PFAS分析に必須のディレイカラムの重要性と効果
Sometimes I hear this from customers: I don’t need a delay column. I haven’t had any trouble without it so far.” It might be true. You may not have any issues without the delay column, especially when your samples are,…
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Annual Replacement of Cartridge Gas Filters
A significant number of instrument and column complaints are carrier gas related, which could be caused by breakthrough from filters that are not replaced in time. The possible consequences of a filter breakthrough are: Gas distribution system behind the filter…
Is it OK to use THF (tetrahydrofuran) on my HPLC?
Well, it might be. In the early days of HPLC, THF was commonly used as a mobile phase solvent. It has eluting strength similar to acetonitrile, but just slightly stronger. Since it technically is an ether and is very miscible…
QuEChERS – Where to start?
Enjoy the tip!*I am often asked for QuEChERS product recommendations. Usually the request is something like, “I need to test pesticides in _____” and that blank can be just about anything…sometimes not even food. Unless it is something I have…
Are your ghost peaks coming from the GC column, or something else?
This is a common GC troubleshooting question. Since determining the source of the ghost (contamination) peaks can be difficult, I decided to write this post to (hopefully) help our customers. . GC column carryover When I operated an instrument…
Troubleshooting GC Syringe Issues
I think we all have experienced various syringe issues at one time or another, and of course, problems seem to occur at the worst times. Hopefully this post will help you quickly correct two of the most common issues we…
I need a fitting, but which one?
We (tech service) get calls all the time about fittings, especially the ones we sell which are manufactured by Swagelok and Valco. It seems like customers are either very familiar with fittings, or they know virtually nothing about them….
