ANNEXU.K.DETERMINATION OF DICHLOROMETHANE AND 1,1,1-TRICHLOROETHANE

IDENTIFICATION AND DETERMINATION OF MERCAPTOACETIC ACID IN HAIR-WAVING, HAIR-STRAIGHTENING AND DEPILATORY PRODUCTSU.K.

5.DETERMINATION (see NB)U.K.

5.2. Gas chromatograyhy U.K.

5.2.6. Preparation of the standard U.K.

Prepare a standard solution of mercaptoacetic acid (5.2.2.1) of known strength containing about 60 mg of pure mercaptoacetic acid (5.2.2.1) in 2 ml.

This is solution ‘E’.

Precipitate, assay and methylate as described in 5.2.4 and 5.2.5.