Restek Corporation articles

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 if there are any associated issues of septa coring. Today I reveal how much lunch costs.

As Hailey pointed out last time, the SPME Arrow has a larger

I’ve started receiving a number of questions about the large volume injection technique called Concurrent Solvent Recondensation – Large Volume Sample Injection. Most recently, a question came through the Tech Service group about injection volume variation. I had encountered a similar problem when working on the 50 µL injection for the combined 1,4-Dioxane and Nitrosamines (EPA methods 522 and 521) application note (

Clogging and over pressuring are definitely problematic for Liquid Chromatography columns. Back in 2005 John Dolan’s sage advice to chromatographers to make an LC column last forever was simple, “Never open the box!” As John pointed out, this is not practical and I have to agree. But as an LC column manufacturer I have seen remarks from customers regarding clogging as though it was it was a flaw in the column. Unfortunately, there is not really anything that we do when we ma

Restek manufactures several different residual solvent standards.  These can be used for testing according to USP, the EP monograph, or other residual solvent assays, such as medical cannabis testing.   The calculations involved for the use of these standards has led to questions for our technical team.  This post should help provide guidance for their usage.  I’ll use USPin my example calculations, but they can be applied to other methodology.

Since USP

I recently posted a Blog regarding some notes about Fats and Oils, FAMES and our Famewax column, which can be found here. In Food Industry the challenge may be a bit heavier, if the amount of Trans Fatty Acids is requested.

If you are an avid chromatographer you likely subscribe to LC/GC magazine or its popular electronic version, E-Separation Solutions. It is definitely the place to go for news and information related to all things Chromatography. Over the years Restek has had many an article published in LC/GC and, full disclosure, we advertise there as well. Who in the business doesn’t? It is the place to be seen.

Back in June a couple of Restek’s LC R&D scientists had an article

 They may be called PFP, PFPP, pentafluorophenyl, fluorophenyl or F5 phases. What they all have in common is the structure shown above (the pentafluorophenyl  group) attached to the silica particles.

We already learned how to calibrate our TO-15 system, what our concentration units mean, and how to properly read our vacuum gauge while pressurizing samples. We are clearly going out of order here, because I have never covered how to prepare a working standard (necessary for calibrations) from a stock standard. Therefore, the following multi-part blog seri

You may have seen my last blog post about guard holders and cartridges that we have available for our various LC product lines, “Which guard cartridges and holders go with which LC analytical columns?”

Along those lines of discussion, the following note is available to also show what specific products are currently offered for this: http://www.restek.com/pdfs/GNAR2492-UNV.pd

In Europe, the last transition periods named in REGULATION (EU) No 1169/2011 on the provision of food information to consumers are running out on Dec. 13th, 2016. Since then, a nutrition declaration is mandatory for nearly all packed food in Europe, wherein the amounts of fat, saturates, carbohydrate, sugars, protein and salt have to be included. The content of the mandatory nutrition declaration may be supplemented with an indi­cation of the amounts of one or more of the following:<