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October 18, 2025, 12:08:32 pm
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Author Topic: testape colour changes  (Read 2218 times)  Share 

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Nomvalt

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testape colour changes
« on: April 27, 2010, 10:45:15 pm »
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Does anyone here know what the colour change observed in a length of testape is after it is put in a solution of glucose? Also what are the colour changes observed when testape is put in two individual solutions of maltose and sucrose?
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crayolé

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Re: testape colour changes
« Reply #1 on: April 28, 2010, 04:05:34 pm »
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There should be a colour guide on the back of the packaging.

In the presence of no glucose, it is white. When it comes into contact with glucose, it changes into a green colour, getting darker as the concentration increases

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vea

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Re: testape colour changes
« Reply #2 on: April 30, 2010, 06:41:41 pm »
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Testape starts off with a pinkish colour and when in the presence of glucose turns light purple to dark purple depending on how concentrated the glucose in the solution is. As for maltose and sucrose I have no idea...
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