Verifying gas tight glass syringe used for making standards

#1
We were recently told that we need to verify accuracy of gas tight glass syringes used for making standards. Anybody have experience doing that? The normal way would seem to be weighing water, but these syringes are actually big enough that we would be using a lot of water. More than we have an analytical balance set up to measure. Also I have no clue if the water would ever come completely out. What else have people done?
 
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Ronen E

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#2
We were recently told that we need to verify accuracy of gas tight glass syringes used for making standards.
Who told you that and in what context? Could they cite an official requirement?
 
#3
The Nelac Institute (TNI) accreditation-they have more than just ISO 17025. The official requirement is that all volumetric devices must be verified if they are not class a glassware, with an exception for syringes that are too small to practically do that-microliters. Someone else here wrote in and asked if that was meant to apply to our syringes and the reply was yes. So we are trying to figure out a reasonable way to do it.
 

Ninja

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#4
Howdy,

Never done it myself, but some thoughts...
but these syringes are actually big enough that we would be using a lot of water
I would think that "the more the better". Larger sample, less error. Get a balance that can handle it, they aren't that expensive.

Also I have no clue if the water would ever come completely out.
I'll bet that a cheap oven capable of 100C would address that...costs less than the balance...
 

Ronen E

Problem Solver
Staff member
Moderator
#5
The Nelac Institute (TNI) accreditation-they have more than just ISO 17025. The official requirement is that all volumetric devices must be verified if they are not class a glassware, with an exception for syringes that are too small to practically do that-microliters. Someone else here wrote in and asked if that was meant to apply to our syringes and the reply was yes. So we are trying to figure out a reasonable way to do it.
Thanks. Apparently this is outside my field.
 
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