AIM: To test the presence of protein in the given food sample.
PROCEDURE:
| S. No. | Experiment | Observation | Inference |
| 1 |
BIURET TEST Food sample + few drops of NaOH + CuSO4 solution. |
A violet colouration is obtained. | Protein present. |
| OR | |||
| 2 |
XANTHOPROTEIC TEST Food sample + few drops of concentrated HNO3. Heat. |
A yellow precipitate is obtained. | Protein present. |
| OR | |||
| 3 |
NINHYDRIN TEST Food sample + few drops of 0.15 ninhydrin solution. Boil the contents. |
A blue colour is obtained. | Protein present. |
RESULT: (ON RULED SIDE ) The food sample has been tested for proteins.
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it was very useful……