mixing test batch using syringe and needle

[Frankster79]

I just made my first diy juice today.
When it comes to the syringe,how accurate is it for making small test batches?
If i measure up 1ml in the syringe,theres around 0.2 ml in the tip and needle
How do i work around this to make it exactly 1ml?

I use a 5 ml syringe while i wait for the 1ml to arrive.
I also have a 1 ml pipette that i used to make this first 2ml test juice.
Is 1 drop from the pipette the same as 1 drop from a dropper bottle?
I did a test with the pipette,turned out to be alot more than 20 drops in 1 ml.

 

[canoeist]

If I am wanting 1 ml out of a syringe, I will pull the plunger off the bottom a little bit, then draw the liquid up to 2ml and press out to 1ml, then return the remaining liquid in the syringe to the bottle.
Very accurate but you must use a different needle and syringe for different liquids since you are returning some back to bottle.

 

[kidbeaster]

I wouldn't worry about the volume of liquid in the tip and needle. The volume of liquid stays in the tip and needle so the actual amount of measurable liquid is whats in the syringe itself.

 

[Frankster79]

If I am wanting 1 ml out of a syringe, I will pull the plunger off the bottom a little bit, then draw the liquid up to 2ml and press out to 1ml, then return the remaining liquid in the syringe to the bottle.
Very accurate but you must use a different needle and syringe for different liquids since you are returning some back to bottle.

Thank you, thats a great way to get it very accurate
Just need to get more syringes..

Not completely confident using the pipette

 

[panachronic]

I wouldn't worry about the volume of liquid in the tip and needle. The volume of liquid stays in the tip and needle so the actual amount of measurable liquid is whats in the syringe itself.

Exactly. The liquid in the needle is like a "tare" (look it up). You will get more accurate measurements by ignoring it. What counts is the swept volume covered by the movement of the plunger.