As,1 ppm,
Pb,5 ppm,
Cd,0,5 ppm,
Hg,0,15 ppm,
Cr,10 ppm,
Cu,30 ppm,
Zn,50 ppm,
SO 2 (European Pharmacopoeia, latest edition),50 ppm,
H 2 O 2 (European Pharmacopoeia, latest edition),10 ppm,

As,1 ppm,
Pb,5 ppm,
Cd,0,5 ppm,
Hg,0,15 ppm,
Cr,10 ppm,
Cu,30 ppm,
Zn,50 ppm,
SO 2 (European Pharmacopoeia, latest edition),50 ppm,
H 2 O 2 (European Pharmacopoeia, latest edition),10 ppm,