Re Using Visking Tubing

It took me a long time to realise this but I now dry out visking tubing that had been soaked, but then not used in a practical. The stuff is so expensive and in the past I used to throw out the unused soaked stuff! It works perfectly fine the next time around!
Even the used stuff can be reused if washed out thoroughly and then dried
 
Re-used is ok for basic experiments and if you're going to put a mixture of glucose and starch inside. However re-used doesn't work as well if you're digesting starch with amylase and then looking for diffusion of glucose (maltose really!). If you want a positive Benedict's test using the water surrounding the tubing in under 30 mins, use new.
 
Re-used is ok for basic experiments and if you're going to put a mixture of glucose and starch inside. However re-used doesn't work as well if you're digesting starch with amylase and then looking for diffusion of glucose (maltose really!). If you want a positive Benedict's test using the water surrounding the tubing in under 30 mins, use new.
We have never had a +ve test result doing that. :(
 
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