Item
|
Quality Index
|
Total alkali ( As NH4HCO3 )
|
99.2 – 101.0 %
|
Sulphate ( SO4)
|
0.007 % max
|
Chloride ( As CL-)
|
0.003% max
|
Arsenic ( As )
|
0.0002% max
|
Lead ( As Pb)
|
0.0005% max
|
Iron (Fe)
|
0.002% max
|
Ash ( Residue after evaporation )
|
0.008% max
|
Sulphur ( As S )
|
0.0002% max
|
Copper ( Cu )
|
0.0001% max
|
Mercury ( Hg)
|
0.0001% max
|