Pipette pumps and what they offer

[the_vape_nerd]

I came across this item today on Amazon.

Karter Scientific 206L3 Fast Release Pipette Pump Pipettor, Up to 25ml, Red: Amazon.com: Industrial & Scientific

They offer additional sizes and so on. Have any of you used these? Can you tell me if they make mixing easier, faster, more convenient? I wouldn't mind the small outlay of money if it's a big help over syringing.

Also, if you have information on what type of pipettes are used, I'd appreciate that as well.

Thanks in advance for all info/help.

 

[Kemosabe]

i have never seen one of those but it looks like it hooks onto a glass pipette in order to use it like a syringe. but honestly i could be way off. it just looks that way, plus i see no other way to use the glass pipettes (unless youre dunking it inot a bucket and putting your finge rover the top like a straw.

 

[the_vape_nerd]

i have never seen one of those but it looks like it hooks onto a glass pipette in order to use it like a syringe. but honestly i could be way off. it just looks that way, plus i see no other way to use the glass pipettes (unless youre dunking it inot a bucket and putting your finge rover the top like a straw.

thats how i figure it works, attach the glass pipette and then it sucks the liquid up

i sometimes make large batches this seems like a good idea but want some feed back

 

[FinallyQuit]

There was a thread about this recently, someone bought a glass pipette and pump off amazon. Let me see if I can dig it up for you.

http://www.e-cigarette-forum.com/forum/diy-e-liquid/437138-my-diy-gets-out-hand-quickly-2.html

Page 2, I think post 32. Jfaria has one!

 

[k3vin]

I used one for awhile and still have one actually.they are OK,but I just order 100 pack of 1cc syringes off of amazon and honestly they work just fine if not better.only pennys a piece. due to the lo9ng length of the pipette,I didnt consider them more efficent than syringes.
convenience? MEH,not all that convenient in my use anyway,and not easy to clean out the flavors.They are so long,(the pipettes) that I would sometimes almost knock over a bottle of flavoring..I had the plastic pipettes,not the glass..
And definetly didnt seem to make it faster,if anything slowed me down due to their long length.

The inside of the bottom housing is a rubber type material that actually grabs the pipette when you push it up into it,to remove the pipette just pull it out.

 

[Spazmelda]

I have used these in the lab. I have some and some pipettor bulbs/pumps at home, but I haven't used them for DIY for the following reasons.

1. Viscous liquids tend to cling to the insides of the glass or plastic pipettes. This was a problem in the lab. I don't know how VG or pg does in them.
2. Glass pipettes are long and easy to break. Hard to store.
3. They are difficult to clean. They are too long to fit in a normal sink and run water through. Could use a squirt bottle, but that seems tedious to me. In the lab we used specialty pipette washers, a tall cylinder that flushes several rounds of water through automatically. These are relatively expensive and not practical for home use (I have seen a DIY version made out of pvc though, but overkill for the small number of pipettes you'd be using for DIY.)

I use syringes at home. The plunger makes it easy to get thick liquids out. They are easy to clean. Inexpensive, and accurate enough for diy if you have several different volumes of syringe.

Eta: most of the more modern labs I've worked in don't really use these anymore as there are much more convenient options now. Most too expensive for DIY though.

 

[the_vape_nerd]

Thanks. This is exactly the kind of feedback I wanted. I don't think I'll be ordering them. I already have a ton of syringes in all sizes.

 

[Jfaria1891]

There was a thread about this recently, someone bought a glass pipette and pump off amazon. Let me see if I can dig it up for you.

http://www.e-cigarette-forum.com/forum/diy-e-liquid/437138-my-diy-gets-out-hand-quickly-2.html

Page 2, I think post 32. Jfaria has one!

Haha I was surprised to be reading through posts and see my name I feel special now haha

Indeed I do a 1ml one I use for flavorings everything else gets done with syringes

More accurate then you will probably ever need

 

[subver]

Yeah, plus, whatever method you use, as long as it's consistent is fine.. we don't even necessarily have to be accurate, just consistent. Unless of course you are relaying your recipe to someone else.. but still, I think syringes are more than enough. I was going to get a bunch of glass pipettes too, but ultimately decided not to for a bunch of reasons listed here already.

 

[Spazmelda]

One of the most important things I learned in lab work was that there were times you needed to be precise and accurate, and there were times when precision and accuracy were not necessary. Sometimes I would have to set up a series of 25 microliter reactions. For those is was extremely important to be as precise and accurate as possible. Small mismeasurements in a 25 ul volume are massive. For those, ul measurements were essential.

Mixing up 5 liters of buffer, however... We didn't need a scale that read down to 4 decimal places. 2 was enough, and to try to measure the buffer components on a scale that read to 4 decimal places would be a gigantic waste of time and effort. We didn't need to measure the liquids down to the microliter. A 1 liter graduated cylinder was plenty accurate enough.

I look at making nicotine liquids as somewhere in between these two extremes. You want to be sure that you are pretty close, especially with nicotine. But we don't need ul precision here. If you are measuring less than a ml, a 1 ml syringe is close enough. Sure, a glass pipette would be more precise, but we don't need that sort of precision. It's overkill.

Oh, and I forgot to mention... Some of this comes down to how accurate and precise your starting materials are. I don't know to how many significant figures they measure the nicotine base, but I'd imagine its not that precise. If your base is 100.0 mg/ml +/- 2 mg/ml, it doesn't make much sense to be trying to measure out 0.9762 ml of the liquid. Don't know if that makes sense.

 

[zoiDman]

The Concepts of Accurate and Precise is something that Many people have a Problem with.

For me, as long as my DIY is Precise, and a Recipe is Repeatable, than Accuracy is not that Important. Using a Graduated Cylinder to make Unflavored "Pre-Mix" Nicotine Base and Drops for Flavoring / Sweeteners works fine for me.