• British Pharmacopoeia Volume V
  • Appendices
  • Appendix I C. Standard Solutions

Sulfate Standard Solution (10 ppm SO4) R1
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Sulfate Standard Solution (10 ppm SO4) R1 Sulphate Standard Solution (10 ppm SO4) R1

Immediately before use, dilute with ethanol (30 per cent V/V) R to 100 times its volume a solution containing dipotassium sulfate R equivalent to 0.181 g of K2SO4 in 100.0 mL of ethanol (30 per cent V/V) R.