NUTRITION
CARBOHYDRATES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Osazone formation
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Mucic acid test
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Barfoed Test
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Bial’s Orcinol Test
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Detailed explanation-1: -Mucic acid test is a test that is highly specific and is used for the detection of the presence of galactose and lactose. It is also termed galactaric acid that is named after the product of the reaction.
Detailed explanation-2: -Mucic acid, C6H10O8 or HOOC-(CHOH)4-COOH (also known as galactaric or meso-galactaric acid) is an aldaric acid obtained by nitric acid oxidation of galactose or galactose-containing compounds such as lactose, dulcite, quercite, and most varieties of gum.
Detailed explanation-3: -Crystals will be produced below the tube if the sample contains galactose or its derivatives. This is regarded as a positive result for mucic acid test.
Detailed explanation-4: -Purpose: • To identify the presence of the sugar galactose in food or in synthetics manufacture. When concentrated nitric acid is heated together with galactose, a dicarboxylic acid called mucic acid forms as a white precipitate, which counts as a positive result. It can also detect lactose and agar-agar.