# The Milk (Special Designation) Regulations 1989, Paragraph 2: Precautions


The following precautions shall be taken:—
(a) A sample which shows evidence of taint or souring shall not be tested.
(b) All glassware shall be clean immediately before use.
(c) A fresh pipette shall be used for each sample of milk.
(d) The test shall not be carried out in direct sunlight.
(e) Distilled or de-ionised water shall be used throughout.

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Source: https://www.legislation.gov.uk/uksi/1989/2383/schedule/5/part/IV/paragraph/2 (the official version)
Page: https://openlegislation.uk/milk-special-designation-regulations-1989/schedule-5/part-IV/paragraph-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.