HG/T 5216-2017
Calcium hypophosphite for industrial use
GB/T 31266-2014
Determination of chloral content for superphosphorate
HG/T 5214~5217-2017
HG/T 2220-1991
HG/T 2221-1991
KS M ISO 3707-2012
Phosphoric acid for industrial use-Determination of calcium content-Flame atomic absorption method
ISO 848:1981
Phosphoric acid for industrial use — Determination of calcium content — Titrimetric method