Bill Nye
Posts: 289 Joined: 04-Aug-2010 Last visit: 08-Oct-2018 Location: the lab
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So I finally got around to ordering a separatory funnel and stand off of ebay. I have heard from several people that PTFE stopcocks are superior to ground glass as they don't stick and don't require lubricant, so thats what I got. My question is this; will the high pH from basification or solvents such as xylene have negative effects on the PTFE? I have been doing mescaline extractions and need it for after gassing out the HCl but also i want to start doing A/B's on my cactus to get the cleaner product. Has anyone had any problems from use of high pH or xylene with their PTFE stopcock? "Then he looked right through me
With somniferous almond eyes
Don't even know what that means
Must remember to write it down,
This is so real
Like the time Dave floated away
See my heart is pounding
'Cause this **** never happens to me!"
Tool - Rosetta Stoned
ANYTHING I POST ONLY TOOK PLACE IN REALMS OF PURE IDEA AND THOUGHT, ANY PICTURES I POST ARE STRAIGHT FROM GOOGLE IMAGES. ANY AND ALL PROCESSES I CLAIM TO CARRY OUT HAVE NOT ACTUALLY OCCURRED IN PHYSICAL REALITY, AND THEREFORE VIOLATE NO PHYSICAL LAW. WHEN SUCH THINGS ARE BANNED FROM THOUGHT I WILL CEASE TO CARRY THEM OUT EVEN IN THE ETHER.
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DMT-Nexus member
Posts: 191 Joined: 09-Sep-2010 Last visit: 09-Jun-2014
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I have used both GG and PTFE stopcocks and have never had problems with either including the use of strong solvents and HCL gassing. I could be wrong but as far as I know PTFE is unreactive with anything you'd use in a lab.
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Bill Nye
Posts: 289 Joined: 04-Aug-2010 Last visit: 08-Oct-2018 Location: the lab
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I figured as much seeing as how its made for lab work but PTFE is just teflon correct? I have heard of lye f'n up teflon pots "Then he looked right through me
With somniferous almond eyes
Don't even know what that means
Must remember to write it down,
This is so real
Like the time Dave floated away
See my heart is pounding
'Cause this **** never happens to me!"
Tool - Rosetta Stoned
ANYTHING I POST ONLY TOOK PLACE IN REALMS OF PURE IDEA AND THOUGHT, ANY PICTURES I POST ARE STRAIGHT FROM GOOGLE IMAGES. ANY AND ALL PROCESSES I CLAIM TO CARRY OUT HAVE NOT ACTUALLY OCCURRED IN PHYSICAL REALITY, AND THEREFORE VIOLATE NO PHYSICAL LAW. WHEN SUCH THINGS ARE BANNED FROM THOUGHT I WILL CEASE TO CARRY THEM OUT EVEN IN THE ETHER.
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Kalt und Heiß, Schwarz und Rot, Kürper und Geist, Liebe und Chaos
 
Posts: 4661 Joined: 02-Jun-2008 Last visit: 30-Apr-2022
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fraterS.O.L. wrote:I figured as much seeing as how its made for lab work but PTFE is just teflon correct? I have heard of lye f'n up teflon pots Have you heard of lye fuckign up the teflon itself on the pots or it just detaches it from the pots? Sticking teflon to pots/pans/utensils etc is not an easy process and involves special adhesives, maybe that's what lye attacks and causes teflon coating to appear fucked up in the stories you've heard. Need to calculate between salts and freebases? Click here! Need to calculate freebase or salt percentage at a given pH? Click here!
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analytical chemist
 
Posts: 7463 Joined: 21-May-2008 Last visit: 14-Jan-2025 Location: the lab
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lye does nothing to solid teflon parts, and teflon is impervious to most solvents. "Nothing is true, everything is permitted." ~ hassan i sabbah
"Experiments are the only means of attaining knowledge at our disposal. The rest is poetry, imagination." -Max Planck
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Bill Nye
Posts: 289 Joined: 04-Aug-2010 Last visit: 08-Oct-2018 Location: the lab
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That makes sense as thats exactly what it said. It was on yahoo answers or something and people were asking how to get the teflon off of the pots. Thanks all. Is $90 total a decent deal for the unnel and stand? I got the funnel from united scientific on ebay for $60ish and the stand for $20 and $11 for shipping "Then he looked right through me
With somniferous almond eyes
Don't even know what that means
Must remember to write it down,
This is so real
Like the time Dave floated away
See my heart is pounding
'Cause this **** never happens to me!"
Tool - Rosetta Stoned
ANYTHING I POST ONLY TOOK PLACE IN REALMS OF PURE IDEA AND THOUGHT, ANY PICTURES I POST ARE STRAIGHT FROM GOOGLE IMAGES. ANY AND ALL PROCESSES I CLAIM TO CARRY OUT HAVE NOT ACTUALLY OCCURRED IN PHYSICAL REALITY, AND THEREFORE VIOLATE NO PHYSICAL LAW. WHEN SUCH THINGS ARE BANNED FROM THOUGHT I WILL CEASE TO CARRY THEM OUT EVEN IN THE ETHER.
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DMT-Nexus member
Posts: 291 Joined: 27-Nov-2008 Last visit: 31-May-2011 Location: here and now
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can someone point me in the right direction of an ebay sale or a link for a good sep funnel? I've always wanted one but am not sure where to start. thnx!
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Bill Nye
Posts: 289 Joined: 04-Aug-2010 Last visit: 08-Oct-2018 Location: the lab
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www.onlinesciencemall.com"Then he looked right through me
With somniferous almond eyes
Don't even know what that means
Must remember to write it down,
This is so real
Like the time Dave floated away
See my heart is pounding
'Cause this **** never happens to me!"
Tool - Rosetta Stoned
ANYTHING I POST ONLY TOOK PLACE IN REALMS OF PURE IDEA AND THOUGHT, ANY PICTURES I POST ARE STRAIGHT FROM GOOGLE IMAGES. ANY AND ALL PROCESSES I CLAIM TO CARRY OUT HAVE NOT ACTUALLY OCCURRED IN PHYSICAL REALITY, AND THEREFORE VIOLATE NO PHYSICAL LAW. WHEN SUCH THINGS ARE BANNED FROM THOUGHT I WILL CEASE TO CARRY THEM OUT EVEN IN THE ETHER.
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