# Feeding Stuffs (Sampling and Analysis) Regulations (Northern Ireland) 1999, Paragraph 3.9: Reagents

Extent: N.I.
Status: prospective

Standard uric acid solution: weigh to the nearest 0.1 mg, 250 mg of uric acid and transfer to a 150 ml round-bottomed flask fitted with a reflux condenser. Add 100 ml ethanolic formaldehyde solution (3.3) and boil under reflux on a steam bath for 30 minutes, shaking frequently. Cool, transfer the solution to a 250 ml graduated flask, wash the round-bottomed flask with ethanolic formaldehyde solution (3.3) and combine the washings with the uric acid solution. Dilute to the mark with ethanolic formaldehyde solution (3.3) and mix. 1 ml contains 1 mg of uric acid.

---
Source: https://www.legislation.gov.uk/nisr/1999/296/schedule/2/paragraph/3.9 (the official version)
Page: https://openlegislation.uk/feeding-stuffs-sampling-and-analysis-regulations-northern-ireland-1999/schedule-2/paragraph-3.9
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.