test-glucose, sucrose starch,carbohy.proteins quantitatively

[snezka18]

Hello!

Its Me again, what a nag am I hehe.

I done more research and now I found out that you can do titration to test how much glucose is in the solution, i get this part now. But i need to test starch, carbohydrates and proteins quantitatively as well, so i am not sure, are there other tests for that?
and if i get it right you just basically time how long it takes for the solution to decolourise. and put the results in a graph but how can the graph tell u the concentration if you are just timing it? this is very complicated topic indeed!!!
hope someone can help me, i would very much appreciate it!!

Neza

[devikaA]

hey m no scientist but one question...why cant u just do colorimetry or use a spectrophotometer for quantitative analysis?? is it coz its like not accurate or is it coz titration is easier?? n how does titration work here??

[JackBean]

for proteins there are plenty of measurements (look for Bradford e.g.), for starch you could use colorimetric determination with iodine