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Paragraph 3 Reagents

Original text. Later amendments are not shown.

The following reagents shall be used–

(a)

cyclohexane (analytical reagent grade);

(b)

dicholoromethane (analytical reagent grade);

(c)

hydrochloric acid 25 per centum (weight/volume);

(d)

silica gel GF 254 (Merck or equivalent);

(e)

0.5 per centum (weight/volume) solution of 2,4,7-trinitrofluorenone (TNF) (Fluka, BDH or equivalent) in acetone;

(f)

0.1 per centum (weight/volume) solution of 2,6-dibromo—p-benzoquinone-chlorimine in ethanol (stable for up to one week if kept in the refrigerator);

(g)

concentrated solution of ammonia, specific gravity: 0.9;

(h)

standard 1 per centum (weight/volume) solution of pure biphenyl in cyclohexane;

(j)

standard 1 per centum (weight/volume) solution of pure 2-hydroxybiphenyl in cyclohexane.