked themselves at some point is, “Will my septum last through the entire weekend autosampler run?” In this blog we’ll look at some of the factors that help answer that question, but starting with, what is injection life anyway? The simple answer is that septum life is the number of injections you can get out of a septum before you notice any degradation of your analytical results. I word it this way because in modern GCs, if an inlet leak is detected, which occurs depending on the brand at, say, 3 or 4 mL/min, it will shut down the instrument, ending the run but at least keeping un-analyzed samples in their intact vials.

Phthalates provide an almost endless opportunity for fascinating annoyance in the lab...

Our stringent QC testing of every batch of our premium low-bleed septa has led us to develop some pretty unique test methods. Learn More...

Plastic-body traps such as our SPure Line can provide a lower-cost solution for non-GC applications.

The right angle endcap option may make integrating the filter into your instrument quick and simple.

You may want to consider switching to all steel!

At CRS we have several customizable filter options to fit your specific application. We have outlined some common questions in the selection process.