# The Feedingstuffs (Zootechnical Products) Regulations 1999, Paragraph 6


CALCULATING THE RESULTS
The nifursol content in mg/kg of sample is given by the formula:
20×AM
in which:
A=μg of nifursol read from the calibration curve; and
M=mass of the test portion in g.

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Source: https://www.legislation.gov.uk/uksi/1999/1871/schedule/5/part/III/paragraph/6 (the official version)
Page: https://openlegislation.uk/feedingstuffs-zootechnical-products-regulations-1999/schedule-5/part-III/paragraph-6
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.