gerstel twister for pesticides and semi-volatiles

[chloesabrina]

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.

[James_Ball]

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?

[chloesabrina]

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.

[edhplc]

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....

[chloesabrina]

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