Archive for the ‘Miscellaneous’ Category

Can I use a MS column for non-mass spec applications?

Many of you may have read my response in the Restek Advantage, where I was questioned about the “MS” designation on some Restek GC columns.  I explained how the MS suffix is for a mass spec grade column.  These MS designated columns are tested and guaranteed for low bleed performance, which is ideal for sensitive […]

Electronic Cigarettes Part VIII: Vapor Analysis – Why we chose multi-sorbent thermal desorption for analyzing VOCs like acetaldehyde

In the last installment of this blog series we let you know that we were utilizing triple-sorbent thermal desorption (TD) tubes to collect electronic cigarette vapor. However, we did not tell you why, but obviously I am going to do so right now. As you may already know, Restek dabbles in the field of whole […]

Need help finding the correct ferrule to install your GC column? Part 5: Shimadzu GCs

You’re ready to install a column into your GC and realize you do not have the correct ferrules. Which ferrule do you choose?  The parameters to consider when choosing the correct ferrule are instrument make and model, nut size and type, ferrule material, and column ID.  A visit to our ferrules home page will provide […]

Need help finding the correct ferrule to install your GC column? Part 4: Thermo Scientific GCs

You’re ready to install a column into your GC and realize you do not have the correct ferrules. Which ferrule do you choose?  The parameters to consider when choosing the correct ferrule are instrument make and model, nut size and type, ferrule material, and column ID.  A visit to our ferrules home page will provide […]

Drug Screening can be a Big Pain

I have the privilege of working with a number of talented people here at Restek and when I approached Sharon Lupo about a project last year known affectionately as “The Big Pain” I wasn’t sure how successful she could be. Think about it: Opioids, Barbiturates, Anti-Depressants, Anti-Epileptics, Hallucinogens, etc. all have vastly different chemical make-ups.  […]

Electronic Cigarettes Part VII: Vapor Analysis – How we sampled for VOCs like formaldehyde

If you have been following this blog series, then you already know that we found numerous (upwards of 64) compounds in electronic cigarette solutions. You also know that we found even more (approximately 82) compounds in e-cigarette vapor. More importantly, you know not to waste your time testing the e-juice, because the vaporization process found […]

Need help finding the correct ferrule to install your GC column? Part 3: Perkin Elmer GCs

Need help finding a ferrule to install your column? Part 3: Perkin Elmer GCs You’re ready to install a column into your GC and realize you do not have ferrules to do the job. Which ferrule do you choose?  The parameters to consider when choosing the correct ferrule are instrument make and model, nut size […]

Easy Peasy: Optimized LC-QTRAP Method for Pesticide Residues

Despite what is sometimes advertised, setting up optimized methods for multiresidue pesticide analysis is typically not “easy peasy” and can be quite time consuming. Luckily, some colleagues are willing to share their method with us. Thank you Kelli, James, and Jon!* The downloadable spreadsheet contains retention times, transitions, ionization and collision parameters for our LC […]

Need help finding the correct Ferrule to install your GC Column? Part 2: Bruker/Varian GCs

You’re ready to install a column into your GC and realize you do not have ferrules to do the job. Which ferrule do you choose?  The parameters to consider when choosing the correct ferrule are instrument make and model, nut size and type, ferrule material, and column ID.  A visit to our ferrules home page […]

GC columns – when one is not enough

Often we get asked for a column recommendation for a complex GC analysis.   This is especially true for gas analysis.  Probably the most common request is for separation of fixed (permanent) gases (like O2, N2, CO, CO2, N2O, etc…) plus separation of larger (higher-boiling point) compounds (light hydrocarbons, moisture, sulfur compounds, etc.).  Unfortunately, there is […]