Posts Tagged ‘cannabis’

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 […]

What’s in a name? A C18 by any other name would not be the ARC-18

You have probably read or been told numerous times and in numerous ways that not all C18 columns are the same. And that is very true. Particle morphology, bonding chemistry, and add-ons like end capping all influence the retention and selectivity of this workhorse LC phase. At Restek we have an interesting C18 phase that […]

Cannabis Concentrates Part I: Introduction to Residual Solvents

Greetings, everyone! My name is Colton Myers and I’m the new kid on the block at Restek…kinda. You may have seen my name before in Jason Herrington’s E-Cig blogs, but that’s from when I was an intern at Restek. Now, I have the opportunity to work in our Innovations lab at Restek and do some […]

Can HPLC-UV Be Used For Terpenes Analysis In Cannabis?

While HPLC may be tempting to use for terpenes analysis, a GC/FID or GC/MS is really the most straightforward and recommended way of analyzing terpenes in cannabis. Terpenes, being relatively volatile and neutral, lend themselves rather nicely to GC in general. As you can see from Figure 1 below, coelutions of the cannabinoids and terpenes are very likely when […]

Pesticide analysis for cannabis flower: method and data overview

Pesticides in cannabis has been a hot topic lately and we have been getting many requests for help with this analysis. We did work on pesticide residue testing in cannabis about 6 years ago. At that time, we were limited to testing our methods with a small amount of seized material. Recently, we have been […]