SS 39:2013 (2019)
[Mature]
Specification for sodium hydroxide solution (caustic soda), technical
...(d) Scandium (internal standard) solutions, 10 mg/l Transfer 1 ml of scandium stock solution,
1000 mg/l and 4 ml of nitric acid solution (E...
...(e) Fe, Cu, Mn, SO
4
, Si and other elements stock solutions, 1000 mg/l commercial solution...
...(f) Multi elements solution,10 mg/l Transfer 1 ml of each stock solution (E...