Paragraph 2 Precautions
The following precautions shall be taken:—
(a)
a sample which shows evidence of taint or souring shall not be tested;
(b)
the test shall not be carried out in direct sunlight;
(c)
all glassware shall be clean immediately before use;
(d)
a fresh pipette shall be used for each sample; pipettes shall not be contaminated with saliva;
(e)
distilled water shall be used throughout.