Naming convention for buffer solutions/systems

Is there an official naming convention to follow for buffer solutions/systems? I've noticed that the name of the buffer usually just follows the name of the salt (ex. sodium acetate buffer), but what if the buffer is diprotic? 


If I mixed tartaric acid with its double salt, potassium sodium tartrate, would the resulting buffer simply be "potassium sodium tartrate buffer"? Or would it be something like "bitartrate-tartrate buffer"?


