Yesterday marked the end of yet another great GPC school in Houston. It was the third one of its kind that we have hosted in our main Viscotek office in 2013, and I hope it was of value to all the attendees.
The mild Texas climate makes our southern office especially popular for these events at this time of the year. And this week was certainly no exception. With our conference room booked almost to capacity, it is great to see that many customers were able to take advantage of the in-person classroom training.


Both Kyle Williams and Mark Pothecary did an outstanding teaching job, and I’d like to also thank Greg Stone, Matt McGann and John Erne for their support and involvement in the event.

The curriculum encompassed details on Conventional Calibration , where a simple concentration detector, like refractive index (RI) or ultraviolet absorption (UV), is used to find the relative abundance of molecular weight components according to their contribution in each chromatogram slice, and compared to a series of standards eluting over the applicable range of the experimental system.


The advantage of the multi-detector (“triple detection“) method is that only one standard is needed and that’s it. Here, the absolute light scattering signal in conjunction with the concentration detector is used to determine the absolute molecular weight at each chromatogram slice. For that the real concentration is needed, so knowledge of either the refractive index increment dn/dc or the specific absorptivity dA/dc is necessary.

Aside from the lecture component, hands-on software exercises and laboratory work formed part of the two-day event.

Below is a group photo taken yesterday – hope everyone had a good time – and safe travels home to everyone!

PS: In an earlier posting about how to get to our office I had mentioned a few hotel choices. There is now also an additional one, the Marriott TownePlace Suites on TX-249, call directly and ask for the Malvern rate.




If you have any questions, please email me at Thanks!