# Fertilisers (Sampling and Analysis) Regulations (Northern Ireland) 1996, Paragraph 4: REAGENTS


Diluted hydrochloric acid:
4.1 One volume of hydrochloric acid (ρ = 1.18 g/ml) plus one volume of water.
4.2 Aluminium nitrate Al(NO3)3. 9H2O.
4.3 Caesium chloride, CsCl.
4.4 Anhydrous sodium chloride, NaCl.
Caesium chloride and aluminium nitrate solution
4.5 Dissolve in water 50 g of caesium chloride (4.3) and 250 g of aluminium nitrate (4.2) in a 1 litre graduated flask. Make up to volume with water and mix.
Standard sodium solution of 1 mg/ml of Na
4.6 Dissolve in water 2.542 g of sodium chloride (4.4) in a 1 litre graduated flask. Add 10 ml of hydrochloric acid (4.1). Make up to volume with water and mix.

---
Source: https://www.legislation.gov.uk/nisr/1996/513/schedule/2/part/I/chapter/24./paragraph/4 (the official version)
Page: https://openlegislation.uk/fertilisers-sampling-and-analysis-regulations-northern-ireland-1996/schedule-2/part-I/chapter-24./paragraph-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.