Someone good with practicals would get this!?

i'm doing a bio project, testing the effect of pH on immoblized and non-immoblized enzymes, using invertase enzyme and sucrose solution. BUT the only way to test for glucose is through a diabetes strip thing, however when changing pH i will get different colours( ie pH1= red...etc) and when i pour this pH 1 solution into the enzyme/sucrose solution it will change colour. After that i would put the strip inside the test tube, but i will not see the colour change of the strip with this different colour (made by the pH) and i would not be able to tell how much glucose there is in there!!! HELPPP, HOW DO I FIX THIS PROBLEM!!



thanks for your help, sorry about the explanation!Someone good with practicals would get this!?
add the acidic ph, take the new reading, then neutralize it with water.