# The Feeding Stuffs (Sampling and Analysis) Regulations 1999, Paragraph 6: Expression of the Results


The per cent content of isobutylidenediurea in the sample is given by the formula:
AW×10 where:
A weight of isobutyldenediurea (mg) read from the calibration curve; and
W weight of sample in grams.

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Source: https://www.legislation.gov.uk/uksi/1999/1663/schedule/2/part/5/paragraph/6 (the official version)
Page: https://openlegislation.uk/feeding-stuffs-sampling-and-analysis-regulations-1999/schedule-2/part-5/paragraph-6
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.