There is an ASTM method that exists and defines what properties the glass must have in order to be called 33 or 51.
Ions | Type I Class A clear glass(33) | Type I Amber (51) |
---|---|---|
Na | 0.3-0.5 | 0.4-1.4 |
K | ND | ND-0.02 |
Ca | ND | ND-0.1 |
Mg | ND | |
Al | ND | ND-0.5 |
Fe | ND | ND |
Ba | ND | ND-0.2 |
Zn | ND | ND |
Mn | ND | ND |
Si | ND | ND-5 |
Results are in ug/ml
ND = Non detectable