EO, Guayacol and poly 80 with PTFE?
- Thread starter khurgan
- Start date
btw the answer which bothers the hell out of me that it took this long for someone to answer this dam simple question, cmon guys stop being such pricks, do what you joined the forum for and to do.. take knowledge in and pass it out where you can, and leave the ego's somewhere else other then in the same room as you and your computers lol, YES PTFE will filter all of which this guy has asked for, is the most preferred type of filter to use with our solvents/AAS's yes over PVDF heres a link to a very useful and insightful:
http://www.nationalscientific.com/support/pdf/NS-SyringeFilterMembraneComp-Chart.pdf
http://www.nationalscientific.com/support/pdf/NS-SyringeFilterMembraneComp-Chart.pdf
Can an you clarify this..
Powderguy
MuscleChemistry Registered Member
Yes, when filtering EO, Guayacol and poly 80 with PTFE the Raw will not be filly dissolved because you are using no solvents for saturation. This mix will almost always cause a suspension. Now some may dissolve and I have heard of heating to do this but if its to hot it will dissolve your membrane.
Now with the above mix lets say in winny you will need to add more raw as the filter will catch some of the raw so go over by 20% to make up for what is caught in the filter. When using solvents I go over by 10% anyways, as some will always be caught in the filter even if your solution is completely clear.
Hope this helps
Now with the above mix lets say in winny you will need to add more raw as the filter will catch some of the raw so go over by 20% to make up for what is caught in the filter. When using solvents I go over by 10% anyways, as some will always be caught in the filter even if your solution is completely clear.
Hope this helps
Right, thank you.. I was asking for clarification on which type of filter since two were being compared/mentioned... I've almost always been able to get whatever powder to fully dissolve in just EO when adding heat, now getting it to not crash as it cools (whth certain raws such as Test base for example) without BA/BB is another story...and millipore PVDF have never failed me either.... Good topic....
I wish I'd logged on before now- could have resolved this quickly. PTFE is *teflon* (not the non-stick coating the actual polymer) it is chemically resistant to just about *everything*, and as such is probably the *best* and usually most expensive choice for membrane filters. There is no risk that an PTFE filter will dissolve into the solvent used for an injectable. (*Maybe* in liquid Chlorine Trifluoride...but you wouldn't want to be within 100 meters of that...). PVDF, by the way, is a very similar related compound, very chemical resistant, bit less expensive - again, anything you're likely to inject, PVDF will be inert to as well.
Doctor9
Doctor9
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