Sample Type with a Minimum Volume of "1 unit"

[phillip-toone]

Steps to reproduce

Create a Sample Type with a Minimum Volume of "1 unit". (This could apply to a sample type for a Air Sampling Cassette as an example.)

Current behavior

When attempting to create an Analysis Request of the sample type, nothing appears to happen when the "Save" button is clicked.

Expected behavior

I would expect to be able to use a "unit" as a quantity. I think I had the same problem when I attempted to use cm^3. If these units are not allowed the user should be notified of this when attempting to create a sample type that uses this. Otherwise the user is very confused as to why the Analysis Request won't save to the system.

Screenshot (optional)