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Author: Subject: amateur cannula sources?
Funkerman23
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[*] posted on 1-5-2013 at 00:16
amateur cannula sources?


I may catch it this time but I know I can't be the only one having issues. Laboy when they had the old site stocked cannula as well as all the other needed air free parts. Well the new site has cleared up a lot of issues and did away with a lot of multiple listings( as well as a few niche adapters but I digress) but it looks like they no longer stock or sell stainless steel cannulas. The big guys as usual won't sell to us but does anyone out there have a source or know where to get cannulas?



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BromicAcid
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[*] posted on 1-5-2013 at 03:38


You can make a transfer needle using OTC poly tubing and two needles using zip ties to lock the needles in place. Issue is of course inertness of the tubing you can find. The tubing used at the Aldrich website for this is Chem-Flex which has an inner sheath of PTFE:

http://www.sigmaaldrich.com/catalog/product/aldrich/z231029

Not as good as a single piece SS cannula but easier to improvise.




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Eddygp
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[*] posted on 1-5-2013 at 07:58


Sigma-Aldrich is quite expensive... I've checked many other common products and well-known reagents at a normal purity and they aren't cheap. Furthermore, AFAIK they don't sell to individuals.

[Edited on 1-5-2013 by Eddygp]




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Lambda-Eyde
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[*] posted on 1-5-2013 at 10:23


Have you asked Laboy if they still stock cannulas and related equipment?



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Funkerman23
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[*] posted on 1-5-2013 at 11:43


Quote: Originally posted by Lambda-Eyde  
Have you asked Laboy if they still stock cannulas and related equipment?
As of writing this the stock Schlenk flasks& tubes, manifolds, Rubber septa, bubblers, and "solvent retrieval " syringe needles and they claim their inlet/thermometer adapters can be used as a syringe port but they don't stock the rubber disks to use them as such last time I checked. waiting on a reply from them on that matter.



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BromicAcid
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[*] posted on 1-5-2013 at 13:38


Quote: Originally posted by Eddygp  
Sigma-Aldrich is quite expensive... I've checked many other common products and well-known reagents at a normal purity and they aren't cheap. Furthermore, AFAIK they don't sell to individuals.
[Edited on 1-5-2013 by Eddygp]


Indeed, I only linked though to show an example of what I was talking about. One can simply buy 'flavor injector' needles and fit them together with a length of tubing to make a makeshift cannula.




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Mercedesbenzene
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[*] posted on 1-5-2013 at 16:34


I had this problem as well but I found a great solution for it. Go to amazon or ebay and buy some stainless steel tubing, around 15 guage works well. Depending on how long the piece is cut it to the desired size. Then take those pieces and some kind of cylinder and wrap it around to bend it into a U shape as the tubing is usually more ridgid than a regular cannula so it needs to be pre bent. Then you can sharpen on side of the piece to a point so it can pierce septums better, but this is optional. I have made a couple of these, they are very cheap and work like a charm.

http://www.amazon.com/Stainless-Hypodermic-Tubing-0-0055-Len...

I think I used this particular pipe.

[Edited on 2-5-2013 by Mercedesbenzene]
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