DMT-Nexus member
Posts: 345 Joined: 05-Sep-2013 Last visit: 06-Nov-2015
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Hello, No, I did not contract an STD from using my pipette  That being said, I am currently using a rubber pipetting aid: http://www.sigmaaldrich....72?lang=fr®ion=BEIt degrades from the solvent fumes and I'm not sure if this is a possible source of contamination (I sometimes squeeze the suction valve then squeeze the ball to squirt out the solvent)... Which makes me wonder if one of these http://www.youtube.com/watch?v=m6zi_wJBVZcwould be any better/safer as far as reducing risk of contamination is concerned? If not, I'm open to suggestions for alternative pipetting aids - but not one of those 500 euro electronic "guns" My avatar was taken from google images and is actually a work of art by NEIL GIBSON, credit where credit is due! Bodies don't have souls - souls have bodies Old enough to know better, young enough to try again
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DMT-Nexus member
Posts: 329 Joined: 05-Jan-2013 Last visit: 02-Apr-2024 Location: tingüindolandia
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If you are using it for DMT extractions (for smoking or oral) I wouldn't worry about contamination to be honest, I would just make sure not to overfill the pipete so liquid doesn't touch the ball, I have been doing it like that with no fumes reaching the rubber.
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Homo discens
Posts: 1827 Joined: 02-Aug-2012 Last visit: 07-Aug-2020
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I'm about to switch to glass-on-glass syringes, just to be safe. I feel like they might work a little bit better as well.
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DMT-Nexus member
Posts: 194 Joined: 31-May-2012 Last visit: 12-Jul-2023
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One of those 500€ electronic guns!  They are very reliable and precise  I don't like working with these plastic things. They tend to have some issues like loosing pressure or getting stuck. Also I can be much more precise with the rubber ball and it works much more intuitive. They are IMO the best cheap ones and they are all over most of the labs. Just beware to not get liquid into the ball.
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DMT-Nexus member
Posts: 557 Joined: 12-Jul-2012 Last visit: 01-Jan-2021
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I always simply put a bit of tubing on the end of a plastic syringe.
A syringe with twice the volume of the intended pipette seemed ideal for me so my thumb wouldnt have to go too far out there, tho a 1 ml syringe on a 1 ml pipette gave very precise control.
Advantages are you can see inside the syringe and thus spot any contams building up, you can clean inside the syringe and actually dry it, theyre piss cheap and thus its easier to justify having several and it wont make you delay throwing out a questionable unit.
Disadvantages? Unlike the rubber bulb ones, if you paint a syringe and use it as a christmas tree ornament people will look at you oddly. That, and there might be an issue with some solvents.
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*
Posts: 367 Joined: 16-Feb-2011 Last visit: 18-Sep-2017 Location: in your Mind
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i use one of these with a 50ml pipette http://www.sigmaaldrich....78?lang=en®ion=SXit is simply the best for its price, fast, precise, no electronics, replacable filters For the adventurous it can even be used to play lightsaber with the pipette or safely but fiercly bump people on the head with its rubber parts Just buy it blessed be all forms of intelligence
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Homo discens
Posts: 1827 Joined: 02-Aug-2012 Last visit: 07-Aug-2020
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I would not recommend using any rubber or plastic that is going to come into contact with solvents, even HDPE. Solvents (even VM&P naphtha) will degrade plastic and rubber and leave undesirable impurities in the final product, even if the damage to the plastic/rubber is not visible to the naked eye. Glass is the way to go.
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DMT-Nexus member
Posts: 1222 Joined: 24-Jul-2012 Last visit: 10-Jul-2020
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I had no idea these existed. This would have helped me so much. These damn store pipettes DO loose suction and spill out liquid and such. Really a mess.. But now.. The future is here.  "Think more than you speak"
"How do you get rid of the pain of having pain in the first place? You get rid of expectations"
"You are everything that is. Open yourself to the love and understanding that is available."
"To see God, you have to have met the Devil."
"When you know how to listen, everyone becomes a guru."
" One time, I didn't do anything, and it was so empty... Almost as if I wasn't doing anything. Then I wrote about it. It was fulfilling."
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DMT-Nexus member
Posts: 557 Joined: 12-Jul-2012 Last visit: 01-Jan-2021
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Entheogenerator wrote:I would not recommend using any rubber or plastic that is going to come into contact with solvents They should never come into contact with solvents or reagents, thats not what pipette bulbs, etc are for. When I've seen them die its usually been when a student sucks solvent into one, a chemist or lab tek wouldnt do that because its abuse of the equiptment. Tho I have seen some go crunchy or have O-rings fail because of people (not all of them students) not airing out the unit after using it with solvents. Dont suck junk into your ball.
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DMT-Nexus member
Posts: 1760 Joined: 28-May-2009 Last visit: 10-Oct-2024
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Glass turkey baster. Cost me hardly any money and works like a charm. Can't say the "micro pipette controller" doesn't look appealing, because it does... however, I don't have £40 to spend on such an apparatus.
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DMT-Nexus member
Posts: 1303 Joined: 12-Nov-2008 Last visit: 11-Sep-2024 Location: ...
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I like a glass syringe and a 100mm stainless steel needle for most operations, it works very well when a layer to be separated is quite thin.
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DMT-Nexus member
Posts: 4612 Joined: 17-Jan-2009 Last visit: 07-Mar-2024
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takes time but no 'extra' basemix once you get down there.
- 10ml pipette
- a small plastic syringe to get the last few drops
- and a Rossi glass wine jug with thin neck (perfect for extractions and getting all the naphtha off due to the thin neck at the top which can hold 80ml or so of naphtha.
<3 tat
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