如何測試飲品中所含的糖份

You can use benedict' solution (Blue) to test if there is reduced sugar in the drink.

steps:

1. Put some sample of the drink and add 1 to 2 droppd of dilute HCl in the test tube , shake to make sure mix together.

2. Put 5-10 ml (in excess) benedict solution into the test tube.

3. Put the mixture in a hot water bath.

4. If reducing sugar (Glucose) is present, red precipitate (cu solid) will be formed.

Thoery:
When Cu2+ ion is reduced by glucose, it will turn into Cu+ ions which is the red precipitate you see.

2007-11-26 15:26:30 補充：
Sorry, wrong sentence at the first line, it should be:You can use BENEDICT solution (Blue in colour) to test if there is REDCUTING sugar in the drink.