Subject: When iodine tests for starch is it continous??

This isnt the usual question that gets asked here, more of a simple 
thing than the norm!

Im conducting an experiment into the effect of temperature on enzymes. I 
am wondering if  i had a starch solution and added some IKI to it, 
obviously it will become purple/black. Now is it the end of the test?? I 
mean if i now add some amylase to turn the starch to glucose will the 
colour begin to fade and become the usually iodine yellow?

If that won't work I assume a sample will need to be taken every few 
seconds and mixed with a seperate drop of iodine each time and when the 
drops no longer turn purple the reaction is complete.

Thanks for some advice

Best Regards

Lee Bales

Re: When iodine tests for starch is it continous??