Chromatography Forum

I am new to twister and the whole gerstel unit and have started at a new position and will be setting up waters for pesticides and semi-volatiles by twister. Does anyone have experience with these methods that can point me in the direction for some troubleshooting or information. I would love to link with some people to brainstorm.

I remember seeing these several years ago at Pittcon, but never got to play with them. It is more or less SPME just the adsorbent is coated on a stir bar instead of a fiber.

Will you be solvent extracting the stir bar or using thermal desorption?

Using thermal desorption after first conditioning the stir bar in solvent and then "extracting the sample". It sounds great, I will be playing with it this week.

Hi-

I just joined the forum and saw your post about Twister from earlier this summer.
How did the Twister extractions of pesticides work out? We have done a lot of work in this area if you are still working with Twister extractions....

Hi they worked well, I had some instrumentation issues which seem to be sorted out now, but I had really good recoveries and very low RL's