ScienceHideout
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Saccharides to Ketone
Hi Everyone!
In my science project, I need to test for sugar. Well, I was dumb and bought ketone test strips- because the pharmacist said that it tests for sugar.
I was wondering if there is a reagent I can use to convert my monosaccharides into a ketone.
Note- I can not test for dimethyl ketone.
Thanks for any help in advance!
-Dean
hey, if you are reading this, I can't U2U, but you are always welcome to send me an email!
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Hexavalent
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This should probably be in the beginners section.
It is difficult to ascertain what you are trying to do . . .
Monosaccharides are the simplest carbohydrates in that they cannot be hydrolyzed to smaller carbohydrates. They are basic units of Carbohydrates. They
are made up of only one carbohydrate moiety.
The general chemical formula of an unmodified monosaccharide is (C•H2O) n, literally a "carbon hydrate. This is termed as the empirical formula. In
this formula the” n” varies form 3-6 and rarely seven. This implies that in nature no. of carbon atoms found in monosaccharide varies from minimum
3 to maximum 7. The smallest monosaccharides, for which n = 3, are dihydroxyacetone and glyceraldehyde. However, not all carbohydrates conform to this
precise stoichiometric definition (e.g., uronic acids, deoxy-sugars such as fucose), nor are all chemicals that do conform to this definition
automatically classified as carbohydrates.
Monosaccharides are classified according to three different characteristics:
Placement of its carbonyl group,
Number of carbon atoms it contains, and
Its chiral handedness.
If the carbonyl group is an aldehyde and attached to C-1, the monosaccharide is an Aldose; if the carbonyl group is a ketone attached to C-2, the
monosaccharide is a Ketose. Therefore monosaccharides are called aldoses and ketoses derivatives of polyhydric alcohols. Glucose is an example of an
aldose and fructose is an example of ketose.
Thus, some saccharides do contain ketone groups and therefore could partially be classified in some ways as ketones (the complex carbs are known as
polyhydroxy ketones, so you work out what the monomers, dimers or whatever else you have are.
If you simply want to test for a ketone, then you can do so as described here;
http://www.chemguide.co.uk/organicprops/carbonyls/oxidation....
A test for sugar, by the way, is to add Benedict's reagent to the sample, heat in a hot water bath and look for a colour change to orange/brown.
"Success is going from failure to failure without loss of enthusiasm." Winston Churchill
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barley81
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Here's the article if you wanna read more.
http://eduframe.net/andc/biology/Sunita-Bio/carbohydrates%20...
Here is a quote from the Walmart page for ketone test strips:
| Quote: | The ReliOn Ketone Test Strips are specially designed for urinalysis to check for the presence of acetoacetic acid. These strips provide a simple, fast
and convenient way to detect the ketone level in urine, making them an ideal choice for low carbohydrate dieters. They provide information on
carbohydrate and fat metabolism. The urine ketone testing strips contain a chemical reagent that changes color within 15-20 seconds to indicate the
presence of ketone. You need to compare the color change with the color blocks provided on the label of the urinalysis reagent test strips. These
ReliOn strips also help manage and safeguard against the risk of diabetic ketoacidosis. It is a safe and easy way for keeping track of changes ketone
in your body according to which adjustments in your diet and/or medication can be recommended by your healthcare team.
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These test strips may not test for all ketones. I have a feeling they test for "ketone bodies," since acetoacetic acid (which the information quote
mentions) is one of these ketone bodies.
http://en.wikipedia.org/wiki/Ketone_bodies
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Nicodem
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Thread Moved
24-5-2012 at 11:00 |
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