AQA exam Board Isolation medium

I have a request for RP 8 AQA A level which requires the above. I have found two solutions left by my previous tech, one is a milky colour which fizzed as I opened it (was refrigerated), the other was colourless with no fizz and was not.

Is it best just to chuck both? How long does such a solution last?
 
I have a request for RP 8 AQA A level which requires the above. I have found two solutions left by my previous tech, one is a milky colour which fizzed as I opened it (was refrigerated), the other was colourless with no fizz and was not.

Is it best just to chuck both? How long does such a solution last?
it's mostly sugar, so does not keep.
 
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