Page 3

Question 1

Has preliminary and confirmatory phases

Answer 1

Gerhardt’s Test

Question 2

Gerhardt’s Preliminary test

Answer 2

5 cc urine + 10% FeCl (ferric) until all phosphates precipitate -> Bordeaux red color

Question 3

Bordeaux red is an indication of these analytes in Gerhardt’s Test

Answer 3

Diacetic Acid

Aspirin
Antipyrine
Salicylates

Phenol
Sodium Bicarbonate

Question 4

Gerhardt’s Confirmatory Test

Answer 4

5 cc of another urine portion + 5 cc water + HNO drop

Boil until 5 cc left

Cool, then add 10% FeCl

Question 5

Lindemann’s Test steps

Answer 5

5 cc of urine + 2 drops of 20% acetic acid + 3 drops iodine sol’n + 2-3 drops chloroform

Shake, reddish violet if (+), no change if (-)