Author Archive

Column and reference standards documentation – one click away

Did you know that many forms of documentation, such as column and standard CofAs, are available one click away  from our homepage? From here, pdfs of safety data sheets (SDSs), certificates of analysis (CofAs) for LC columns and GC guard columns, CofAs and datapacks for reference standards, and more, can be accessed. Our website contains […]

Troubleshooting 101

Like most folks who work in the lab, you likely have had some downtime in the lab due to various reasons, like a column, instrument, sample prep, standards, and even application or method conditions. Troubleshooting then commences. Details are often needed, in order to get the bigger picture. One of the most important troubleshooting tools […]

Want to know how to properly choose a column – please step inside

Often times in technical service there will be a request for a column that can provide a certain separation on a lone pair of analytes.  Take for example, the separation of CO from CH4 from one another. This separation is very easily done on any porous polymer column. What is sometimes not taken into account […]

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 […]

HPLC columns for the European Pharmacopoeia methods

td.stripe {border-bottom: 1px solid #666;padding: 3px;} European Pharmacopoeia (EU) methods tend to be vague in their description for column requirements, which can make choosing the correct column a little tricky.   To simply things, I listed the Restek HPLC columns that best match the columns (phases) listed in the European Pharmacopoeia “Reagents” chapter. Hopefully this […]

QuonFuseD by QuEChERS?

Currently the big push for sample prep is using QuEChERS, which stands for “Quick, Easy, Cheap, Effective, Rugged, and Safe”. It is a much more streamlined method, when compared to traditional liquid/liquid extractions and even SPE. Pesticide residues in various matrices are often analyzed by QuEChERS methodology, and today it is probably the most often […]