# The Feeding Stuffs (Sampling and Analysis) Regulations 1999, Paragraph 2: Principle


Uric acid is extracted with neutral ethanotic formaldehyde solution, precipitated as silver magnesium urate, redissolved in sodium thiosulphate solution and determined spectrophotometrically.

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Source: https://www.legislation.gov.uk/uksi/1999/1663/schedule/2/part/4/paragraph/2 (the official version)
Page: https://openlegislation.uk/feeding-stuffs-sampling-and-analysis-regulations-1999/schedule-2/part-4/paragraph-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.