measuring with syringes

[dhdaniel]

I have been using several different sizes of syringes, And I use 2" long 14 gauge blunt needles

What I am wondering is if the amount of liquid thats in the needle itself is enough to offset
the amount I am measuring? I'm thinking these may hold as much as 1ml

make any sense?

Maybe I need to change up my process

any thoughts?

thanks
Dave

 

[FrogmanDave]

You probably do retain some amount of the flavor, nic, vg, pg, whatever, in the needle, but, that liquid will stay in the needle after the plunger reaches the bottom of it's stroke. The liquid can only be pushed out of the needle if there is something to push it out. I suppose if you had an air bubble on top of the liquid, this would be the case, but you shouldn't be having that in the first place. So, in my opinion, no you don't have to account for the amount in the needle.

 

[dhdaniel]

That makes good sense.

thanks!

Dave

 

[dannyv45]

As long as you measure correctly whats left in the needle can go back into the flavoring bottle.

 

[csardaz]

Suck it up to your measurement line, push it out. Then Suck up a syringe full of air and push it out and see how much liquid comes out with the air. The air should push nearly all of it out. If its a significant amount then maybe you want to air-flush it back to where it came from.

 

[DenaInWyo]

Measure like this (says the nurse used to using syringes/drugs):

Pull up more in the syringe than you need. Push back out to get to a marker. Hold the syringe blunt tip down, and push the plunger for the amount you need. That much will be pushed out of the syringe and it won't matter what's left in it, or if there's air at the top even.

Example: You need 1 mL of something. Draw up over 2 mL. Push out enough to get you right at the 2 mL mark on your syringe. Hold it over your bottle and push out enough liquid to get to the 1 mL mark. There will be some left, but 1 mL is the amount that will be pushed out.

I hope that makes sense..it's a lot easier to show someone that than to explain it!

 

[WharfRat1976]

Measure like this (says the nurse used to using syringes/drugs):

Pull up more in the syringe than you need. Push back out to get to a marker. Hold the syringe blunt tip down, and push the plunger for the amount you need. That much will be pushed out of the syringe and it won't matter what's left in it, or if there's air at the top even.

Example: You need 1 mL of something. Draw up over 2 mL. Push out enough to get you right at the 2 mL mark on your syringe. Hold it over your bottle and push out enough liquid to get to the 1 mL mark. There will be some left, but 1 mL is the amount that will be pushed out.

I hope that makes sense..it's a lot easier to show someone that than to explain it!

This is exactly what I do so I don't have to deal with the last drops at the end. I do not like to wait for drops to fall into a 5ml bottle. I just squirt the rest back into the source bottle.

Anyway, the amount of fluid remaining in a needle is so negligible. I don't sweat the small stuff. I am after the bigger picture---the overall...and yes, consistency with measuring and mixing is what is important.