BS 1704 Specification for solid-stem general purpose thermometers
BS 6068-2.37 Water quality. Physical, chemical and biochemical methods. Method for the determination of chloride via a silver nitrate titration with chromate indicator (Mohr's method)
BS 6068-2.42 Water quality. Physical, chemical and biochemical methods. Determination of sodium and potassium: determination of sodium by atomic absorption spectrometry
BS 6068-2.43 Water quality. Physical, chemical and biochemical methods. Determination of sodium and potassium: determination of potassium by atomic absorption spectrometry
BS 6068-2.44 Water quality. Physical, chemical and biochemical methods. Determination of sodium and potassium: determination of sodium and potassium by flame emission spectrometry