Archive for the ‘SPME’ Category

Paul’s excellent questions on “Liner Selection for HS VOCs”

I had a feeling the blog I posted yesterday was sure to prompt some thought-provoking questions, as some of my peers had already been doing so. So, it came as no surprise that Paul posted the following excellent questions (in black) to which I have responded to in blue. Normally, I would just address all […]

SPME Fundamentals: Liner Selection for HS VOCs

My colleague Linx Waclaski is usually the one doling out excellent liner advice, so bear with me as I take a crack at this liner stuff. Ever since we came out with traditional SPME and the SPME Arrow, a lot of customers have had concerns/questions regarding SPME liner dimensions. The short answer to most of […]

SPME Fundamentals: A Look into Incubation and Extraction Temperatures

Being fairly new to anything comes with some good lessons learned. My recent foray into Solid Phase Microextraction (SPME) has been a lot of fun, but I’d be lying if I said it has not been frustrating, complete with some face-palming moments.     In this series, we are going to take you on a […]

Cannabis Concentrates Part III: A Second Extraction Approach

And we’re back! Previously, we discussed analyzing residual solvents via HS-GC using a gas-tight syringe. If you missed it, be sure to check it out here! Today, we are talking about a sample extraction technique that is less common, but has great capabilities; known as Solid Phase Microextraction (SPME). SPME is a sampling technique consisting […]

SPME Arrow Tip = Less Septa Piercing Force

As we indicated in our response to Hailey, the arrow-shaped tip on a SPME Arrow facilitates the smooth penetration of vial and GC septa. We even demonstrated how well GC septa stand up to repeated Arrow injections. However, the following video clearly demonstrates how the Arrow tip enables end users to pierce a vial septum […]

SPME Arrow Sensitivity = Speed

We have demonstrated that the SPME Arrow is more durable and sensitive than a traditional SPME fiber. What more could you ask for? Well, truth be told that some analysts are content with the durability of their traditional SPME fibers. It is just like any other unhealthy relationship, where they have no clue how good […]

SPME Arrow Size = Sensitivity

By now you should know what a SPME Arrow is and that you should be using a SPME Arrow instead of a traditional SPME fiber, because the Arrow is more durable. The same physical dimensions, which make an Arrow more mechanically robust, also afford an increase in sensitivity. Last time, you saw that the phase […]

SPME Arrow Robustness = Confidence

When you see an analytical chemist confidently swagger through the laboratory, you cannot help but ask yourself “is he/she using SPME Arrows?” You say this now, because you know that the SPME Arrow bolsters copious amounts of confidence, which all stems from the increased mechanical robustness and phase volumes, over traditional SPME fibers that is. […]

Does that SPME Arrow come with a free lunch?

Here at Restek our company has a core value referred to as “In the Light.” For me, I like to think of it as no skeletons in the closet. So, time for me to shine a little light. I already introduced you to the SPME Arrow. I also addressed the SPME Arrow’s larger diameter and […]

Excellent SPME question Hailey!!!

Last time, I told you I hunt for organic compounds with SPME Arrows, as opposed to the traditional SPME fibers, because I greatly appreciate the mechanical robustness and increased phase volumes afforded by the SPME Arrow. That blog has since received the following excellent comment/question from Hailey: The “sheath” part of the Arrow looks to […]