Test for Melanuria and Alkaptonuria and MSUD

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Ferric Chloride Tube Test

Result: Gray or black ppt

Clinitest

Result: Yellow ppt

2,4-dinitro-phenylhydrazine (DNPH) reaction

Result: Yellow turbidity or ppt

Ammoniacal Silver Nitrate Test

Result: black urine

Urinary Homogentisic Acid Test

Result: observe for darkening of the color (Ascorbic Acid interferes the test)

Sodium Nitroprusside test

Result: red

FeCl3 Test

Result: transient deep blue color in test tube

Sodium Nitroprusside test

Screening test

FeCl3 Test

Screening test for metabolic disorder

Urinary Homogentisic Acid Test

Screening test. add alkali to freshly voided urine

Clinitest

Test for reducing substance

2,4-dinitro-phenylhydrazine (DNPH) reaction

urine screening test most frequently performed for keto acids

Ferric Chloride Tube Test

Oxidation of chromogen

Ammoniacal Silver Nitrate Test

Addition of silver nitrate and ammonium hydroxide to urine


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