# Fertilisers (Sampling and Analysis) Regulations (Northern Ireland) 1996, Paragraph 3: PRINCIPLE AND DEFINITION


Heat the sample in an Erlenmeyer flask by immersing the flask in a water bath at 50°C and maintain at this temperature for two hours (phase at 50°C). Then cool the flask in water bath at 20°C and maintain at this temperature for two hours (phase at 25°C). The combination of the two phases, first at 50°C then at 25°C, forms one thermal cycle.

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Source: https://www.legislation.gov.uk/nisr/1996/513/schedule/2/part/I/chapter/14a./paragraph/3 (the official version)
Page: https://openlegislation.uk/fertilisers-sampling-and-analysis-regulations-northern-ireland-1996/schedule-2/part-I/chapter-14a./paragraph-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.