# Fertilisers (Sampling and Analysis) Regulations (Northern Ireland) 1996, Paragraph 8: DETERMINATION


Prepare the spectrometer (5) for the measurements at 589.3 nm. Calibrate the instrument by measuring the response of the calibration solutions (6.2). Then adjust the sensitivity of the instrument to use its entire scale when the most concentrated calibration solution is used. Then measure the response of the sample solution to be analysed (7). Repeat this operation twice.

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Source: https://www.legislation.gov.uk/nisr/1996/513/schedule/2/part/I/chapter/24./paragraph/8 (the official version)
Page: https://openlegislation.uk/fertilisers-sampling-and-analysis-regulations-northern-ireland-1996/schedule-2/part-I/chapter-24./paragraph-8
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.