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pharmacognosy > Carbohydrates > Flashcards

Carbohydrates Flashcards

1
Q

Anthrone Test

A

Anthrone + Con. H2SO4

bluish-green

Dehydration > Furfural > Complex (CARBOHYDRATES)

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2
Q

Molisch Test

A

a-Naphthol + Con. H2SO4

Purple ring

Dehydration > Furfural > Complex (CARBS larger than TETROSES)

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3
Q

Fehling’s Test

A

A: Cupric Sulfate
B: Alkaline Sodium Potassium Tartrate

Yellow to Red PPT

Reduction of cupric ion (Reducing monosaccharides)

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4
Q

Benedict’s Test

A

Sodium carbonate + Sodium citrate + Copper (II) sulfate pentahydrate

Red, green, or yellow precipitate

Reduction of cupric ion (Reducing sugar)

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5
Q

Barfoed’s test

A

Cupric acetate

Red PPT

Reduction of cupric ion (Reducing monosaccharides)

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6
Q

Nylander’s Test

A

Bismuth nitrate + sodium tartrate + KOH

Black soln or PPT

Reduction of bismuth ion (Reducing sugar)

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7
Q

Osazone test

A

Phenylhydrazine + Sodium acetate

Carbonyl > phenylhydrazone > osazone (REDUCING SUGAR)

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8
Q

Fructose

Shape

A

Needle

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9
Q

Galactose

A

Thorny ball / Rhombic plate

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10
Q

Glucose

A

Needle / Broomstick

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11
Q

Lactose

A

Cotton balls / Puff

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12
Q

Maltose

A

Sunflower / Petal

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13
Q

Tollen’s test

A

AgNO3 + NH3 + NaOH

Silver mirror / Black PPT

diaminesilver(I) complex > reduces silver ion (ALDOSE)

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14
Q

Seliwanoff’s test

A

Resorcinol + Con. HCl

Red / Cherry Red PPT

Dehydration > furfural > complex (KETOSE)

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15
Q

Bial’s Test

A

Orcinol + Con. HCl + FeCl3

Bluish color

Dehydration > Furfural > complex (PENTOSE)

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16
Q

Aniline Acetate Test

A

Aniline + Glacial Acetic Acid

Bright red / Pink Paper

Dehydration > Furfural > Fumes (PENTOSE)

17
Q

Mucic Acid Test

A

Water + Con. HNO3

White / crystal PPT

Oxidation > complex (GALACTOSE)

18
Q

Iodine Test

A

Blue-black complex (STARCH)
Pale brown (Glycogen)

Iodine soln

Complex (STARCH)

pharmacognosy (11 decks)

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