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Test for sugars


smhjn17

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We have benedict n fehling as the default tests for sugars in most chemical analysis....however these tests are actually detecting only the aldehyde group in the sugars....

Technically we are just detecting aldehyde n not a sugar

Isnt there any other more specific testing procedure for sugars ??? What about caramelization test in addition to aldehydic group test??

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Caramelizing doesn't help much- vitamin c caramelises- but it isn't a sugar.

The basic problem is that "sugar" covers a range of different substances and getting a test that includes them all, but excludes other chemicals would be impossible.

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Not all sugars are aldehydes.

For example, fructose is not an aldehyde.

But sugar like fructose do give +ve for benedict due to the hemiketal group

Benedict test will also be shown by ketose sugars though ... So benedict is not an issue, just benedict is !

It IS, however a ketone. But the arising issue here is while sugars are hydroxycarbonyl molecules, hydroxycarbonyl molecules don't have to be sugars.

Yes this is the problem

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  • 2 months later...

It is not evil since it's simply comprised out of 2 natural aminoacids and a tiny bit of methanol, for which you need to eat 10s of grams of sweetener of to reach the same levels as found in a single apple.

Edited by Fuzzwood
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What do you guys think about Aspartam? good / bad? :) it was created by Monsanto so its probably evil :D

I think you should learn to spell it correctly.

You should learn to spell "it's" correctly too.

Also, since it's not a sugar, it has nothing to do with the thread, so perhaps you should learn how the forum works while you are at it.

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