Fertilisers (Sampling and Analysis) Regulations (Northern Ireland) 1996

REAGENTS
Diluted hydrochloric acid:

4.—4.1 One volume of hydrochloric acid (ρ = 1.18 g/ml) and one volume of water.

4.2 Barium chloride solution BaCl2.2H2O: 122 grams per litre.

4.3 Silver nitrate solution: 5 grams per litre.